Merced County, CA — Planting Guide
Merced County is in USDA Zone 9a. The average last spring frost is February 24 and the first fall frost is November 28, giving you a growing season of approximately 278 days.
At an elevation of 269 ft, Merced County receives approximately 18.8 in of rainfall annually. Summer highs average 87°F with winter lows around 51°F. The predominant soil type is Loam.
Based on 30 years of NOAA climate station data, the last frost date here varies by 93 days year to year — ranging from January 15 in warm years to April 18 in cold years. The growing season is trending longer by about 1.96 days per decade. Merced County scores 49/100 (Moderate) on the Microclimate Index.
🌡️ Zone
9a (20°F to 25°F min)
❄️ Last Frost
February 24
🍂 First Frost
November 28
📅 Growing Season
278 days
⛰️ Elevation
269 ft
🌧️ Annual Rainfall
18.8 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 | 4.4 in | 10 days | — | None |
| Feb | 4 in | 9 days | 0.3 in | Low |
| Mar | 2.6 in | 7 days | 1.7 in | High |
| Apr | 1.7 in | 4 days | 2.6 in | High |
| May | 0.4 in | 1 days | 3.9 in | Critical |
| Jun | 0.1 in | 0 days | 4.2 in | Critical |
| Jul | 0 in | 0 days | 4.3 in | Critical |
| Aug | 0 in | 0 days | 4.3 in | Critical |
| Sep | 0.2 in | 0 days | 4.1 in | Critical |
| Oct | 0.7 in | 2 days | 3.6 in | Critical |
| Nov | 1.6 in | 6 days | 2.7 in | High |
| Dec | 3.1 in | 7 days | — | None |
Annual total: 18.8 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.
Merced County Soil Profile
Soil Type
Loam
Soil pH
6.8-7.7
Drainage
Well Drained
Frost Risk Probability
Based on 30 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 18 | Dec 16 | 242 days |
| Cautious | Mar 12 | Dec 5 | 268 days |
| Average year | Feb 24 | Nov 28 | 277 days |
| Optimistic | Feb 6 | Nov 22 | 289 days |
| Aggressive (risky) | Jan 15 | Nov 10 | 299 days |
Not very — frost dates can vary by ±93 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 2 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Merced County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Merced 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 Merced County's climate and soil.
County Extension Office
Merced 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 Merced County
Finding local nurseries & garden centers in Merced County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Merced 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 Merced County CA" or "garden center Merced 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 Merced County CA" or check your extension office and local parks department. Facebook groups like "Merced 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
14.5 hours
Summer solstice daylight
Shortest Day
9.5 hours
Winter solstice daylight
Peak Sun Hours
13.7 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 | 9.7 hr | 5.9 hr | Short day |
| February | 10.6 hr | 6.5 hr | Short day |
| March | 11.7 hr | 7.6 hr | Short day |
| April | 13 hr | 9.1 hr | Neutral |
| May | 14 hr | 10.8 hr | Long day |
| June | 14.5 hr | 12.7 hr | Long day |
| July | 14.3 hr | 13.7 hr | Long day |
| August | 13.4 hr | 12 hr | Neutral |
| September | 12.2 hr | 9.9 hr | Neutral |
| October | 11 hr | 7.9 hr | Short day |
| November | 10 hr | 6.2 hr | Short day |
| December | 9.5 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 Apr through Nov.
Best Month to Compost
Apr
Microbial activity peaks when soil is warm.
Active Composting
12 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 53°F | 58°F | ♻️ Active | ~14 weeks |
| Feb | 52°F | 56°F | ♻️ Active | ~14 weeks |
| Mar | 57°F | 61°F | ♻️ Active | ~14 weeks |
| Apr | 68°F | 67°F | 🔥 Peak | ~8 weeks |
| May | 74°F | 73°F | 🔥 Peak | ~8 weeks |
| Jun | 86°F | 82°F | 🔥 Peak | ~8 weeks |
| Jul | 94°F | 88°F | 🔥 Peak | ~8 weeks |
| Aug | 94°F | 90°F | 🔥 Peak | ~8 weeks |
| Sep | 87°F | 87°F | 🔥 Peak | ~8 weeks |
| Oct | 77°F | 81°F | 🔥 Peak | ~8 weeks |
| Nov | 66°F | 73°F | 🔥 Peak | ~8 weeks |
| Dec | 55°F | 61°F | ♻️ Active | ~14 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Merced 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 | Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Whiteflies | High | Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Spider mites | High | May, Jun, Jul, Aug, Sep, Oct |
| Fire ants | Moderate | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Thrips | Moderate | Apr, May, Jun, Jul, Aug |
| Leaf miners | Low | Mar, Apr, May, Jun |
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 Merced County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Mar 1 | Sep 19 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Mar 4 | Oct 3 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Feb 28 | Sep 19 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Jan 25 | Sep 26 | ✓ 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 | Mar 7 | Nov 14 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (4 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Oct 3 | Feb 3 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Sep 29 | Feb 10 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Oct 19 | Feb 3 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Sep 16 | Feb 10 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
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: 11 mph
Fall: 8 mph Winter: 7 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.6/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (590 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
9,369 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
8 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
May, Jun, Jul, Aug, Sep, Oct
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 18.8 inches of rain per year
- A 1,000 sq ft roof can collect roughly 9,369 gallons annually
- Rainwater harvesting is fully legal in your state
- In your dry climate, every drop counts — consider a larger cistern system
- Position collection tanks in shade to reduce evaporation and algae growth
Soil & Growing Conditions in Merced County
Soil Type
Loam
Soil pH 6.8–7.7 · Moderately Well 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
278-day frost-free season
Your long season supports multiple successions and heat-demanding crops like melons, sweet potatoes, and peppers. Plant warm-season crops as soon as soil warms.
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
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
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 Merced County
115 vegetables that grow well in Zone 9a with planting dates for Merced County.
Show all 115 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Jan 27 | Feb 24 | Mar 3 | May 26 – Jun 30 | 80–100 |
| Amaranth | Jan 13 | Feb 24 | Mar 3 | Jun 2 – Jul 21 | 90–120 |
| Artichoke | — | — | Mar 10 | Jul 14 – Sep 22 | 120–180 |
| Arugula | Jan 27 | Feb 3 | Feb 24 | Mar 31 – Jun 2 | 30–50 |
| Asparagus | — | — | Mar 10 | — | 730–1095 |
| Beets | — | Feb 3 | — | Mar 31 – Apr 28 | 50–70 |
| Belgian Endive | Jan 27 | Feb 3 | Feb 24 | Jun 16 – Aug 11 | 110–150 |
| Bitter Melon | Jan 13 | Feb 24 | Mar 3 | May 5 – Jun 16 | 60–90 |
| Black Beans | — | Mar 3 | — | Jun 2 – Jul 21 | 90–120 |
| Bok Choy | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 12 | 40–60 |
| Broccoli | Jan 27 | Feb 3 | Feb 24 | Apr 28 – Jun 9 | 60–90 |
| Broccoli Rabe | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 12 | 40–60 |
| Brussels Sprouts | Jan 27 | Feb 3 | Feb 24 | May 26 – Jul 21 | 90–130 |
| Butternut Squash | Jan 27 | Feb 24 | Mar 3 | Jun 2 – Jul 7 | 85–110 |
| Cabbage | Jan 27 | Feb 3 | Feb 24 | Apr 28 – Jun 23 | 60–100 |
| Calabash | Jan 13 | Feb 24 | Mar 3 | May 26 – Jul 21 | 80–120 |
| Cardoon | — | — | Mar 10 | Jul 14 – Aug 25 | 120–150 |
| Carrots | — | Feb 3 | — | Apr 7 – May 12 | 60–80 |
| Cauliflower | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 23 | 55–100 |
| Celeriac | Jan 27 | Feb 3 | Feb 24 | Jun 9 – Jul 14 | 100–120 |
| Celery | Jan 27 | Feb 3 | Feb 24 | May 19 – Jul 14 | 80–120 |
| Celtuce | Jan 27 | Feb 3 | Feb 24 | Apr 28 – Jun 9 | 60–90 |
| Chard | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 9 | 50–60 |
| Chayote | Jan 13 | Feb 24 | Mar 3 | Jul 7 – Sep 15 | 120–180 |
| Chickpeas | Jan 27 | Feb 3 | Feb 24 | May 19 – Jun 30 | 80–110 |
| Chicory | Jan 27 | Feb 3 | Feb 24 | Apr 28 – Jun 9 | 60–85 |
| Chinese Cabbage | Jan 27 | Feb 3 | Feb 24 | Apr 21 – May 19 | 50–70 |
| Christmas Lima Beans | Jan 13 | Feb 24 | Mar 3 | May 26 – Jun 30 | 80–100 |
| Collard Greens | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 23 | 55–75 |
| Corn | — | Mar 3 | — | May 5 – Jun 30 | 60–100 |
| Cowpeas | — | Mar 3 | — | May 5 – Jun 16 | 60–90 |
| Cress | Jan 27 | Feb 3 | Feb 24 | Mar 10 – Mar 31 | 14–21 |
| Crookneck Squash | Jan 27 | Feb 24 | Mar 3 | Apr 21 – May 19 | 45–60 |
| Crosne | — | Feb 3 | — | Jul 7 – Sep 8 | 150–200 |
| Cucumber | Jan 27 | Feb 24 | Mar 3 | Apr 28 – Jun 23 | 50–70 |
| Daikon | — | Feb 3 | — | Mar 31 – Apr 28 | 50–70 |
| Delicata Squash | Jan 27 | Feb 24 | Mar 3 | May 26 – Jun 30 | 80–100 |
| Edamame | — | Mar 3 | — | May 19 – Jun 30 | 75–100 |
| Eggplant | Jan 13 | Feb 24 | Mar 3 | May 12 – Jul 14 | 65–85 |
| Endive | Jan 27 | Feb 3 | Feb 24 | Apr 14 – May 19 | 45–65 |
| Escarole | Jan 27 | Feb 3 | Feb 24 | Apr 21 – May 19 | 50–70 |
| Fava Beans | Jan 27 | Feb 3 | Feb 24 | May 12 – Jun 23 | 75–100 |
| Fennel | Jan 13 | Feb 24 | Mar 3 | May 5 – Jun 16 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Ginger | Jan 13 | Feb 24 | Mar 3 | Nov 3 – Dec 29 | 240–300 |
| Green Beans | — | Mar 3 | — | Apr 28 – Jun 23 | 50–65 |
| Horseradish | — | — | Mar 10 | Jul 14 – Sep 22 | 120–180 |
| Hot Peppers | Jan 13 | Feb 24 | Mar 3 | May 12 – Aug 18 | 70–120 |
| Hubbard Squash | Jan 27 | Feb 24 | Mar 3 | Jun 16 – Jul 21 | 100–120 |
| Jicama | Jan 13 | Feb 24 | Mar 3 | Jul 7 – Sep 15 | 120–180 |
| Kabocha | Jan 27 | Feb 24 | Mar 3 | Jun 2 – Jun 30 | 85–100 |
| Kai Lan | Jan 27 | Feb 3 | Feb 24 | Apr 14 – May 12 | 45–60 |
| Kale | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 16 | 50–70 |
| Kidney Beans | — | Mar 3 | — | Jun 2 – Jul 7 | 85–110 |
| Kohlrabi | Jan 27 | Feb 3 | Feb 24 | Apr 14 – May 19 | 45–65 |
| Komatsuna | Jan 27 | Feb 3 | Feb 24 | Mar 31 – May 5 | 35–50 |
| Leeks | Jan 27 | Feb 3 | Feb 24 | May 26 – Aug 11 | 90–150 |
| Lentils | Jan 27 | Feb 3 | Feb 24 | May 19 – Jun 30 | 80–110 |
| Lettuce | Jan 27 | Feb 3 | Feb 24 | Mar 31 – Jun 9 | 30–60 |
| Lima Beans | — | Mar 3 | — | May 5 – Jun 16 | 60–90 |
| Loofah | Jan 13 | Feb 24 | Mar 3 | Jun 16 – Aug 18 | 100–150 |
| Luffa | Jan 13 | Feb 24 | Mar 3 | Jun 2 – Aug 18 | 90–150 |
| Mache | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 12 | 40–60 |
| Malabar Spinach | Jan 13 | Feb 24 | Mar 3 | Apr 28 – May 26 | 55–70 |
| Melon | Jan 27 | Feb 24 | Mar 3 | May 12 – Jun 30 | 70–100 |
| Microgreens | Jan 27 | Feb 3 | Feb 24 | Mar 3 – Mar 31 | 7–21 |
| Mitsuba | Jan 27 | Feb 3 | Feb 17 | Apr 14 – Jun 9 | 50–70 |
| Mizuna | Jan 27 | Feb 3 | Feb 24 | Mar 31 – Apr 28 | 30–45 |
| Mustard Greens | Jan 27 | Feb 3 | Feb 24 | Mar 31 – Jun 2 | 30–50 |
| Napa Cabbage | Jan 27 | Feb 3 | Feb 24 | Apr 21 – May 26 | 55–75 |
| New Zealand Spinach | Jan 13 | Feb 24 | Mar 3 | Apr 28 – May 26 | 55–70 |
| Okra | Jan 13 | Feb 24 | Mar 3 | Apr 28 – Jun 23 | 50–65 |
| Onion | Jan 27 | Feb 3 | Feb 24 | May 26 – Jul 14 | 90–120 |
| Pac Choi | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 5 | 40–55 |
| Parsnip | — | Feb 3 | — | May 19 – Jun 30 | 100–130 |
| Patty Pan Squash | Jan 27 | Feb 24 | Mar 3 | Apr 21 – May 19 | 45–60 |
| Peas | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 16 | 55–70 |
| Peppers | Jan 13 | Feb 24 | Mar 3 | May 5 – Jul 14 | 60–90 |
| Pole Beans | Jan 13 | Feb 24 | Mar 3 | Apr 28 – Jun 23 | 55–70 |
| Potatoes | Jan 13 | Feb 24 | Mar 3 | May 12 – Jul 21 | 70–120 |
| Pumpkin | Jan 27 | Feb 24 | Mar 3 | Jun 2 – Jul 21 | 85–120 |
| Purslane | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 12 | 40–60 |
| Radicchio | Jan 27 | Feb 3 | Feb 24 | Apr 28 – Jun 2 | 60–80 |
| Radish | — | Feb 3 | — | Mar 3 – Mar 24 | 22–35 |
| Romanesco | Jan 27 | Feb 3 | Feb 24 | May 12 – Jun 23 | 75–100 |
| Rutabaga | — | Feb 3 | — | Apr 28 – Jun 2 | 80–100 |
| Salsify | — | Feb 3 | — | May 19 – Jun 30 | 100–130 |
| Savoy Cabbage | Jan 27 | Feb 3 | Feb 24 | May 5 – Jun 30 | 70–110 |
| Scallions | Jan 27 | Feb 3 | Feb 24 | Apr 21 – May 19 | 50–70 |
| Scarlet Runner Beans | Jan 13 | Feb 24 | Mar 3 | May 5 – Jun 9 | 60–80 |
| Shallot | Jan 27 | Feb 3 | Feb 24 | May 26 – Jul 14 | 90–120 |
| Shiso | Jan 13 | Mar 3 | Mar 3 | Apr 28 – Jun 23 | 50–70 |
| Snap Peas | Jan 13 | Feb 24 | Mar 3 | Apr 28 – Jun 23 | 55–70 |
| Snow Peas | Jan 27 | Feb 3 | Feb 24 | Apr 21 – Jun 16 | 50–65 |
| Soybeans | — | Mar 3 | — | May 26 – Jul 21 | 80–120 |
| Spaghetti Squash | Jan 27 | Feb 24 | Mar 3 | Jun 2 – Jun 30 | 85–100 |
| Spinach | Jan 27 | Feb 3 | Feb 24 | Mar 31 – Jun 2 | 35–50 |
| Squash (Summer) | Jan 27 | Feb 24 | Mar 3 | Apr 21 – Jun 23 | 45–65 |
| Squash (Winter) | Jan 27 | Feb 24 | Mar 3 | May 26 – Jul 21 | 80–120 |
| Sunchoke | — | — | Mar 10 | Jun 30 – Aug 25 | 110–150 |
| Sunflower | Jan 13 | Feb 24 | Mar 3 | May 12 – Jun 30 | 70–100 |
| Sweet Corn | — | Mar 3 | — | May 5 – Jun 16 | 60–90 |
| Sweet Potatoes | Jan 13 | Feb 24 | Mar 3 | Jun 2 – Jul 21 | 90–120 |
| Tatsoi | Jan 27 | Feb 3 | Feb 24 | Mar 31 – May 5 | 35–50 |
| Tomatillo | Jan 13 | Feb 24 | Mar 3 | May 5 – Jul 14 | 60–85 |
| Tomatoes | Jan 13 | Feb 24 | Mar 3 | May 5 – Jul 14 | 60–85 |
| Turmeric | Jan 13 | Feb 24 | Mar 3 | Nov 3 – Dec 29 | 240–300 |
| Turnip | — | Feb 3 | — | Mar 17 – Apr 21 | 40–60 |
| Watercress | Jan 27 | Feb 3 | Feb 24 | Apr 7 – May 12 | 40–60 |
| Watermelon | Jan 27 | Feb 24 | Mar 3 | May 12 – Jun 30 | 70–100 |
| Wax Beans | — | Mar 3 | — | Apr 28 – Jun 23 | 50–65 |
| Winter Melon | Jan 13 | Feb 24 | Mar 3 | Jun 2 – Jul 21 | 90–120 |
| Yam | Jan 13 | Feb 24 | Mar 3 | Sep 1 – Dec 29 | 180–330 |
| Yard Long Beans | Jan 13 | Feb 24 | Mar 3 | Apr 28 – Jun 9 | 55–80 |
| Zucchini | Jan 27 | Feb 24 | Mar 3 | Apr 21 – Jun 16 | 45–60 |
🍓 Fruits to Grow in Merced County
24 fruits that grow well in Zone 9a with planting dates for Merced County.
Show all 24 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Mar 10 | Jun 9 – Sep 22 | 90–180 |
| Blackberries | — | — | Mar 10 | — | 365–730 |
| Boysenberries | — | — | Mar 10 | — | 365–730 |
| Cantaloupe | — | — | Mar 10 | May 19 – Jun 23 | 70–90 |
| Che Fruit | — | — | Mar 10 | — | 1095–1825 |
| Dragon Fruit | — | — | Mar 10 | — | 365–730 |
| Elderberries | — | — | Mar 10 | — | 730–1095 |
| Figs | — | — | Mar 10 | — | 730–1825 |
| Goji Berries | — | — | Mar 10 | — | 730–1095 |
| Grapes | — | — | Mar 10 | — | 730–1095 |
| Ground Cherry | — | — | Mar 10 | May 19 – Jul 14 | 65–80 |
| Guava | — | — | Mar 10 | — | 365–730 |
| Honeydew | — | — | Mar 10 | Jun 2 – Jul 14 | 80–110 |
| Kiwi | — | — | Mar 10 | — | 1095–1825 |
| Loquat | — | — | Mar 10 | — | 730–1825 |
| Mulberries | — | — | Mar 10 | — | 730–1825 |
| Passion Fruit | — | — | Mar 10 | — | 365–545 |
| Pawpaw | — | — | Mar 10 | — | 1095–2555 |
| Persimmon | — | — | Mar 10 | — | 1095–2555 |
| Pomegranate | — | — | Mar 10 | — | 730–1095 |
| Quince | — | — | Mar 10 | — | 1095–1825 |
| Raspberries | — | — | Mar 10 | — | 365–730 |
| Serviceberries | — | — | Mar 10 | — | 730–1095 |
| Strawberries | — | — | Mar 10 | Jun 9 – Jan 5 | 90–365 |
🌿 Herbs to Grow in Merced County
40 herbs that grow well in Zone 9a with planting dates for Merced County.
Show all 40 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Anise | Jan 27 | Feb 3 | Feb 17 | May 19 – Aug 4 | 90–120 |
| Basil | Jan 13 | Mar 3 | Mar 3 | Apr 28 – Jun 30 | 50–75 |
| Bee Balm | — | — | Mar 3 | Jun 2 – Aug 18 | 90–120 |
| Borage | Jan 27 | Feb 3 | Feb 17 | Apr 14 – Jun 2 | 50–60 |
| Caraway | Jan 27 | Feb 3 | Feb 17 | — | 365–450 |
| Catnip | — | — | Mar 3 | May 5 – Jul 7 | 60–80 |
| Chamomile | Jan 27 | Feb 3 | Feb 17 | Apr 21 – Jun 30 | 60–90 |
| Chervil | Jan 27 | Feb 3 | Feb 17 | Mar 31 – Jun 2 | 40–60 |
| Chives | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Cilantro | Jan 27 | Feb 3 | Feb 17 | Mar 31 – Jun 2 | 40–60 |
| Comfrey | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Cumin | Jan 27 | Feb 3 | Feb 17 | Jun 2 – Aug 4 | 100–120 |
| Dill | Jan 27 | Feb 3 | Feb 17 | Mar 31 – Jun 2 | 40–60 |
| Echinacea | — | — | Mar 3 | Jul 7 – Oct 13 | 120–180 |
| Epazote | Jan 13 | Mar 3 | Mar 3 | Apr 21 – Jun 16 | 45–60 |
| Fennel (herb) | Jan 27 | Feb 3 | Feb 17 | Apr 21 – Jun 30 | 60–90 |
| Feverfew | — | — | Mar 3 | Jun 2 – Aug 18 | 90–120 |
| Garlic Chives | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Horehound | — | — | Mar 3 | May 19 – Jul 14 | 75–90 |
| Hyssop | — | — | Mar 3 | May 12 – Jul 14 | 70–90 |
| Lavender | — | — | Mar 3 | Jun 2 – Nov 3 | 90–200 |
| Lemon Balm | — | — | Mar 3 | May 5 – Jun 23 | 60–70 |
| Lemon Thyme | — | — | Mar 3 | May 12 – Jul 14 | 70–90 |
| Lemon Verbena | Jan 13 | Mar 3 | Mar 3 | May 5 – Jul 14 | 60–90 |
| Lemongrass | Jan 13 | Mar 3 | Mar 3 | May 19 – Aug 18 | 75–120 |
| Marjoram | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Mint | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Oregano | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Parsley | Jan 27 | Feb 3 | Feb 17 | Apr 21 – Jun 23 | 60–80 |
| Rosemary | — | — | Mar 3 | May 26 – Oct 13 | 80–180 |
| Rue | — | — | Mar 3 | May 12 – Jul 14 | 70–90 |
| Sage | — | — | Mar 3 | May 19 – Jul 14 | 75–90 |
| Savory | — | — | Mar 3 | Apr 28 – Jun 23 | 50–70 |
| Sorrel | Jan 27 | Feb 3 | Feb 17 | Mar 31 – Jun 2 | 40–60 |
| Stevia | Jan 13 | Mar 3 | Mar 3 | May 5 – Jul 14 | 60–90 |
| Tarragon | — | — | Mar 3 | May 5 – Jul 14 | 60–90 |
| Thai Basil | Jan 13 | Mar 3 | Mar 3 | Apr 28 – Jun 30 | 50–75 |
| Thyme | — | — | Mar 3 | May 12 – Jul 14 | 70–90 |
| Valerian | — | — | Mar 3 | Jul 7 – Oct 13 | 120–180 |
| Yarrow | — | — | Mar 3 | Jun 2 – Aug 18 | 90–120 |
Monthly Planting Guide for Merced County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Merced County.
Frequently Asked Questions
What planting zone is Merced County, CA?
Merced County is in USDA Hardiness Zone 9a. 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 Merced County, CA?
Based on 30 years of NOAA weather station data, the median last spring frost in Merced County falls around February 24. In 8 out of 10 years, last frost lands between January 15 and April 18 — a 93-day window of variability. Use April 18 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Merced County, CA?
The median first fall frost in Merced County arrives around November 28. In cold years it can arrive as early as November 10; in mild years as late as December 16. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Merced County?
Merced County has a frost-free growing season of approximately 278 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 1.96 days per decade.
What is the soil like in Merced County for gardening?
Merced County has predominantly Loam soil with a pH range of 6.8–7.7 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Merced County?
Merced County has commercial agriculture that includes Grapes, Almonds, Dairy, Rice, Tomatoes. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Merced County a good location for home gardening?
Merced County scores 49/100 (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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Merced County gardeners in Zone 9a 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.
