Orange County, CA — Planting Guide
Orange County is in USDA Zone 10a. The average last spring frost is February 13 and the first fall frost is December 11, giving you a growing season of approximately 302 days.
At an elevation of 405 ft, Orange County receives approximately 13.8 in of rainfall annually. Summer highs average 88°F with winter lows around 55°F. The predominant soil type is Loam.
Based on 24 years of NOAA climate station data, the last frost date here varies by 83 days year to year — ranging from January 10 in warm years to April 2 in cold years. The growing season is trending longer by about 18.61 days per decade. Orange County scores 38/100 (Challenging) on the Microclimate Index.
🌡️ Zone
10a (30°F to 35°F min)
❄️ Last Frost
February 13
🍂 First Frost
December 11
📅 Growing Season
302 days
⛰️ Elevation
405 ft
🌧️ Annual Rainfall
13.8 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 | 2.4 in | 10 days | 1.9 in | High |
| Feb | 2.6 in | 9 days | 1.7 in | High |
| Mar | 2.2 in | 7 days | 2.1 in | High |
| Apr | 1.1 in | 4 days | 3.2 in | Critical |
| 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 | 1.5 in | 5 days | 2.8 in | High |
| Dec | 2.7 in | 8 days | 1.6 in | High |
Annual total: 13.9 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.
Orange County Soil Profile
Soil Type
Loam
Soil pH
5.7-7.6
Drainage
Well Drained
Frost Risk Probability
Based on 24 years of NOAA weather station data from 2 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 2 | Dec 20 | 262 days |
| Cautious | Feb 28 | Dec 17 | 292 days |
| Average year | Feb 13 | Dec 11 | 301 days |
| Optimistic | Feb 2 | Nov 29 | 300 days |
| Aggressive (risky) | Jan 10 | Nov 15 | 309 days |
Not very — frost dates can vary by ±83 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 18.6 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Orange County has challenging growing conditions. Season extension and careful variety selection are essential.
Local Gardening Help in Orange 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 Orange County's climate and soil.
County Extension Office
Orange 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 Orange County
Finding local nurseries & garden centers in Orange County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Orange 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 Orange County CA" or "garden center Orange 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 Orange County CA" or check your extension office and local parks department. Facebook groups like "Orange 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
14.2 hours
Summer solstice daylight
Shortest Day
9.8 hours
Winter solstice daylight
Peak Sun Hours
12.8 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: Day-neutral onion varieties like Candy, Cabernet, and Sierra Blanca perform best in your day-length range.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 10 hr | 5.5 hr | Short day |
| February | 10.8 hr | 6.5 hr | Short day |
| March | 11.7 hr | 7.3 hr | Short day |
| April | 12.8 hr | 9.1 hr | Neutral |
| May | 13.7 hr | 11 hr | Neutral |
| June | 14.2 hr | 12.2 hr | Long day |
| July | 14 hr | 12.8 hr | Long day |
| August | 13.3 hr | 11.9 hr | Neutral |
| September | 12.2 hr | 10.2 hr | Neutral |
| October | 11.1 hr | 7.9 hr | Short day |
| November | 10.2 hr | 6.2 hr | Short day |
| December | 9.8 hr | 5.4 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 Mar through Dec.
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 | 56°F | 64°F | ♻️ Active | ~14 weeks |
| Feb | 58°F | 63°F | ♻️ Active | ~14 weeks |
| Mar | 64°F | 66°F | ♻️ Active | ~14 weeks |
| Apr | 71°F | 71°F | 🔥 Peak | ~8 weeks |
| May | 79°F | 76°F | 🔥 Peak | ~8 weeks |
| Jun | 87°F | 84°F | 🔥 Peak | ~8 weeks |
| Jul | 94°F | 90°F | 🔥 Peak | ~8 weeks |
| Aug | 94°F | 92°F | 🔥 Peak | ~8 weeks |
| Sep | 92°F | 89°F | 🔥 Peak | ~8 weeks |
| Oct | 84°F | 83°F | 🔥 Peak | ~8 weeks |
| Nov | 72°F | 76°F | 🔥 Peak | ~8 weeks |
| Dec | 63°F | 67°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 Orange 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 | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Whiteflies | High | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Spider mites | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Thrips | Moderate | Mar, Apr, May, Jun, Jul, Aug, Sep |
| Scale insects | Moderate | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Nematodes | Low | May, 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 Orange 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 | Feb 25 | Oct 2 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Feb 22 | Oct 16 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Feb 15 | Oct 2 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Jan 13 | Oct 9 | ✓ 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 5 | Nov 20 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (1 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Crimson clover | Oct 13 | Jan 30 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
Wind & Microclimate
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
3/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Moderate
Some terrain variation (470 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
6,927 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 13.9 inches of rain per year
- A 1,000 sq ft roof can collect roughly 6,927 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 Orange County
Soil Type
Loam
Soil pH 5.7–7.6 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 9.5/10
Very high drought stress. Irrigation is critical for garden success. Focus on water-efficient techniques and drought-adapted crops.
Season Tips
302-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 Orange County
106 vegetables that grow well in Zone 10a with planting dates for Orange County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Jan 16 | Feb 13 | Feb 20 | May 15 – Jun 19 | 80–100 |
| Amaranth | Jan 2 | Feb 13 | Feb 20 | May 22 – Jul 10 | 90–120 |
| Artichoke | — | — | Feb 27 | Jul 3 – Sep 11 | 120–180 |
| Arugula | Jan 16 | Jan 23 | Feb 13 | Mar 20 – May 22 | 30–50 |
| Asparagus | — | — | Feb 27 | — | 730–1095 |
| Beets | — | Jan 23 | — | Mar 20 – Apr 17 | 50–70 |
| Belgian Endive | Jan 16 | Jan 23 | Feb 13 | Jun 5 – Jul 31 | 110–150 |
| Bitter Melon | Jan 2 | Feb 13 | Feb 20 | Apr 24 – Jun 5 | 60–90 |
| Black Beans | — | Feb 20 | — | May 22 – Jul 10 | 90–120 |
| Bok Choy | Jan 16 | Jan 23 | Feb 13 | Mar 27 – May 1 | 40–60 |
| Broccoli | Jan 16 | Jan 23 | Feb 13 | Apr 17 – May 29 | 60–90 |
| Broccoli Rabe | Jan 16 | Jan 23 | Feb 13 | Mar 27 – May 1 | 40–60 |
| Brussels Sprouts | Jan 16 | Jan 23 | Feb 13 | May 15 – Jul 10 | 90–130 |
| Butternut Squash | Jan 16 | Feb 13 | Feb 20 | May 22 – Jun 26 | 85–110 |
| Cabbage | Jan 16 | Jan 23 | Feb 13 | Apr 17 – Jun 12 | 60–100 |
| Calabash | Jan 2 | Feb 13 | Feb 20 | May 15 – Jul 10 | 80–120 |
| Cardoon | — | — | Feb 27 | Jul 3 – Aug 14 | 120–150 |
| Carrots | — | Jan 23 | — | Mar 27 – May 1 | 60–80 |
| Cauliflower | Jan 16 | Jan 23 | Feb 13 | Apr 10 – Jun 12 | 55–100 |
| Celery | Jan 16 | Jan 23 | Feb 13 | May 8 – Jul 3 | 80–120 |
| Celtuce | Jan 16 | Jan 23 | Feb 13 | Apr 17 – May 29 | 60–90 |
| Chard | Jan 16 | Jan 23 | Feb 13 | Apr 10 – May 29 | 50–60 |
| Chayote | Jan 2 | Feb 13 | Feb 20 | Jun 26 – Sep 4 | 120–180 |
| Chickpeas | Jan 16 | Jan 23 | Feb 13 | May 8 – Jun 19 | 80–110 |
| Chicory | Jan 16 | Jan 23 | Feb 13 | Apr 17 – May 29 | 60–85 |
| Chinese Cabbage | Jan 16 | Jan 23 | Feb 13 | Apr 10 – May 8 | 50–70 |
| Christmas Lima Beans | Jan 2 | Feb 13 | Feb 20 | May 15 – Jun 19 | 80–100 |
| Collard Greens | Jan 16 | Jan 23 | Feb 13 | Apr 10 – Jun 12 | 55–75 |
| Corn | — | Feb 20 | — | Apr 24 – Jun 19 | 60–100 |
| Cowpeas | — | Feb 20 | — | Apr 24 – Jun 5 | 60–90 |
| Cress | Jan 16 | Jan 23 | Feb 13 | Feb 27 – Mar 20 | 14–21 |
| Crookneck Squash | Jan 16 | Feb 13 | Feb 20 | Apr 10 – May 8 | 45–60 |
| Cucumber | Jan 16 | Feb 13 | Feb 20 | Apr 17 – Jun 12 | 50–70 |
| Daikon | — | Jan 23 | — | Mar 20 – Apr 17 | 50–70 |
| Delicata Squash | Jan 16 | Feb 13 | Feb 20 | May 15 – Jun 19 | 80–100 |
| Edamame | — | Feb 20 | — | May 8 – Jun 19 | 75–100 |
| Eggplant | Jan 2 | Feb 13 | Feb 20 | May 1 – Jul 3 | 65–85 |
| Endive | Jan 16 | Jan 23 | Feb 13 | Apr 3 – May 8 | 45–65 |
| Escarole | Jan 16 | Jan 23 | Feb 13 | Apr 10 – May 8 | 50–70 |
| Fava Beans | Jan 16 | Jan 23 | Feb 13 | May 1 – Jun 12 | 75–100 |
| Fennel | Jan 2 | Feb 13 | Feb 20 | Apr 24 – Jun 5 | 60–90 |
| Ginger | Jan 2 | Feb 13 | Feb 20 | Oct 23 – Jan 1 | 240–300 |
| Green Beans | — | Feb 20 | — | Apr 17 – Jun 12 | 50–65 |
| Hot Peppers | Jan 2 | Feb 13 | Feb 20 | May 1 – Aug 7 | 70–120 |
| Hubbard Squash | Jan 16 | Feb 13 | Feb 20 | Jun 5 – Jul 10 | 100–120 |
| Jicama | Jan 2 | Feb 13 | Feb 20 | Jun 26 – Sep 4 | 120–180 |
| Kabocha | Jan 16 | Feb 13 | Feb 20 | May 22 – Jun 19 | 85–100 |
| Kai Lan | Jan 16 | Jan 23 | Feb 13 | Apr 3 – May 1 | 45–60 |
| Kale | Jan 16 | Jan 23 | Feb 13 | Apr 10 – Jun 5 | 50–70 |
| Kidney Beans | — | Feb 20 | — | May 22 – Jun 26 | 85–110 |
| Kohlrabi | Jan 16 | Jan 23 | Feb 13 | Apr 3 – May 8 | 45–65 |
| Komatsuna | Jan 16 | Jan 23 | Feb 13 | Mar 20 – Apr 24 | 35–50 |
| Leeks | Jan 16 | Jan 23 | Feb 13 | May 15 – Jul 31 | 90–150 |
| Lentils | Jan 16 | Jan 23 | Feb 13 | May 8 – Jun 19 | 80–110 |
| Lettuce | Jan 16 | Jan 23 | Feb 13 | Mar 20 – May 29 | 30–60 |
| Lima Beans | — | Feb 20 | — | Apr 24 – Jun 5 | 60–90 |
| Loofah | Jan 2 | Feb 13 | Feb 20 | Jun 5 – Aug 7 | 100–150 |
| Luffa | Jan 2 | Feb 13 | Feb 20 | May 22 – Aug 7 | 90–150 |
| Mache | Jan 16 | Jan 23 | Feb 13 | Mar 27 – May 1 | 40–60 |
| Malabar Spinach | Jan 2 | Feb 13 | Feb 20 | Apr 17 – May 15 | 55–70 |
| Melon | Jan 16 | Feb 13 | Feb 20 | May 1 – Jun 19 | 70–100 |
| Microgreens | Jan 16 | Jan 23 | Feb 13 | Feb 20 – Mar 20 | 7–21 |
| Mizuna | Jan 16 | Jan 23 | Feb 13 | Mar 20 – Apr 17 | 30–45 |
| Mustard Greens | Jan 16 | Jan 23 | Feb 13 | Mar 20 – May 22 | 30–50 |
| Napa Cabbage | Jan 16 | Jan 23 | Feb 13 | Apr 10 – May 15 | 55–75 |
| New Zealand Spinach | Jan 2 | Feb 13 | Feb 20 | Apr 17 – May 15 | 55–70 |
| Okra | Jan 2 | Feb 13 | Feb 20 | Apr 17 – Jun 12 | 50–65 |
| Onion | Jan 16 | Jan 23 | Feb 13 | May 15 – Jul 3 | 90–120 |
| Pac Choi | Jan 16 | Jan 23 | Feb 13 | Mar 27 – Apr 24 | 40–55 |
| Patty Pan Squash | Jan 16 | Feb 13 | Feb 20 | Apr 10 – May 8 | 45–60 |
| Peas | Jan 16 | Jan 23 | Feb 13 | Apr 10 – Jun 5 | 55–70 |
| Peppers | Jan 2 | Feb 13 | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Pole Beans | Jan 2 | Feb 13 | Feb 20 | Apr 17 – Jun 12 | 55–70 |
| Potatoes | Jan 2 | Feb 13 | Feb 20 | May 1 – Jul 10 | 70–120 |
| Pumpkin | Jan 16 | Feb 13 | Feb 20 | May 22 – Jul 10 | 85–120 |
| Purslane | Jan 16 | Jan 23 | Feb 13 | Mar 27 – May 1 | 40–60 |
| Radicchio | Jan 16 | Jan 23 | Feb 13 | Apr 17 – May 22 | 60–80 |
| Radish | — | Jan 23 | — | Feb 20 – Mar 13 | 22–35 |
| Romanesco | Jan 16 | Jan 23 | Feb 13 | May 1 – Jun 12 | 75–100 |
| Savoy Cabbage | Jan 16 | Jan 23 | Feb 13 | Apr 24 – Jun 19 | 70–110 |
| Scallions | Jan 16 | Jan 23 | Feb 13 | Apr 10 – May 8 | 50–70 |
| Scarlet Runner Beans | Jan 2 | Feb 13 | Feb 20 | Apr 24 – May 29 | 60–80 |
| Shallot | Jan 16 | Jan 23 | Feb 13 | May 15 – Jul 3 | 90–120 |
| Shiso | Jan 2 | Feb 20 | Feb 20 | Apr 17 – Jun 12 | 50–70 |
| Snap Peas | Jan 2 | Feb 13 | Feb 20 | Apr 17 – Jun 12 | 55–70 |
| Snow Peas | Jan 16 | Jan 23 | Feb 13 | Apr 10 – Jun 5 | 50–65 |
| Soybeans | — | Feb 20 | — | May 15 – Jul 10 | 80–120 |
| Spaghetti Squash | Jan 16 | Feb 13 | Feb 20 | May 22 – Jun 19 | 85–100 |
| Spinach | Jan 16 | Jan 23 | Feb 13 | Mar 20 – May 22 | 35–50 |
| Squash (Summer) | Jan 16 | Feb 13 | Feb 20 | Apr 10 – Jun 12 | 45–65 |
| Squash (Winter) | Jan 16 | Feb 13 | Feb 20 | May 15 – Jul 10 | 80–120 |
| Sunflower | Jan 2 | Feb 13 | Feb 20 | May 1 – Jun 19 | 70–100 |
| Sweet Corn | — | Feb 20 | — | Apr 24 – Jun 5 | 60–90 |
| Sweet Potatoes | Jan 2 | Feb 13 | Feb 20 | May 22 – Jul 10 | 90–120 |
| Tatsoi | Jan 16 | Jan 23 | Feb 13 | Mar 20 – Apr 24 | 35–50 |
| Tomatillo | Jan 2 | Feb 13 | Feb 20 | Apr 24 – Jul 3 | 60–85 |
| Tomatoes | Jan 2 | Feb 13 | Feb 20 | Apr 24 – Jul 3 | 60–85 |
| Turmeric | Jan 2 | Feb 13 | Feb 20 | Oct 23 – Jan 1 | 240–300 |
| Turnip | — | Jan 23 | — | Mar 6 – Apr 10 | 40–60 |
| Watercress | Jan 16 | Jan 23 | Feb 13 | Mar 27 – May 1 | 40–60 |
| Watermelon | Jan 16 | Feb 13 | Feb 20 | May 1 – Jun 19 | 70–100 |
| Wax Beans | — | Feb 20 | — | Apr 17 – Jun 12 | 50–65 |
| Winter Melon | Jan 2 | Feb 13 | Feb 20 | May 22 – Jul 10 | 90–120 |
| Yam | Jan 2 | Feb 13 | Feb 20 | Aug 21 – Feb 5 | 180–330 |
| Yard Long Beans | Jan 2 | Feb 13 | Feb 20 | Apr 17 – May 29 | 55–80 |
| Zucchini | Jan 16 | Feb 13 | Feb 20 | Apr 10 – Jun 5 | 45–60 |
🍓 Fruits to Grow in Orange County
16 fruits that grow well in Zone 10a with planting dates for Orange County.
Show all 16 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Feb 27 | May 29 – Sep 11 | 90–180 |
| Blackberries | — | — | Feb 27 | — | 365–730 |
| Boysenberries | — | — | Feb 27 | — | 365–730 |
| Cantaloupe | — | — | Feb 27 | May 8 – Jun 12 | 70–90 |
| Che Fruit | — | — | Feb 27 | — | 1095–1825 |
| Dragon Fruit | — | — | Feb 27 | — | 365–730 |
| Figs | — | — | Feb 27 | — | 730–1825 |
| Goji Berries | — | — | Feb 27 | — | 730–1095 |
| Grapes | — | — | Feb 27 | — | 730–1095 |
| Ground Cherry | — | — | Feb 27 | May 8 – Jul 3 | 65–80 |
| Guava | — | — | Feb 27 | — | 365–730 |
| Honeydew | — | — | Feb 27 | May 22 – Jul 3 | 80–110 |
| Loquat | — | — | Feb 27 | — | 730–1825 |
| Passion Fruit | — | — | Feb 27 | — | 365–545 |
| Pomegranate | — | — | Feb 27 | — | 730–1095 |
| Strawberries | — | — | Feb 27 | May 29 – Feb 26 | 90–365 |
🌿 Herbs to Grow in Orange County
23 herbs that grow well in Zone 10a with planting dates for Orange County.
Show all 23 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Anise | Jan 16 | Jan 23 | Feb 6 | May 8 – Jul 24 | 90–120 |
| Basil | Jan 2 | Feb 20 | Feb 20 | Apr 17 – Jun 19 | 50–75 |
| Borage | Jan 16 | Jan 23 | Feb 6 | Apr 3 – May 22 | 50–60 |
| Chervil | Jan 16 | Jan 23 | Feb 6 | Mar 20 – May 22 | 40–60 |
| Chives | — | — | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Cilantro | Jan 16 | Jan 23 | Feb 6 | Mar 20 – May 22 | 40–60 |
| Cumin | Jan 16 | Jan 23 | Feb 6 | May 22 – Jul 24 | 100–120 |
| Dill | Jan 16 | Jan 23 | Feb 6 | Mar 20 – May 22 | 40–60 |
| Epazote | Jan 2 | Feb 20 | Feb 20 | Apr 10 – Jun 5 | 45–60 |
| Fennel (herb) | Jan 16 | Jan 23 | Feb 6 | Apr 10 – Jun 19 | 60–90 |
| Garlic Chives | — | — | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Horehound | — | — | Feb 20 | May 8 – Jul 3 | 75–90 |
| Lemon Verbena | Jan 2 | Feb 20 | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Lemongrass | Jan 2 | Feb 20 | Feb 20 | May 8 – Aug 7 | 75–120 |
| Marjoram | — | — | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Mint | — | — | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Oregano | — | — | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Parsley | Jan 16 | Jan 23 | Feb 6 | Apr 10 – Jun 12 | 60–80 |
| Rosemary | — | — | Feb 20 | May 15 – Oct 2 | 80–180 |
| Sage | — | — | Feb 20 | May 8 – Jul 3 | 75–90 |
| Savory | — | — | Feb 20 | Apr 17 – Jun 12 | 50–70 |
| Stevia | Jan 2 | Feb 20 | Feb 20 | Apr 24 – Jul 3 | 60–90 |
| Thai Basil | Jan 2 | Feb 20 | Feb 20 | Apr 17 – Jun 19 | 50–75 |
Monthly Planting Guide for Orange County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Orange County.
Frequently Asked Questions
What planting zone is Orange County, CA?
Orange County is in USDA Hardiness Zone 10a. 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 Orange County, CA?
Based on 24 years of NOAA weather station data, the median last spring frost in Orange County falls around February 13. In 8 out of 10 years, last frost lands between January 10 and April 2 — a 83-day window of variability. Use April 2 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Orange County, CA?
The median first fall frost in Orange County arrives around December 11. In cold years it can arrive as early as November 15; in mild years as late as December 20. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Orange County?
Orange County has a frost-free growing season of approximately 302 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 18.61 days per decade.
What is the soil like in Orange County for gardening?
Orange County has predominantly Loam soil with a pH range of 5.7–7.6 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Orange County?
Orange County has commercial agriculture that includes Lettuce, Strawberries, Broccoli. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Orange County a good location for home gardening?
Orange County scores 38/100 (Challenging) 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 Orange County gardeners in Zone 10a organize planting dates, track what's growing, and never miss a planting window.
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