Lassen County, CA — Planting Guide
Lassen County is in USDA Zone 6b. The average last spring frost is May 28 and the first fall frost is September 29, giving you a growing season of approximately 124 days.
At an elevation of 1,854 ft, Lassen County receives approximately 43.7 in of rainfall annually. Summer highs average 84°F with winter lows around 28°F. The predominant soil type is Loam.
Based on 28 years of NOAA climate station data, the last frost date here varies by 47 days year to year — ranging from May 3 in warm years to June 19 in cold years. Lassen County scores 69/100 (Good) on the Microclimate Index.
🌡️ Zone
6b (-5°F to 0°F min)
❄️ Last Frost
May 28
🍂 First Frost
September 29
📅 Growing Season
124 days
⛰️ Elevation
1,854 ft
🌧️ Annual Rainfall
43.7 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 9.2 in | 10 days | — | None |
| Feb | 9.8 in | 10 days | — | None |
| Mar | 7.7 in | 7 days | — | Low |
| Apr | 3.2 in | 4 days | 1.1 in | Moderate |
| May | 1 in | 2 days | 3.3 in | Critical |
| Jun | 0.2 in | 1 days | 4.1 in | Critical |
| Jul | 0 in | 0 days | 4.3 in | Critical |
| Aug | 0 in | 0 days | 4.3 in | Critical |
| Sep | 0.5 in | 0 days | 3.8 in | Critical |
| Oct | 1.7 in | 3 days | 2.6 in | High |
| Nov | 3.9 in | 5 days | — | None |
| Dec | 6.5 in | 8 days | — | None |
Annual total: 43.7 in. Gardens typically need ~1 inch of water per week during the growing season. Months marked "None" for extra water are outside the active growing season for your zone — most gardens are dormant and don't need irrigation during those months.
Lassen County Soil Profile
Soil Type
Loam
Soil pH
6.1-7.5
Drainage
Well Drained
Frost Risk Probability
Based on 28 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 25 | 128 days |
| Cautious | Jun 8 | Oct 9 | 123 days |
| Average year | May 28 | Sep 29 | 124 days |
| Optimistic | May 18 | Sep 17 | 122 days |
| Aggressive (risky) | May 3 | Sep 5 | 125 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.
Gardening Difficulty Score
Lassen County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Lassen 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 Lassen County's climate and soil.
County Extension Office
Lassen 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 Lassen County
Finding local nurseries & garden centers in Lassen County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Lassen 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 Lassen County CA" or "garden center Lassen 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 Lassen County CA" or check your extension office and local parks department. Facebook groups like "Lassen 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 2 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
14.9 hours
Summer solstice daylight
Shortest Day
9.1 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 | 9.4 hr | 5.5 hr | Short day |
| February | 10.4 hr | 6.3 hr | Short day |
| March | 11.7 hr | 7.7 hr | Short day |
| April | 13.1 hr | 9.6 hr | Neutral |
| May | 14.3 hr | 11.8 hr | Long day |
| June | 14.9 hr | 13.1 hr | Long day |
| July | 14.6 hr | 13 hr | Long day |
| August | 13.6 hr | 11.8 hr | Neutral |
| September | 12.3 hr | 10 hr | Neutral |
| October | 10.9 hr | 8.4 hr | Short day |
| November | 9.7 hr | 5.7 hr | Short day |
| December | 9.1 hr | 5.2 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
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 | 28°F | 36°F | ❄️ Dormant | ~36 weeks |
| Feb | 29°F | 35°F | ❄️ Dormant | ~36 weeks |
| Mar | 38°F | 39°F | ❄️ Dormant | ~36 weeks |
| Apr | 47°F | 47°F | 🐢 Slow | ~24 weeks |
| May | 59°F | 58°F | ♻️ Active | ~14 weeks |
| Jun | 69°F | 67°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 72°F | 🔥 Peak | ~8 weeks |
| Aug | 80°F | 74°F | 🔥 Peak | ~8 weeks |
| Sep | 73°F | 70°F | 🔥 Peak | ~8 weeks |
| Oct | 58°F | 64°F | ♻️ Active | ~14 weeks |
| Nov | 45°F | 50°F | 🐢 Slow | ~24 weeks |
| Dec | 33°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 Lassen County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | High | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Low | Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Lassen County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 2 | May 14 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 5 | May 14 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 10 | May 7 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 10 | May 7 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 25 | May 7 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 24 | May 7 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 7 | May 14 | — | Erosion control, weed suppression, good biomass |
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 4 | Aug 4 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Jun 2 | Aug 4 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 30 | Aug 4 | ✓ 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 13 | Sep 1 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 10 mph Summer: 10 mph
Fall: 8 mph Winter: 8 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.3/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (623 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
21,780 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,500 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
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 43.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 21,780 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jun, Jul, Aug)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Lassen County
Soil Type
Loam
Soil pH 6.1–7.5 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 5.5/10
Moderate drought pressure. Drip irrigation and mulching are highly recommended to maintain soil moisture through summer.
Season Tips
124-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.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
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 Lassen County
108 vegetables that grow well in Zone 6b with planting dates for Lassen County.
Show all 108 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 23 | Jun 4 | Jun 11 | Sep 3 – Oct 8 | 80–100 |
| Amaranth | Apr 2 | Jun 4 | Jun 11 | Sep 10 – Oct 29 | 90–120 |
| Arugula | Apr 23 | May 14 | May 28 | Jul 2 – Sep 3 | 30–50 |
| Asparagus | — | — | Jun 11 | — | 730–1095 |
| Beets | — | May 14 | — | Jul 9 – Aug 6 | 50–70 |
| Belgian Endive | Apr 23 | May 14 | May 28 | Sep 17 – Nov 12 | 110–150 |
| Bitter Melon | Apr 2 | Jun 4 | Jun 11 | Aug 13 – Sep 24 | 60–90 |
| Black Beans | — | Jun 4 | — | Sep 3 – Oct 22 | 90–120 |
| Bok Choy | Apr 23 | May 14 | May 28 | Jul 9 – Aug 13 | 40–60 |
| Broccoli | Apr 23 | May 14 | May 28 | Jul 30 – Sep 10 | 60–90 |
| Broccoli Rabe | Apr 23 | May 14 | May 28 | Jul 9 – Aug 13 | 40–60 |
| Brussels Sprouts | Apr 23 | May 14 | May 28 | Aug 27 – Oct 22 | 90–130 |
| Butternut Squash | Apr 23 | Jun 4 | Jun 11 | Sep 10 – Oct 15 | 85–110 |
| Cabbage | Apr 23 | May 14 | May 28 | Jul 30 – Sep 24 | 60–100 |
| Calabash | Apr 2 | Jun 4 | Jun 11 | Sep 3 – Oct 29 | 80–120 |
| Carrots | — | May 14 | — | Jul 16 – Aug 20 | 60–80 |
| Cauliflower | Apr 23 | May 14 | May 28 | Jul 23 – Sep 24 | 55–100 |
| Celeriac | Apr 23 | May 14 | May 28 | Sep 10 – Oct 15 | 100–120 |
| Celery | Apr 23 | May 14 | May 28 | Aug 20 – Oct 15 | 80–120 |
| Celtuce | Apr 23 | May 14 | May 28 | Jul 30 – Sep 10 | 60–90 |
| Chard | Apr 23 | May 14 | May 28 | Jul 23 – Sep 10 | 50–60 |
| Chickpeas | Apr 23 | May 14 | May 28 | Aug 20 – Oct 1 | 80–110 |
| Chicory | Apr 23 | May 14 | May 28 | Jul 30 – Sep 10 | 60–85 |
| Chinese Cabbage | Apr 23 | May 14 | May 28 | Jul 23 – Aug 20 | 50–70 |
| Christmas Lima Beans | Apr 2 | Jun 4 | Jun 11 | Sep 3 – Oct 8 | 80–100 |
| Collard Greens | Apr 23 | May 14 | May 28 | Jul 23 – Sep 24 | 55–75 |
| Corn | — | Jun 4 | — | Aug 6 – Oct 1 | 60–100 |
| Cowpeas | — | Jun 4 | — | Aug 6 – Sep 17 | 60–90 |
| Cress | Apr 23 | May 14 | May 28 | Jun 11 – Jul 2 | 14–21 |
| Crookneck Squash | Apr 23 | Jun 4 | Jun 11 | Jul 30 – Aug 27 | 45–60 |
| Crosne | — | May 14 | — | Oct 15 – Nov 26 | 150–200 |
| Cucumber | Apr 23 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 50–70 |
| Daikon | — | May 14 | — | Jul 9 – Aug 6 | 50–70 |
| Delicata Squash | Apr 23 | Jun 4 | Jun 11 | Sep 3 – Oct 8 | 80–100 |
| Edamame | — | Jun 4 | — | Aug 20 – Oct 1 | 75–100 |
| Eggplant | Mar 19 | Jun 4 | Jun 11 | Aug 20 – Oct 22 | 65–85 |
| Endive | Apr 23 | May 14 | May 28 | Jul 16 – Aug 20 | 45–65 |
| Escarole | Apr 23 | May 14 | May 28 | Jul 23 – Aug 20 | 50–70 |
| Fava Beans | Apr 23 | May 14 | May 28 | Aug 13 – Sep 24 | 75–100 |
| Fennel | Apr 2 | Jun 4 | Jun 11 | Aug 13 – Sep 24 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Jun 4 | — | Jul 30 – Sep 24 | 50–65 |
| Horseradish | — | — | Jun 11 | Oct 15 – Dec 24 | 120–180 |
| Hot Peppers | Mar 19 | Jun 4 | Jun 11 | Aug 20 – Nov 26 | 70–120 |
| Hubbard Squash | Apr 23 | Jun 4 | Jun 11 | Sep 24 – Oct 29 | 100–120 |
| Kabocha | Apr 23 | Jun 4 | Jun 11 | Sep 10 – Oct 8 | 85–100 |
| Kai Lan | Apr 23 | May 14 | May 28 | Jul 16 – Aug 13 | 45–60 |
| Kale | Apr 23 | May 14 | May 28 | Jul 23 – Sep 17 | 50–70 |
| Kidney Beans | — | Jun 4 | — | Sep 3 – Oct 8 | 85–110 |
| Kohlrabi | Apr 23 | May 14 | May 28 | Jul 16 – Aug 20 | 45–65 |
| Komatsuna | Apr 23 | May 14 | May 28 | Jul 2 – Aug 6 | 35–50 |
| Leeks | Apr 23 | May 14 | May 28 | Aug 27 – Nov 12 | 90–150 |
| Lentils | Apr 23 | May 14 | May 28 | Aug 20 – Oct 1 | 80–110 |
| Lettuce | Apr 23 | May 14 | May 28 | Jul 2 – Sep 10 | 30–60 |
| Lima Beans | — | Jun 4 | — | Aug 6 – Sep 17 | 60–90 |
| Loofah | Apr 2 | Jun 4 | Jun 11 | Sep 24 – Nov 26 | 100–150 |
| Luffa | Apr 2 | Jun 4 | Jun 11 | Sep 10 – Nov 26 | 90–150 |
| Mache | Apr 23 | May 14 | May 28 | Jul 9 – Aug 13 | 40–60 |
| Melon | Apr 23 | Jun 4 | Jun 11 | Aug 20 – Oct 8 | 70–100 |
| Microgreens | Apr 23 | May 14 | May 28 | Jun 4 – Jul 2 | 7–21 |
| Mitsuba | Apr 23 | May 14 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Mizuna | Apr 23 | May 14 | May 28 | Jul 2 – Jul 30 | 30–45 |
| Mustard Greens | Apr 23 | May 14 | May 28 | Jul 2 – Sep 3 | 30–50 |
| Napa Cabbage | Apr 23 | May 14 | May 28 | Jul 23 – Aug 27 | 55–75 |
| New Zealand Spinach | Apr 2 | Jun 4 | Jun 11 | Aug 6 – Sep 3 | 55–70 |
| Okra | Apr 2 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 50–65 |
| Onion | Apr 23 | May 14 | May 28 | Aug 27 – Oct 15 | 90–120 |
| Pac Choi | Apr 23 | May 14 | May 28 | Jul 9 – Aug 6 | 40–55 |
| Parsnip | — | May 14 | — | Aug 27 – Oct 8 | 100–130 |
| Patty Pan Squash | Apr 23 | Jun 4 | Jun 11 | Jul 30 – Aug 27 | 45–60 |
| Peas | Apr 23 | May 14 | May 28 | Jul 23 – Sep 17 | 55–70 |
| Peppers | Mar 19 | Jun 4 | Jun 11 | Aug 13 – Oct 22 | 60–90 |
| Pole Beans | Apr 2 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 55–70 |
| Potatoes | Apr 2 | Jun 4 | Jun 11 | Aug 20 – Oct 29 | 70–120 |
| Pumpkin | Apr 23 | Jun 4 | Jun 11 | Sep 10 – Oct 29 | 85–120 |
| Purslane | Apr 23 | May 14 | May 28 | Jul 9 – Aug 13 | 40–60 |
| Radicchio | Apr 23 | May 14 | May 28 | Jul 30 – Sep 3 | 60–80 |
| Radish | — | May 14 | — | Jun 11 – Jul 2 | 22–35 |
| Rhubarb | — | — | Jun 18 | — | 365–730 |
| Romanesco | Apr 23 | May 14 | May 28 | Aug 13 – Sep 24 | 75–100 |
| Rutabaga | — | May 14 | — | Aug 6 – Sep 10 | 80–100 |
| Salsify | — | May 14 | — | Aug 27 – Oct 8 | 100–130 |
| Savoy Cabbage | Apr 23 | May 14 | May 28 | Aug 6 – Oct 1 | 70–110 |
| Scallions | Apr 23 | May 14 | May 28 | Jul 23 – Aug 20 | 50–70 |
| Scarlet Runner Beans | Apr 2 | Jun 4 | Jun 11 | Aug 13 – Sep 17 | 60–80 |
| Shallot | Apr 23 | May 14 | May 28 | Aug 27 – Oct 15 | 90–120 |
| Shiso | Apr 9 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 50–70 |
| Snap Peas | Apr 2 | Jun 4 | Jun 11 | Aug 6 – Oct 1 | 55–70 |
| Snow Peas | Apr 23 | May 14 | May 28 | Jul 23 – Sep 17 | 50–65 |
| Soybeans | — | Jun 4 | — | Aug 27 – Oct 22 | 80–120 |
| Spaghetti Squash | Apr 23 | Jun 4 | Jun 11 | Sep 10 – Oct 8 | 85–100 |
| Spinach | Apr 23 | May 14 | May 28 | Jul 2 – Sep 3 | 35–50 |
| Squash (Summer) | Apr 23 | Jun 4 | Jun 11 | Jul 30 – Oct 1 | 45–65 |
| Squash (Winter) | Apr 23 | Jun 4 | Jun 11 | Sep 3 – Oct 29 | 80–120 |
| Sunchoke | — | — | Jun 11 | Oct 1 – Nov 26 | 110–150 |
| Sunflower | Apr 2 | Jun 4 | Jun 11 | Aug 20 – Oct 8 | 70–100 |
| Sweet Corn | — | Jun 4 | — | Aug 6 – Sep 17 | 60–90 |
| Sweet Potatoes | Apr 2 | Jun 4 | Jun 11 | Sep 10 – Oct 29 | 90–120 |
| Tatsoi | Apr 23 | May 14 | May 28 | Jul 2 – Aug 6 | 35–50 |
| Tomatillo | Apr 2 | Jun 4 | Jun 11 | Aug 13 – Oct 22 | 60–85 |
| Tomatoes | Apr 2 | Jun 4 | Jun 11 | Aug 13 – Oct 22 | 60–85 |
| Turnip | — | May 14 | — | Jun 25 – Jul 30 | 40–60 |
| Watercress | Apr 23 | May 14 | May 28 | Jul 9 – Aug 13 | 40–60 |
| Watermelon | Apr 23 | Jun 4 | Jun 11 | Aug 20 – Oct 8 | 70–100 |
| Wax Beans | — | Jun 4 | — | Jul 30 – Sep 24 | 50–65 |
| Winter Melon | Apr 2 | Jun 4 | Jun 11 | Sep 10 – Oct 29 | 90–120 |
| Yard Long Beans | Apr 2 | Jun 4 | Jun 11 | Aug 6 – Sep 17 | 55–80 |
| Zucchini | Apr 23 | Jun 4 | Jun 11 | Jul 30 – Sep 24 | 45–60 |
🍓 Fruits to Grow in Lassen County
27 fruits that grow well in Zone 6b with planting dates for Lassen County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jun 18 | Sep 17 – Dec 31 | 90–180 |
| Aronia | — | — | Jun 18 | — | 730–1095 |
| Blackberries | — | — | Jun 18 | — | 365–730 |
| Blueberries | — | — | Jun 18 | — | 730–1095 |
| Boysenberries | — | — | Jun 18 | — | 365–730 |
| Cantaloupe | — | — | Jun 18 | Aug 27 – Oct 1 | 70–90 |
| Che Fruit | — | — | Jun 18 | — | 1095–1825 |
| Cranberries | — | — | Jun 18 | — | 730–1095 |
| Currants | — | — | Jun 18 | — | 730–1095 |
| Elderberries | — | — | Jun 18 | — | 730–1095 |
| Goji Berries | — | — | Jun 18 | — | 730–1095 |
| Gooseberries | — | — | Jun 18 | — | 730–1095 |
| Grapes | — | — | Jun 18 | — | 730–1095 |
| Ground Cherry | — | — | Jun 18 | Aug 27 – Oct 22 | 65–80 |
| Hardy Kiwi | — | — | Jun 18 | — | 1095–1825 |
| Haskaps | — | — | Jun 18 | — | 730–1095 |
| Honeydew | — | — | Jun 18 | Sep 10 – Oct 22 | 80–110 |
| Jostaberry | — | — | Jun 18 | — | 730–1095 |
| Lingonberries | — | — | Jun 18 | — | 730–1095 |
| Medlar | — | — | Jun 18 | — | 1095–1825 |
| Mulberries | — | — | Jun 18 | — | 730–1825 |
| Pawpaw | — | — | Jun 18 | — | 1095–2555 |
| Persimmon | — | — | Jun 18 | — | 1095–2555 |
| Quince | — | — | Jun 18 | — | 1095–1825 |
| Raspberries | — | — | Jun 18 | — | 365–730 |
| Serviceberries | — | — | Jun 18 | — | 730–1095 |
| Strawberries | — | — | Jun 18 | Sep 17 – Dec 31 | 90–365 |
🌿 Herbs to Grow in Lassen County
38 herbs that grow well in Zone 6b with planting dates for Lassen County.
Show all 38 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 23 | May 14 | May 21 | — | 365–730 |
| Anise | Apr 23 | May 14 | May 21 | Aug 20 – Nov 5 | 90–120 |
| Basil | Apr 9 | Jun 4 | Jun 11 | Aug 6 – Oct 8 | 50–75 |
| Bee Balm | — | — | Jun 4 | Sep 3 – Nov 19 | 90–120 |
| Borage | Apr 23 | May 14 | May 21 | Jul 16 – Sep 3 | 50–60 |
| Caraway | Apr 23 | May 14 | May 21 | — | 365–450 |
| Catnip | — | — | Jun 4 | Aug 6 – Oct 8 | 60–80 |
| Chamomile | Apr 23 | May 14 | May 21 | Jul 23 – Oct 1 | 60–90 |
| Chervil | Apr 23 | May 14 | May 21 | Jul 2 – Sep 3 | 40–60 |
| Chives | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Cilantro | Apr 23 | May 14 | May 21 | Jul 2 – Sep 3 | 40–60 |
| Comfrey | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Cumin | Apr 23 | May 14 | May 21 | Sep 3 – Nov 5 | 100–120 |
| Dill | Apr 23 | May 14 | May 21 | Jul 2 – Sep 3 | 40–60 |
| Echinacea | — | — | Jun 4 | Oct 8 – Dec 17 | 120–180 |
| Epazote | Apr 9 | Jun 4 | Jun 11 | Jul 30 – Sep 24 | 45–60 |
| Fennel (herb) | Apr 23 | May 14 | May 21 | Jul 23 – Oct 1 | 60–90 |
| Feverfew | — | — | Jun 4 | Sep 3 – Nov 19 | 90–120 |
| Garlic Chives | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Horehound | — | — | Jun 4 | Aug 20 – Oct 15 | 75–90 |
| Hyssop | — | — | Jun 4 | Aug 13 – Oct 15 | 70–90 |
| Lavender | — | — | Jun 4 | Sep 3 – Dec 17 | 90–200 |
| Lemon Balm | — | — | Jun 4 | Aug 6 – Sep 24 | 60–70 |
| Lemon Thyme | — | — | Jun 4 | Aug 13 – Oct 15 | 70–90 |
| Lovage | — | — | Jun 4 | Aug 13 – Oct 15 | 70–90 |
| Marjoram | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Mint | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Oregano | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Parsley | Apr 23 | May 14 | May 21 | Jul 23 – Sep 24 | 60–80 |
| Rue | — | — | Jun 4 | Aug 13 – Oct 15 | 70–90 |
| Sage | — | — | Jun 4 | Aug 20 – Oct 15 | 75–90 |
| Savory | — | — | Jun 4 | Jul 30 – Sep 24 | 50–70 |
| Sorrel | Apr 23 | May 14 | May 21 | Jul 2 – Sep 3 | 40–60 |
| Tarragon | — | — | Jun 4 | Aug 6 – Oct 15 | 60–90 |
| Thai Basil | Apr 9 | Jun 4 | Jun 11 | Aug 6 – Oct 8 | 50–75 |
| Thyme | — | — | Jun 4 | Aug 13 – Oct 15 | 70–90 |
| Valerian | — | — | Jun 4 | Oct 8 – Dec 17 | 120–180 |
| Yarrow | — | — | Jun 4 | Sep 3 – Nov 19 | 90–120 |
Monthly Planting Guide for Lassen County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Lassen County.
Frequently Asked Questions
What planting zone is Lassen County, CA?
Lassen 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 Lassen County, CA?
Based on 28 years of NOAA weather station data, the median last spring frost in Lassen County falls around May 28. In 8 out of 10 years, last frost lands between May 3 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 Lassen County, CA?
The median first fall frost in Lassen County arrives around September 29. In cold years it can arrive as early as September 5; in mild years as late as October 25. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Lassen County?
Lassen County has a frost-free growing season of approximately 124 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost.
What is the soil like in Lassen County for gardening?
Lassen County has predominantly Loam soil with a pH range of 6.1–7.5 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Lassen County?
Lassen County has commercial agriculture that includes Almonds, Grapes, Hay, Cattle, Dairy. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Lassen County a good location for home gardening?
Lassen County scores 69/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Lassen County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
