Modoc County, CA — Planting Guide
Top priorities for Modoc County, California gardeners in July
We've pulled the most time-sensitive tasks for Modoc County, California this July and put them front and centre. Tackle them in order.
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Begin indoor sowing: basil, cucumber, and kale
You're about 10 weeks out from your last frost — the perfect window to get these germinating indoors.
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Bring in the carrots, kale, and lettuce
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
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Kick off the fall garden with carrots, kale, and lettuce
Your first frost is about 10 weeks away — plenty of time for these to mature.
Coming up in August — start thinking about
- Starting indoors: peppers, astilbe, and begonias
- First harvests: basil, carrots, and cucumber
- Fall sowing: alliums, bachelor's button, and crocus
Modoc County is in USDA Zone 6b. The average last spring frost is May 31 and the first fall frost is September 21, giving you a growing season of approximately 113 days.
At an elevation of 2,205 ft, Modoc County receives approximately 28.3 in of rainfall annually. Summer highs average 83°F with winter lows around 29°F. The predominant soil type is Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 47 days year to year — ranging from May 2 in warm years to June 19 in cold years. The growing season is trending longer by about 3.77 days per decade. Modoc County scores 47/100 (Moderate) on the Microclimate Index.
🌡️ Zone
6b (-5°F to 0°F min)
❄️ Last Frost
May 31
🍂 First Frost
September 21
📅 Growing Season
113 days
⛰️ Elevation
2,205 ft
🌧️ Annual Rainfall
28.3 in
Monthly Watering Calendar for Modoc County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
For new gardeners: Watering math is simple: 1 inch of rainfall delivers ~600 gallons to a 1,000 sq ft garden. Modoc County's 28" annual rainfall covers some months entirely; others need a few hours of drip irrigation per week. The calendar tells you which is which.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 5.6 in | 9 days | — | None |
| Feb | 5.8 in | 9 days | — | None |
| Mar | 4.1 in | 7 days | 0.2 in | Low |
| Apr | 2.1 in | 5 days | 2.2 in | High |
| May | 0.7 in | 1 days | 3.6 in | Critical |
| Jun | 0.1 in | 1 days | 4.2 in | Critical |
| Jul | 0 in | 0 days | 4.3 in | Critical |
| Aug | 0 in | 0 days | 4.3 in | Critical |
| Sep | 0.4 in | 0 days | 3.9 in | Critical |
| Oct | 1.3 in | 2 days | 3 in | High |
| Nov | 2.7 in | 6 days | — | None |
| Dec | 5.5 in | 10 days | — | None |
Annual total: 28.3 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Modoc County Soil Profile
Soil Type
Loam
Soil pH
5.9-7.4
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 19 | Oct 16 | 119 days |
| Cautious | Jun 8 | Oct 2 | 116 days |
| Average year | May 31 | Sep 21 | 113 days |
| Optimistic | May 19 | Sep 16 | 120 days |
| Aggressive (risky) | May 2 | Aug 30 | 120 days |
Not very — frost dates can vary by ±47 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 3.8 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Modoc County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Modoc County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Modoc County's climate and soil.
County Extension Office
Modoc County University of California Cooperative Extension Extension Office
Phone: 530-750-1200
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Modoc County
Finding local nurseries & garden centers in Modoc County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Modoc County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Modoc County CA" or "garden center Modoc County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Modoc County CA" or check your extension office and local parks department. Facebook groups like "Modoc County Gardeners" or "California Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 1 more succession options
Sunlight & Day Length in Modoc County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Why this matters: The longest day at Modoc County's latitude gets longer the further north you go. Strawberries, garlic, onions all care. The shortest day gets shorter — which limits winter growing for greens without artificial light.
Longest Day
15 hours
Summer solstice daylight
Shortest Day
9 hours
Winter solstice daylight
Peak Sun Hours
13.1 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.3 hr | 5.3 hr | Short day |
| February | 10.4 hr | 6.2 hr | Short day |
| March | 11.7 hr | 7.4 hr | Short day |
| April | 13.1 hr | 9.3 hr | Neutral |
| May | 14.3 hr | 10.9 hr | Long day |
| June | 15 hr | 12.9 hr | Long day |
| July | 14.7 hr | 13.1 hr | Long day |
| August | 13.7 hr | 12.5 hr | Neutral |
| September | 12.3 hr | 10.1 hr | Neutral |
| October | 10.8 hr | 7.9 hr | Short day |
| November | 9.6 hr | 5.9 hr | Short day |
| December | 9 hr | 5.1 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Modoc County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Quick context: Most root crops germinate well at 50-60°F. Most fruit-bearing crops want 65-75°F. Modoc County's monthly soil curve maps these windows to actual months.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 26°F | 34°F | ❄️ Dormant | ~36 weeks |
| Feb | 27°F | 33°F | ❄️ Dormant | ~36 weeks |
| Mar | 33°F | 37°F | ❄️ Dormant | ~36 weeks |
| Apr | 46°F | 47°F | 🐢 Slow | ~24 weeks |
| May | 57°F | 55°F | ♻️ Active | ~14 weeks |
| Jun | 69°F | 65°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 72°F | 🔥 Peak | ~8 weeks |
| Aug | 78°F | 73°F | 🔥 Peak | ~8 weeks |
| Sep | 73°F | 69°F | 🔥 Peak | ~8 weeks |
| Oct | 59°F | 60°F | ♻️ Active | ~14 weeks |
| Nov | 44°F | 51°F | 🐢 Slow | ~24 weeks |
| Dec | 34°F | 42°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Modoc County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
What this means for you: Pest pressure is a function of climate, not effort. Modoc County's baseline tells you how much vigilance is normal. A bad pest year in low-pressure region = a normal year in high-pressure region.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Moderate | Jun, Jul, Aug, Sep |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Modoc County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Why this matters: You don't need a farm to use cover crops. A 4x8 raised bed accepts cover crops just as well as a half-acre. Modoc County's climate determines the calendar; the principle is universal.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 13 | Jul 20 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Jun 6 | Jul 27 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | May 5 | Jul 27 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Jun 16 | Sep 7 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Jul 21 | May 17 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Jul 26 | May 10 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 2 | May 17 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 13 | May 10 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 9 | May 10 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 21 | May 17 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 28 | May 10 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Modoc County
For new gardeners: New gardeners under-plan for wind. Modoc County averages 9.7 mph — fine for most days. But every region has its windy days, and the first time a row of unstaked peppers leans over after a storm is a lesson you only need once.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 9 mph Summer: 10 mph
Fall: 7 mph Winter: 8 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
2.6/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Moderate
Some terrain variation (458 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting in Modoc County
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: The first inch of rain washes the roof clean — a first-flush diverter sends it to waste before the barrel fills. Worth the extra $20 for cleaner garden water. Modoc County gets 28" annually, so you'll fill and flush many times per year.
Annual Collection
14,104 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,250 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, Mar, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
May, Jun, Jul, Aug, Sep
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 28.3 inches of rain per year
- A 1,000 sq ft roof can collect roughly 14,104 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (May, Jun, Jul)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Modoc County
Soil Type
Loam
Soil pH 5.9–7.4 · Excessively Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 7.5/10
High drought stress. Consistent irrigation is essential — consider drip systems, heavy mulch, and drought-tolerant varieties.
Season Tips
113-day frost-free season
A short season means indoor starts are critical for warm-season crops. Prioritise cold-hardy, fast-maturing varieties and use row covers to extend autumn harvests.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Modoc County
107 vegetables that grow well in Zone 6b with planting dates for Modoc County.
Show all 107 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 26 | Jun 7 | Jun 14 | — | Sep 6 – Oct 11 | 80–100 |
| Amaranth | Apr 5 | Jun 7 | Jun 14 | — | Sep 13 – Nov 1 | 90–120 |
| Arugula | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Sep 6 | 30–50 |
| Asparagus | — | — | Jun 14 | — | — | 730–1095 |
| Beets | — | May 17 | — | Jul 13 | Jul 12 – Aug 9 | 50–70 |
| Belgian Endive | Apr 26 | May 17 | May 31 | Jul 13 | Sep 20 – Nov 15 | 110–150 |
| Bitter Melon | Apr 5 | Jun 7 | Jun 14 | — | Aug 16 – Sep 27 | 60–90 |
| Black Beans | — | Jun 7 | — | — | Sep 6 – Oct 25 | 90–120 |
| Bok Choy | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 16 | 40–60 |
| Broccoli | Apr 26 | May 17 | May 31 | Jul 13 | Aug 2 – Sep 13 | 60–90 |
| Broccoli Rabe | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 16 | 40–60 |
| Brussels Sprouts | Apr 26 | May 17 | May 31 | Jul 13 | Aug 30 – Oct 25 | 90–130 |
| Butternut Squash | Apr 26 | Jun 7 | Jun 14 | — | Sep 13 – Oct 18 | 85–110 |
| Cabbage | Apr 26 | May 17 | May 31 | Jul 13 | Aug 2 – Sep 27 | 60–100 |
| Calabash | Apr 5 | Jun 7 | Jun 14 | — | Sep 6 – Nov 1 | 80–120 |
| Carrots | — | May 17 | — | Jul 13 | Jul 19 – Aug 23 | 60–80 |
| Cauliflower | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 27 | 55–100 |
| Celeriac | Apr 26 | May 17 | May 31 | Jul 13 | Sep 13 – Oct 18 | 100–120 |
| Celery | Apr 26 | May 17 | May 31 | Jul 13 | Aug 23 – Oct 18 | 80–120 |
| Celtuce | Apr 26 | May 17 | May 31 | Jul 13 | Aug 2 – Sep 13 | 60–90 |
| Chard | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 13 | 50–60 |
| Chickpeas | Apr 26 | May 17 | May 31 | Jul 13 | Aug 23 – Oct 4 | 80–110 |
| Chicory | Apr 26 | May 17 | May 31 | Jul 13 | Aug 2 – Sep 13 | 60–85 |
| Chinese Cabbage | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Aug 23 | 50–70 |
| Christmas Lima Beans | Apr 5 | Jun 7 | Jun 14 | — | Sep 6 – Oct 11 | 80–100 |
| Collard Greens | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 27 | 55–75 |
| Corn | — | Jun 7 | — | — | Aug 9 – Oct 4 | 60–100 |
| Cowpeas | — | Jun 7 | — | — | Aug 9 – Sep 20 | 60–90 |
| Cress | Apr 26 | May 17 | May 31 | Jul 13 | Jun 14 – Jul 5 | 14–21 |
| Crookneck Squash | Apr 26 | Jun 7 | Jun 14 | — | Aug 2 – Aug 30 | 45–60 |
| Crosne | — | May 17 | — | Jul 13 | Oct 18 – Nov 29 | 150–200 |
| Cucumber | Apr 26 | Jun 7 | Jun 14 | — | Aug 9 – Oct 4 | 50–70 |
| Daikon | — | May 17 | — | Jul 13 | Jul 12 – Aug 9 | 50–70 |
| Delicata Squash | Apr 26 | Jun 7 | Jun 14 | — | Sep 6 – Oct 11 | 80–100 |
| Edamame | — | Jun 7 | — | — | Aug 23 – Oct 4 | 75–100 |
| Eggplant | Mar 22 | Jun 7 | Jun 14 | — | Aug 23 – Oct 25 | 65–85 |
| Endive | Apr 26 | May 17 | May 31 | Jul 13 | Jul 19 – Aug 23 | 45–65 |
| Escarole | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Aug 23 | 50–70 |
| Fava Beans | Apr 26 | May 17 | May 31 | Jul 13 | Aug 16 – Sep 27 | 75–100 |
| Fennel | Apr 5 | Jun 7 | Jun 14 | — | Aug 16 – Sep 27 | 60–90 |
| Garlic | — | — | — | Aug 10 | Nov 9 – Feb 22 | 90–240 |
| Green Beans | — | Jun 7 | — | — | Aug 2 – Sep 27 | 50–65 |
| Horseradish | — | — | Jun 14 | — | Oct 18 – Dec 27 | 120–180 |
| Hot Peppers | Mar 22 | Jun 7 | Jun 14 | — | Aug 23 – Nov 29 | 70–120 |
| Hubbard Squash | Apr 26 | Jun 7 | Jun 14 | — | Sep 27 – Nov 1 | 100–120 |
| Kabocha | Apr 26 | Jun 7 | Jun 14 | — | Sep 13 – Oct 11 | 85–100 |
| Kai Lan | Apr 26 | May 17 | May 31 | Jul 13 | Jul 19 – Aug 16 | 45–60 |
| Kale | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 20 | 50–70 |
| Kidney Beans | — | Jun 7 | — | — | Sep 6 – Oct 11 | 85–110 |
| Kohlrabi | Apr 26 | May 17 | May 31 | Jul 13 | Jul 19 – Aug 23 | 45–65 |
| Komatsuna | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Aug 9 | 35–50 |
| Leeks | Apr 26 | May 17 | May 31 | Jul 13 | Aug 30 – Nov 15 | 90–150 |
| Lentils | Apr 26 | May 17 | May 31 | Jul 13 | Aug 23 – Oct 4 | 80–110 |
| Lettuce | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Sep 13 | 30–60 |
| Lima Beans | — | Jun 7 | — | — | Aug 9 – Sep 20 | 60–90 |
| Loofah | Apr 5 | Jun 7 | Jun 14 | — | Sep 27 – Nov 29 | 100–150 |
| Luffa | Apr 5 | Jun 7 | Jun 14 | — | Sep 13 – Nov 29 | 90–150 |
| Mache | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 16 | 40–60 |
| Melon | Apr 26 | Jun 7 | Jun 14 | — | Aug 23 – Oct 11 | 70–100 |
| Microgreens | Apr 26 | May 17 | May 31 | Jul 13 | Jun 7 – Jul 5 | 7–21 |
| Mitsuba | Apr 26 | May 17 | May 24 | Jul 13 | Jul 19 – Sep 13 | 50–70 |
| Mizuna | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Aug 2 | 30–45 |
| Mustard Greens | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Sep 6 | 30–50 |
| Napa Cabbage | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Aug 30 | 55–75 |
| New Zealand Spinach | Apr 5 | Jun 7 | Jun 14 | — | Aug 9 – Sep 6 | 55–70 |
| Okra | Apr 5 | Jun 7 | Jun 14 | — | Aug 9 – Oct 4 | 50–65 |
| Onion | Apr 26 | May 17 | May 31 | Jul 13 | Aug 30 – Oct 18 | 90–120 |
| Pac Choi | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 9 | 40–55 |
| Parsnip | — | May 17 | — | Jul 13 | Aug 30 – Oct 11 | 100–130 |
| Patty Pan Squash | Apr 26 | Jun 7 | Jun 14 | — | Aug 2 – Aug 30 | 45–60 |
| Peas | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 20 | 55–70 |
| Peppers | Mar 22 | Jun 7 | Jun 14 | — | Aug 16 – Oct 25 | 60–90 |
| Pole Beans | Apr 5 | Jun 7 | Jun 14 | — | Aug 9 – Oct 4 | 55–70 |
| Potatoes | Apr 5 | Jun 7 | Jun 14 | — | Aug 23 – Nov 1 | 70–120 |
| Pumpkin | Apr 26 | Jun 7 | Jun 14 | — | Sep 13 – Nov 1 | 85–120 |
| Purslane | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 16 | 40–60 |
| Radicchio | Apr 26 | May 17 | May 31 | Jul 13 | Aug 2 – Sep 6 | 60–80 |
| Radish | — | May 17 | — | Jul 13 | Jun 14 – Jul 5 | 22–35 |
| Rhubarb | — | — | Jun 21 | — | — | 365–730 |
| Romanesco | Apr 26 | May 17 | May 31 | Jul 13 | Aug 16 – Sep 27 | 75–100 |
| Rutabaga | — | May 17 | — | Jul 13 | Aug 9 – Sep 13 | 80–100 |
| Salsify | — | May 17 | — | Jul 13 | Aug 30 – Oct 11 | 100–130 |
| Savoy Cabbage | Apr 26 | May 17 | May 31 | Jul 13 | Aug 9 – Oct 4 | 70–110 |
| Scallions | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Aug 23 | 50–70 |
| Scarlet Runner Beans | Apr 5 | Jun 7 | Jun 14 | — | Aug 16 – Sep 20 | 60–80 |
| Shallot | Apr 26 | May 17 | May 31 | Jul 13 | Aug 30 – Oct 18 | 90–120 |
| Shiso | Apr 12 | Jun 7 | Jun 14 | — | Aug 9 – Oct 4 | 50–70 |
| Snap Peas | Apr 5 | Jun 7 | Jun 14 | — | Aug 9 – Oct 4 | 55–70 |
| Snow Peas | Apr 26 | May 17 | May 31 | Jul 13 | Jul 26 – Sep 20 | 50–65 |
| Soybeans | — | Jun 7 | — | — | Aug 30 – Oct 25 | 80–120 |
| Spaghetti Squash | Apr 26 | Jun 7 | Jun 14 | — | Sep 13 – Oct 11 | 85–100 |
| Spinach | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Sep 6 | 35–50 |
| Squash (Summer) | Apr 26 | Jun 7 | Jun 14 | — | Aug 2 – Oct 4 | 45–65 |
| Squash (Winter) | Apr 26 | Jun 7 | Jun 14 | — | Sep 6 – Nov 1 | 80–120 |
| Sunchoke | — | — | Jun 14 | — | Oct 4 – Nov 29 | 110–150 |
| Sweet Corn | — | Jun 7 | — | — | Aug 9 – Sep 20 | 60–90 |
| Sweet Potatoes | Apr 5 | Jun 7 | Jun 14 | — | Sep 13 – Nov 1 | 90–120 |
| Tatsoi | Apr 26 | May 17 | May 31 | Jul 13 | Jul 5 – Aug 9 | 35–50 |
| Tomatillo | Apr 5 | Jun 7 | Jun 14 | — | Aug 16 – Oct 25 | 60–85 |
| Tomatoes | Apr 5 | Jun 7 | Jun 14 | — | Aug 16 – Oct 25 | 60–85 |
| Turnip | — | May 17 | — | Jul 13 | Jun 28 – Aug 2 | 40–60 |
| Watercress | Apr 26 | May 17 | May 31 | Jul 13 | Jul 12 – Aug 16 | 40–60 |
| Watermelon | Apr 26 | Jun 7 | Jun 14 | — | Aug 23 – Oct 11 | 70–100 |
| Wax Beans | — | Jun 7 | — | — | Aug 2 – Sep 27 | 50–65 |
| Winter Melon | Apr 5 | Jun 7 | Jun 14 | — | Sep 13 – Nov 1 | 90–120 |
| Yard Long Beans | Apr 5 | Jun 7 | Jun 14 | — | Aug 9 – Sep 20 | 55–80 |
| Zucchini | Apr 26 | Jun 7 | Jun 14 | — | Aug 2 – Sep 27 | 45–60 |
🍓 Fruits to Grow in Modoc County
27 fruits that grow well in Zone 6b with planting dates for Modoc County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 21 | — | Sep 20 – Jan 3 | 90–180 |
| Aronia | — | — | Jun 21 | — | — | 730–1095 |
| Blackberries | — | — | Jun 21 | — | — | 365–730 |
| Blueberries | — | — | Jun 21 | — | — | 730–1095 |
| Boysenberries | — | — | Jun 21 | — | — | 365–730 |
| Cantaloupe | — | — | Jun 21 | — | Aug 30 – Oct 4 | 70–90 |
| Che Fruit | — | — | Jun 21 | — | — | 1095–1825 |
| Cranberries | — | — | Jun 21 | — | — | 730–1095 |
| Currants | — | — | Jun 21 | — | — | 730–1095 |
| Elderberries | — | — | Jun 21 | — | — | 730–1095 |
| Goji Berries | — | — | Jun 21 | — | — | 730–1095 |
| Gooseberries | — | — | Jun 21 | — | — | 730–1095 |
| Grapes | — | — | Jun 21 | — | — | 730–1095 |
| Ground Cherry | — | — | Jun 21 | — | Aug 30 – Oct 25 | 65–80 |
| Hardy Kiwi | — | — | Jun 21 | — | — | 1095–1825 |
| Haskaps | — | — | Jun 21 | — | — | 730–1095 |
| Honeydew | — | — | Jun 21 | — | Sep 13 – Oct 25 | 80–110 |
| Jostaberry | — | — | Jun 21 | — | — | 730–1095 |
| Lingonberries | — | — | Jun 21 | — | — | 730–1095 |
| Medlar | — | — | Jun 21 | — | — | 1095–1825 |
| Mulberries | — | — | Jun 21 | — | — | 730–1825 |
| Pawpaw | — | — | Jun 21 | — | — | 1095–2555 |
| Persimmon | — | — | Jun 21 | — | — | 1095–2555 |
| Quince | — | — | Jun 21 | — | — | 1095–1825 |
| Raspberries | — | — | Jun 21 | — | — | 365–730 |
| Serviceberries | — | — | Jun 21 | — | — | 730–1095 |
| Strawberries | — | — | Jun 21 | — | Sep 20 – Jan 3 | 90–365 |
🌿 Herbs to Grow in Modoc County
35 herbs that grow well in Zone 6b with planting dates for Modoc County.
Show all 35 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 26 | May 17 | May 24 | Jul 13 | — | 365–730 |
| Anise | Apr 26 | May 17 | May 24 | Jul 13 | Aug 23 – Nov 8 | 90–120 |
| Basil | Apr 12 | Jun 7 | Jun 14 | — | Aug 9 – Oct 11 | 50–75 |
| Bee Balm | — | — | Jun 7 | — | Sep 6 – Nov 22 | 90–120 |
| Borage | Apr 26 | May 17 | May 24 | Jul 13 | Jul 19 – Sep 6 | 50–60 |
| Caraway | Apr 26 | May 17 | May 24 | Jul 13 | — | 365–450 |
| Catnip | — | — | Jun 7 | — | Aug 9 – Oct 11 | 60–80 |
| Chamomile | Apr 26 | May 17 | May 24 | Jul 13 | Jul 26 – Oct 4 | 60–90 |
| Chervil | Apr 26 | May 17 | May 24 | Jul 13 | Jul 5 – Sep 6 | 40–60 |
| Chives | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Cilantro | Apr 26 | May 17 | May 24 | Jul 13 | Jul 5 – Sep 6 | 40–60 |
| Comfrey | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Cumin | Apr 26 | May 17 | May 24 | Jul 13 | Sep 6 – Nov 8 | 100–120 |
| Dill | Apr 26 | May 17 | May 24 | Jul 13 | Jul 5 – Sep 6 | 40–60 |
| Epazote | Apr 12 | Jun 7 | Jun 14 | — | Aug 2 – Sep 27 | 45–60 |
| Fennel (herb) | Apr 26 | May 17 | May 24 | Jul 13 | Jul 26 – Oct 4 | 60–90 |
| Feverfew | — | — | Jun 7 | — | Sep 6 – Nov 22 | 90–120 |
| Garlic Chives | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Horehound | — | — | Jun 7 | — | Aug 23 – Oct 18 | 75–90 |
| Hyssop | — | — | Jun 7 | — | Aug 16 – Oct 18 | 70–90 |
| Lemon Balm | — | — | Jun 7 | — | Aug 9 – Sep 27 | 60–70 |
| Lemon Thyme | — | — | Jun 7 | — | Aug 16 – Oct 18 | 70–90 |
| Lovage | — | — | Jun 7 | — | Aug 16 – Oct 18 | 70–90 |
| Marjoram | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Mint | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Oregano | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Parsley | Apr 26 | May 17 | May 24 | Jul 13 | Jul 26 – Sep 27 | 60–80 |
| Rue | — | — | Jun 7 | — | Aug 16 – Oct 18 | 70–90 |
| Sage | — | — | Jun 7 | — | Aug 23 – Oct 18 | 75–90 |
| Savory | — | — | Jun 7 | — | Aug 2 – Sep 27 | 50–70 |
| Sorrel | Apr 26 | May 17 | May 24 | Jul 13 | Jul 5 – Sep 6 | 40–60 |
| Tarragon | — | — | Jun 7 | — | Aug 9 – Oct 18 | 60–90 |
| Thai Basil | Apr 12 | Jun 7 | Jun 14 | — | Aug 9 – Oct 11 | 50–75 |
| Thyme | — | — | Jun 7 | — | Aug 16 – Oct 18 | 70–90 |
| Valerian | — | — | Jun 7 | — | Oct 11 – Dec 20 | 120–180 |
🌸 Flowers to Grow in Modoc County
53 flowers that grow well in Zone 6b with planting dates for Modoc County.
Show all 53 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Apr 12 | May 31 | May 31 | — | Jul 26 – Nov 8 | 60–75 |
| Alliums | — | — | — | Aug 10 | Sep 7 – Oct 5 | 28–42 |
| Anemones | May 3 | — | May 31 | — | Jun 28 – Jul 26 | 90–120 |
| Astilbe | Mar 29 | — | Jun 7 | — | Aug 16 – Oct 25 | 70–100 |
| Bachelor's Button | Apr 19 | May 3 | May 31 | Aug 10 | Aug 2 – Oct 25 | 60–90 |
| Begonias | Mar 22 | — | Jun 7 | — | Aug 16 – Nov 22 | 70–90 |
| Black-eyed Susan | Mar 29 | May 31 | Jun 7 | — | Aug 23 – Dec 13 | 60–80 |
| Bleeding Hearts | Mar 29 | — | Jun 7 | — | Aug 2 – Sep 6 | 60–90 |
| Calendula | Apr 19 | May 3 | May 31 | — | Jul 19 – Oct 25 | 50–70 |
| California Poppy | — | May 3 | — | — | Jul 12 – Sep 6 | 60–90 |
| Celosia | Apr 26 | Jun 7 | Jun 7 | — | Aug 9 – Nov 29 | 60–90 |
| Columbine | Mar 29 | Jun 7 | Jun 7 | — | Aug 2 – Sep 6 | 70–100 |
| Coreopsis | Mar 29 | May 31 | Jun 7 | — | Aug 16 – Dec 13 | 60–80 |
| Cosmos | May 3 | May 31 | May 31 | — | Aug 9 – Nov 22 | 60–90 |
| Crocus | — | — | — | Aug 10 | Jun 29 – Jul 20 | 10–20 |
| Daffodils | — | — | — | Aug 10 | Jul 6 – Jul 27 | 20–40 |
| Dahlias | May 3 | Jun 7 | Jun 7 | — | Aug 23 – Dec 13 | 70–120 |
| Daylily | Mar 29 | — | Jun 7 | — | Aug 23 – Dec 13 | 60–90 |
| Dianthus | Apr 5 | May 3 | May 10 | — | Jun 28 – Sep 27 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 29 | Jun 7 | Jun 7 | — | Aug 23 – Dec 13 | 70–90 |
| Foxglove | Mar 29 | Jun 7 | Jun 7 | — | Aug 2 – Sep 6 | 80–120 |
| Gaillardia (Blanket Flower) | Apr 12 | Jun 7 | Jun 7 | — | Aug 16 – Dec 20 | 70–100 |
| Geraniums | Mar 22 | — | Jun 7 | — | Aug 16 – Nov 22 | 70–100 |
| Gladiolus | — | May 31 | May 31 | — | Aug 16 – Dec 6 | 70–100 |
| Hostas | Mar 22 | — | Jun 7 | — | Aug 23 – Dec 13 | 60–90 |
| Hyacinths | — | — | — | Aug 10 | Jul 27 – Aug 17 | 14–28 |
| Hydrangeas | Mar 22 | — | Jun 7 | — | Aug 16 – Nov 29 | 90–150 |
| Impatiens | Apr 5 | — | Jun 7 | — | Aug 16 – Nov 29 | 60–75 |
| Irises | — | Division | Jun 7 | — | Aug 2 – Aug 30 | 60–100 |
| Larkspur | — | May 3 | — | — | Jul 12 – Sep 6 | 60–90 |
| Lavender | Mar 22 | — | Jun 14 | — | Aug 23 – Oct 18 | 90–120 |
| Lilies | — | Division | Jun 7 | — | Aug 16 – Nov 22 | 70–120 |
| Lobelia | Mar 29 | — | May 17 | — | Jul 12 – Oct 4 | 70–80 |
| Lupine | Mar 29 | Jun 7 | Jun 7 | — | Aug 2 – Sep 6 | 75–100 |
| Marigolds | Apr 19 | May 31 | May 31 | — | Jul 26 – Nov 1 | 50–70 |
| Nasturtium | May 3 | May 31 | May 31 | — | Jul 26 – Nov 22 | 55–65 |
| Pansy | Mar 22 | — | May 31 | Jul 27 | Jul 26 – Oct 4 | 70–90 |
| Peonies | — | Division | Jun 7 | — | Aug 9 – Sep 13 | 90–120 |
| Petunia | Apr 5 | — | Jun 7 | — | Aug 16 – Nov 29 | 70–90 |
| Phlox | Mar 29 | Jun 7 | Jun 7 | — | Aug 16 – Nov 8 | 80–110 |
| Portulaca | Apr 26 | Jun 7 | Jun 7 | — | Jul 26 – Nov 15 | 50–70 |
| Ranunculus | Apr 19 | — | May 31 | — | Jul 5 – Aug 2 | 90–120 |
| Roses | Mar 22 | — | Jun 7 | — | Aug 16 – Dec 13 | 90–180 |
| Salvia | Mar 29 | — | May 31 | — | Aug 9 – Nov 22 | 70–90 |
| Sedum (Stonecrop) | Mar 29 | — | Jun 7 | — | Sep 27 – Dec 20 | 60–90 |
| Snapdragon | Mar 22 | May 10 | May 31 | — | Aug 9 – Oct 25 | 70–100 |
| Sunflower | May 10 | May 31 | May 31 | — | Aug 23 – Nov 22 | 70–100 |
| Sweet Alyssum | Apr 19 | May 10 | May 31 | — | Jul 12 – Sep 27 | 45–60 |
| Sweet Pea | Apr 19 | Apr 26 | May 31 | — | Aug 16 – Oct 25 | 65–85 |
| Tulips | — | — | — | Aug 17 | Jul 27 – Aug 24 | 15–30 |
| Vinca (Annual) | Mar 22 | — | Jun 7 | — | Aug 16 – Nov 29 | 70–90 |
| Yarrow | Mar 29 | May 31 | Jun 7 | — | Aug 16 – Dec 13 | 60–90 |
| Zinnia | May 3 | May 31 | May 31 | — | Aug 9 – Nov 15 | 60–70 |
Monthly Planting Guide for Modoc County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Modoc County.
Frequently Asked Questions
What planting zone is Modoc County, CA?
Modoc County is in USDA Hardiness Zone 6b. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Modoc County, CA?
Based on 31 years of NOAA weather station data, the median last spring frost in Modoc County falls around May 31. In 8 out of 10 years, last frost lands between May 2 and June 19 — a 47-day window of variability. Use June 19 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Modoc County, CA?
The median first fall frost in Modoc County arrives around September 21. In cold years it can arrive as early as August 30; in mild years as late as October 16. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Modoc County?
Modoc County has a frost-free growing season of approximately 113 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost. Climate records show the growing season is trending longer by about 3.77 days per decade.
What is the soil like in Modoc County for gardening?
Modoc County has predominantly Loam soil with a pH range of 5.9–7.4 and Excessively Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Modoc County?
Modoc County has commercial agriculture that includes Almonds, Grapes, Hay, Dairy. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Modoc County a good location for home gardening?
Modoc County scores 47/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Your Modoc County Garden Planner — Free
A 22-page printable planner built for Modoc County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log