Mendocino County, CA — Planting Guide
Mendocino County is in USDA Zone 8b. The average last spring frost is March 23 and the first fall frost is November 9, giving you a growing season of approximately 231 days.
At an elevation of 180 ft, Mendocino County receives approximately 24 in of rainfall annually. Summer highs average 87°F with winter lows around 41°F. The predominant soil type is Sandy Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 73 days year to year — ranging from February 5 in warm years to April 19 in cold years. The growing season is trending longer by about 8.15 days per decade. Mendocino County scores 58/100 (Moderate) on the Microclimate Index.
🌡️ Zone
8b (15°F to 20°F min)
❄️ Last Frost
March 23
🍂 First Frost
November 9
📅 Growing Season
231 days
⛰️ Elevation
180 ft
🌧️ Annual Rainfall
24 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 | 5.2 in | 11 days | — | None |
| Feb | 4.6 in | 9 days | — | Low |
| Mar | 3.7 in | 7 days | 0.6 in | Moderate |
| Apr | 1.9 in | 4 days | 2.4 in | High |
| May | 0.6 in | 1 days | 3.7 in | Critical |
| Jun | 0.2 in | 0 days | 4.1 in | Critical |
| Jul | 0 in | 0 days | 4.3 in | Critical |
| Aug | 0 in | 0 days | 4.3 in | Critical |
| Sep | 0.2 in | 0 days | 4.1 in | Critical |
| Oct | 1 in | 2 days | 3.3 in | Critical |
| Nov | 2.6 in | 6 days | 1.7 in | High |
| Dec | 3.9 in | 10 days | — | None |
Annual total: 23.9 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.
Mendocino County Soil Profile
Soil Type
Sandy Loam
Soil pH
6.1-7.2
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) | Apr 19 | Dec 4 | 229 days |
| Cautious | Apr 6 | Nov 21 | 229 days |
| Average year | Mar 23 | Nov 9 | 231 days |
| Optimistic | Mar 1 | Nov 2 | 246 days |
| Aggressive (risky) | Feb 5 | Oct 11 | 248 days |
Not very — frost dates can vary by ±73 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 8.2 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Mendocino County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Mendocino 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 Mendocino County's climate and soil.
County Extension Office
Mendocino 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 Mendocino County
Finding local nurseries & garden centers in Mendocino County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Mendocino 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 Mendocino County CA" or "garden center Mendocino 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 Mendocino County CA" or check your extension office and local parks department. Facebook groups like "Mendocino 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 6 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
14.8 hours
Summer solstice daylight
Shortest Day
9.2 hours
Winter solstice daylight
Peak Sun Hours
13.3 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 | 9.5 hr | 5.6 hr | Short day |
| February | 10.5 hr | 6.5 hr | Short day |
| March | 11.7 hr | 7.3 hr | Short day |
| April | 13 hr | 9.2 hr | Neutral |
| May | 14.2 hr | 11.1 hr | Long day |
| June | 14.8 hr | 12.6 hr | Long day |
| July | 14.5 hr | 13.3 hr | Long day |
| August | 13.6 hr | 11.7 hr | Neutral |
| September | 12.2 hr | 10.2 hr | Neutral |
| October | 10.9 hr | 7.9 hr | Short day |
| November | 9.8 hr | 6.4 hr | Short day |
| December | 9.2 hr | 5 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 Apr through Nov.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
9 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 45°F | 52°F | 🐢 Slow | ~24 weeks |
| Feb | 44°F | 50°F | 🐢 Slow | ~24 weeks |
| Mar | 51°F | 54°F | ♻️ Active | ~14 weeks |
| Apr | 61°F | 60°F | ♻️ Active | ~14 weeks |
| May | 71°F | 68°F | 🔥 Peak | ~8 weeks |
| Jun | 84°F | 77°F | 🔥 Peak | ~8 weeks |
| Jul | 88°F | 84°F | 🔥 Peak | ~8 weeks |
| Aug | 90°F | 86°F | 🔥 Peak | ~8 weeks |
| Sep | 83°F | 82°F | 🔥 Peak | ~8 weeks |
| Oct | 73°F | 76°F | 🔥 Peak | ~8 weeks |
| Nov | 62°F | 67°F | ♻️ Active | ~14 weeks |
| Dec | 49°F | 58°F | 🐢 Slow | ~24 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Mendocino County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
High — expect multiple pest generations. Preventative measures essential.
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 | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Squash vine borers | Moderate | May, Jun, Jul |
| Stink bugs | High | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Whiteflies | Moderate | May, Jun, Jul, Aug, Sep, Oct |
| Spider mites | Moderate | Jun, Jul, Aug, Sep |
| Fire ants | Low | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
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 Mendocino 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 28 | Mar 2 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Sep 15 | Mar 2 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 19 | Mar 2 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 15 | Mar 2 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 27 | Mar 9 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Aug 11 | Mar 9 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Aug 7 | Mar 2 | — | Erosion control, weed suppression, good biomass |
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Mar 24 | Sep 7 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 3 | Sep 14 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Mar 31 | Sep 7 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Feb 20 | Sep 7 | ✓ 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 | Apr 12 | Oct 19 | — | 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: 12 mph Summer: 12 mph
Fall: 7 mph Winter: 9 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.8/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (404 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
11,911 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 23.9 inches of rain per year
- A 1,000 sq ft roof can collect roughly 11,911 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 Mendocino County
Soil Type
Sandy Loam
Soil pH 6.1–7.2 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 1.5/10
Mendocino County has very low drought pressure. Natural rainfall usually meets garden needs — water only during extended dry spells.
Season Tips
231-day frost-free season
Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.
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
Retain moisture and nutrients in sandy soils with expanded vermiculite.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
🥬 Vegetables to Grow in Mendocino County
115 vegetables that grow well in Zone 8b with planting dates for Mendocino County.
Show all 115 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Feb 23 | Mar 30 | Apr 6 | Jun 29 – Aug 3 | 80–100 |
| Amaranth | Feb 2 | Mar 30 | Apr 6 | Jul 6 – Aug 24 | 90–120 |
| Artichoke | — | — | Apr 6 | Aug 10 – Oct 19 | 120–180 |
| Arugula | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jun 29 | 30–50 |
| Asparagus | — | — | Apr 6 | — | 730–1095 |
| Beets | — | Mar 9 | — | May 4 – Jun 1 | 50–70 |
| Belgian Endive | Feb 16 | Mar 9 | Mar 23 | Jul 13 – Sep 7 | 110–150 |
| Bitter Melon | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Jul 20 | 60–90 |
| Black Beans | — | Mar 30 | — | Jun 29 – Aug 17 | 90–120 |
| Bok Choy | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 8 | 40–60 |
| Broccoli | Feb 16 | Mar 9 | Mar 23 | May 25 – Jul 6 | 60–90 |
| Broccoli Rabe | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 8 | 40–60 |
| Brussels Sprouts | Feb 16 | Mar 9 | Mar 23 | Jun 22 – Aug 17 | 90–130 |
| Butternut Squash | Feb 23 | Mar 30 | Apr 6 | Jul 6 – Aug 10 | 85–110 |
| Cabbage | Feb 16 | Mar 9 | Mar 23 | May 25 – Jul 20 | 60–100 |
| Calabash | Feb 2 | Mar 30 | Apr 6 | Jun 29 – Aug 24 | 80–120 |
| Cardoon | — | — | Apr 6 | Aug 10 – Sep 21 | 120–150 |
| Carrots | — | Mar 9 | — | May 11 – Jun 15 | 60–80 |
| Cauliflower | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 20 | 55–100 |
| Celeriac | Feb 16 | Mar 9 | Mar 23 | Jul 6 – Aug 10 | 100–120 |
| Celery | Feb 16 | Mar 9 | Mar 23 | Jun 15 – Aug 10 | 80–120 |
| Celtuce | Feb 16 | Mar 9 | Mar 23 | May 25 – Jul 6 | 60–90 |
| Chard | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 6 | 50–60 |
| Chayote | Feb 2 | Mar 30 | Apr 6 | Aug 10 – Oct 19 | 120–180 |
| Chickpeas | Feb 16 | Mar 9 | Mar 23 | Jun 15 – Jul 27 | 80–110 |
| Chicory | Feb 16 | Mar 9 | Mar 23 | May 25 – Jul 6 | 60–85 |
| Chinese Cabbage | Feb 16 | Mar 9 | Mar 23 | May 18 – Jun 15 | 50–70 |
| Christmas Lima Beans | Feb 2 | Mar 30 | Apr 6 | Jun 29 – Aug 3 | 80–100 |
| Collard Greens | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 20 | 55–75 |
| Corn | — | Mar 30 | — | Jun 1 – Jul 27 | 60–100 |
| Cowpeas | — | Mar 30 | — | Jun 1 – Jul 13 | 60–90 |
| Cress | Feb 16 | Mar 9 | Mar 23 | Apr 6 – Apr 27 | 14–21 |
| Crookneck Squash | Feb 23 | Mar 30 | Apr 6 | May 25 – Jun 22 | 45–60 |
| Crosne | — | Mar 9 | — | Aug 10 – Oct 12 | 150–200 |
| Cucumber | Feb 23 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–70 |
| Daikon | — | Mar 9 | — | May 4 – Jun 1 | 50–70 |
| Delicata Squash | Feb 23 | Mar 30 | Apr 6 | Jun 29 – Aug 3 | 80–100 |
| Edamame | — | Mar 30 | — | Jun 15 – Jul 27 | 75–100 |
| Eggplant | Jan 19 | Mar 30 | Apr 6 | Jun 15 – Aug 17 | 65–85 |
| Endive | Feb 16 | Mar 9 | Mar 23 | May 11 – Jun 15 | 45–65 |
| Escarole | Feb 16 | Mar 9 | Mar 23 | May 18 – Jun 15 | 50–70 |
| Fava Beans | Feb 16 | Mar 9 | Mar 23 | Jun 8 – Jul 20 | 75–100 |
| Fennel | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Jul 20 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Ginger | Feb 2 | Mar 30 | Apr 6 | Dec 7 – Dec 21 | 240–300 |
| Green Beans | — | Mar 30 | — | May 25 – Jul 20 | 50–65 |
| Horseradish | — | — | Apr 6 | Aug 10 – Oct 19 | 120–180 |
| Hot Peppers | Jan 19 | Mar 30 | Apr 6 | Jun 15 – Sep 21 | 70–120 |
| Hubbard Squash | Feb 23 | Mar 30 | Apr 6 | Jul 20 – Aug 24 | 100–120 |
| Jicama | Feb 2 | Mar 30 | Apr 6 | Aug 10 – Oct 19 | 120–180 |
| Kabocha | Feb 23 | Mar 30 | Apr 6 | Jul 6 – Aug 3 | 85–100 |
| Kai Lan | Feb 16 | Mar 9 | Mar 23 | May 11 – Jun 8 | 45–60 |
| Kale | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 13 | 50–70 |
| Kidney Beans | — | Mar 30 | — | Jun 29 – Aug 3 | 85–110 |
| Kohlrabi | Feb 16 | Mar 9 | Mar 23 | May 11 – Jun 15 | 45–65 |
| Komatsuna | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jun 1 | 35–50 |
| Leeks | Feb 16 | Mar 9 | Mar 23 | Jun 22 – Sep 7 | 90–150 |
| Lentils | Feb 16 | Mar 9 | Mar 23 | Jun 15 – Jul 27 | 80–110 |
| Lettuce | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jul 6 | 30–60 |
| Lima Beans | — | Mar 30 | — | Jun 1 – Jul 13 | 60–90 |
| Loofah | Feb 2 | Mar 30 | Apr 6 | Jul 20 – Sep 21 | 100–150 |
| Luffa | Feb 2 | Mar 30 | Apr 6 | Jul 6 – Sep 21 | 90–150 |
| Mache | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 8 | 40–60 |
| Malabar Spinach | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jun 29 | 55–70 |
| Melon | Feb 23 | Mar 30 | Apr 6 | Jun 15 – Aug 3 | 70–100 |
| Microgreens | Feb 16 | Mar 9 | Mar 23 | Mar 30 – Apr 27 | 7–21 |
| Mitsuba | Feb 16 | Mar 9 | Mar 16 | May 11 – Jul 6 | 50–70 |
| Mizuna | Feb 16 | Mar 9 | Mar 23 | Apr 27 – May 25 | 30–45 |
| Mustard Greens | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jun 29 | 30–50 |
| Napa Cabbage | Feb 16 | Mar 9 | Mar 23 | May 18 – Jun 22 | 55–75 |
| New Zealand Spinach | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jun 29 | 55–70 |
| Okra | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–65 |
| Onion | Feb 16 | Mar 9 | Mar 23 | Jun 22 – Aug 10 | 90–120 |
| Pac Choi | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 1 | 40–55 |
| Parsnip | — | Mar 9 | — | Jun 22 – Aug 3 | 100–130 |
| Patty Pan Squash | Feb 23 | Mar 30 | Apr 6 | May 25 – Jun 22 | 45–60 |
| Peas | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 13 | 55–70 |
| Peppers | Jan 19 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Pole Beans | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 55–70 |
| Potatoes | Feb 2 | Mar 30 | Apr 6 | Jun 15 – Aug 24 | 70–120 |
| Pumpkin | Feb 23 | Mar 30 | Apr 6 | Jul 6 – Aug 24 | 85–120 |
| Purslane | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 8 | 40–60 |
| Radicchio | Feb 16 | Mar 9 | Mar 23 | May 25 – Jun 29 | 60–80 |
| Radish | — | Mar 9 | — | Apr 6 – Apr 27 | 22–35 |
| Rhubarb | — | — | Apr 13 | — | 365–730 |
| Romanesco | Feb 16 | Mar 9 | Mar 23 | Jun 8 – Jul 20 | 75–100 |
| Rutabaga | — | Mar 9 | — | Jun 1 – Jul 6 | 80–100 |
| Salsify | — | Mar 9 | — | Jun 22 – Aug 3 | 100–130 |
| Savoy Cabbage | Feb 16 | Mar 9 | Mar 23 | Jun 1 – Jul 27 | 70–110 |
| Scallions | Feb 16 | Mar 9 | Mar 23 | May 18 – Jun 15 | 50–70 |
| Scarlet Runner Beans | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Jul 13 | 60–80 |
| Shallot | Feb 16 | Mar 9 | Mar 23 | Jun 22 – Aug 10 | 90–120 |
| Shiso | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–70 |
| Snap Peas | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 55–70 |
| Snow Peas | Feb 16 | Mar 9 | Mar 23 | May 18 – Jul 13 | 50–65 |
| Soybeans | — | Mar 30 | — | Jun 22 – Aug 17 | 80–120 |
| Spaghetti Squash | Feb 23 | Mar 30 | Apr 6 | Jul 6 – Aug 3 | 85–100 |
| Spinach | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jun 29 | 35–50 |
| Squash (Summer) | Feb 23 | Mar 30 | Apr 6 | May 25 – Jul 27 | 45–65 |
| Squash (Winter) | Feb 23 | Mar 30 | Apr 6 | Jun 29 – Aug 24 | 80–120 |
| Sunchoke | — | — | Apr 6 | Jul 27 – Sep 21 | 110–150 |
| Sunflower | Feb 2 | Mar 30 | Apr 6 | Jun 15 – Aug 3 | 70–100 |
| Sweet Corn | — | Mar 30 | — | Jun 1 – Jul 13 | 60–90 |
| Sweet Potatoes | Feb 2 | Mar 30 | Apr 6 | Jul 6 – Aug 24 | 90–120 |
| Tatsoi | Feb 16 | Mar 9 | Mar 23 | Apr 27 – Jun 1 | 35–50 |
| Tomatillo | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–85 |
| Tomatoes | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–85 |
| Turmeric | Feb 2 | Mar 30 | Apr 6 | Dec 7 – Dec 21 | 240–300 |
| Turnip | — | Mar 9 | — | Apr 20 – May 25 | 40–60 |
| Watercress | Feb 16 | Mar 9 | Mar 23 | May 4 – Jun 8 | 40–60 |
| Watermelon | Feb 23 | Mar 30 | Apr 6 | Jun 15 – Aug 3 | 70–100 |
| Wax Beans | — | Mar 30 | — | May 25 – Jul 20 | 50–65 |
| Winter Melon | Feb 2 | Mar 30 | Apr 6 | Jul 6 – Aug 24 | 90–120 |
| Yard Long Beans | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Jul 13 | 55–80 |
| Zucchini | Feb 23 | Mar 30 | Apr 6 | May 25 – Jul 20 | 45–60 |
🍓 Fruits to Grow in Mendocino County
27 fruits that grow well in Zone 8b with planting dates for Mendocino County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Apr 13 | Jul 13 – Oct 26 | 90–180 |
| Aronia | — | — | Apr 13 | — | 730–1095 |
| Blackberries | — | — | Apr 13 | — | 365–730 |
| Blueberries | — | — | Apr 13 | — | 730–1095 |
| Boysenberries | — | — | Apr 13 | — | 365–730 |
| Cantaloupe | — | — | Apr 13 | Jun 22 – Jul 27 | 70–90 |
| Che Fruit | — | — | Apr 13 | — | 1095–1825 |
| Elderberries | — | — | Apr 13 | — | 730–1095 |
| Figs | — | — | Apr 13 | — | 730–1825 |
| Goji Berries | — | — | Apr 13 | — | 730–1095 |
| Gooseberries | — | — | Apr 13 | — | 730–1095 |
| Grapes | — | — | Apr 13 | — | 730–1095 |
| Ground Cherry | — | — | Apr 13 | Jun 22 – Aug 17 | 65–80 |
| Hardy Kiwi | — | — | Apr 13 | — | 1095–1825 |
| Honeydew | — | — | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Jostaberry | — | — | Apr 13 | — | 730–1095 |
| Kiwi | — | — | Apr 13 | — | 1095–1825 |
| Loquat | — | — | Apr 13 | — | 730–1825 |
| Medlar | — | — | Apr 13 | — | 1095–1825 |
| Mulberries | — | — | Apr 13 | — | 730–1825 |
| Pawpaw | — | — | Apr 13 | — | 1095–2555 |
| Persimmon | — | — | Apr 13 | — | 1095–2555 |
| Pomegranate | — | — | Apr 13 | — | 730–1095 |
| Quince | — | — | Apr 13 | — | 1095–1825 |
| Raspberries | — | — | Apr 13 | — | 365–730 |
| Serviceberries | — | — | Apr 13 | — | 730–1095 |
| Strawberries | — | — | Apr 13 | Jul 13 – Dec 28 | 90–365 |
🌿 Herbs to Grow in Mendocino County
42 herbs that grow well in Zone 8b with planting dates for Mendocino County.
Show all 42 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Feb 16 | Mar 9 | Mar 16 | — | 365–730 |
| Anise | Feb 16 | Mar 9 | Mar 16 | Jun 15 – Aug 31 | 90–120 |
| Basil | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Aug 3 | 50–75 |
| Bee Balm | — | — | Mar 30 | Jun 29 – Sep 14 | 90–120 |
| Borage | Feb 16 | Mar 9 | Mar 16 | May 11 – Jun 29 | 50–60 |
| Caraway | Feb 16 | Mar 9 | Mar 16 | — | 365–450 |
| Catnip | — | — | Mar 30 | Jun 1 – Aug 3 | 60–80 |
| Chamomile | Feb 16 | Mar 9 | Mar 16 | May 18 – Jul 27 | 60–90 |
| Chervil | Feb 16 | Mar 9 | Mar 16 | Apr 27 – Jun 29 | 40–60 |
| Chives | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Cilantro | Feb 16 | Mar 9 | Mar 16 | Apr 27 – Jun 29 | 40–60 |
| Comfrey | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Cumin | Feb 16 | Mar 9 | Mar 16 | Jun 29 – Aug 31 | 100–120 |
| Dill | Feb 16 | Mar 9 | Mar 16 | Apr 27 – Jun 29 | 40–60 |
| Echinacea | — | — | Mar 30 | Aug 3 – Nov 9 | 120–180 |
| Epazote | Feb 2 | Mar 30 | Apr 6 | May 25 – Jul 20 | 45–60 |
| Fennel (herb) | Feb 16 | Mar 9 | Mar 16 | May 18 – Jul 27 | 60–90 |
| Feverfew | — | — | Mar 30 | Jun 29 – Sep 14 | 90–120 |
| Garlic Chives | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Horehound | — | — | Mar 30 | Jun 15 – Aug 10 | 75–90 |
| Hyssop | — | — | Mar 30 | Jun 8 – Aug 10 | 70–90 |
| Lavender | — | — | Mar 30 | Jun 29 – Nov 30 | 90–200 |
| Lemon Balm | — | — | Mar 30 | Jun 1 – Jul 20 | 60–70 |
| Lemon Thyme | — | — | Mar 30 | Jun 8 – Aug 10 | 70–90 |
| Lemon Verbena | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Lemongrass | Feb 2 | Mar 30 | Apr 6 | Jun 22 – Sep 21 | 75–120 |
| Lovage | — | — | Mar 30 | Jun 8 – Aug 10 | 70–90 |
| Marjoram | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Mint | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Oregano | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Parsley | Feb 16 | Mar 9 | Mar 16 | May 18 – Jul 20 | 60–80 |
| Rosemary | — | — | Mar 30 | Jun 22 – Nov 9 | 80–180 |
| Rue | — | — | Mar 30 | Jun 8 – Aug 10 | 70–90 |
| Sage | — | — | Mar 30 | Jun 15 – Aug 10 | 75–90 |
| Savory | — | — | Mar 30 | May 25 – Jul 20 | 50–70 |
| Sorrel | Feb 16 | Mar 9 | Mar 16 | Apr 27 – Jun 29 | 40–60 |
| Stevia | Feb 2 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Tarragon | — | — | Mar 30 | Jun 1 – Aug 10 | 60–90 |
| Thai Basil | Feb 2 | Mar 30 | Apr 6 | Jun 1 – Aug 3 | 50–75 |
| Thyme | — | — | Mar 30 | Jun 8 – Aug 10 | 70–90 |
| Valerian | — | — | Mar 30 | Aug 3 – Nov 9 | 120–180 |
| Yarrow | — | — | Mar 30 | Jun 29 – Sep 14 | 90–120 |
Monthly Planting Guide for Mendocino County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Mendocino County.
Frequently Asked Questions
What planting zone is Mendocino County, CA?
Mendocino County is in USDA Hardiness Zone 8b. 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 Mendocino County, CA?
Based on 31 years of NOAA weather station data, the median last spring frost in Mendocino County falls around March 23. In 8 out of 10 years, last frost lands between February 5 and April 19 — a 73-day window of variability. Use April 19 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Mendocino County, CA?
The median first fall frost in Mendocino County arrives around November 9. In cold years it can arrive as early as October 11; in mild years as late as December 4. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Mendocino County?
Mendocino County has a frost-free growing season of approximately 231 days. This long season supports multiple succession plantings and warm-season crops that need extended heat, like sweet potatoes and melons. Climate records show the growing season is trending longer by about 8.15 days per decade.
What is the soil like in Mendocino County for gardening?
Mendocino County has predominantly Sandy Loam soil with a pH range of 6.1–7.2 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Mendocino County?
Mendocino County has commercial agriculture that includes Almonds, Grapes, Dairy, Tomatoes, Lettuce. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Mendocino County a good location for home gardening?
Mendocino County scores 58/100 (Moderate) 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 Mendocino County gardeners in Zone 8b 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.
