When to Plant Squash (Winter) in Orange County, CA
Winter squash includes butternut, acorn, delicata, and hubbard varieties grown to full maturity with hard rinds for storage. They develop sweet, dense flesh.
Orange County, California 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 301 days.
At an elevation of 405 feet, Orange County receives approximately 13.8 inches of rainfall annually with predominantly loam soil. Summer highs average 88°F, providing good warmth for Squash (Winter) during the growing season. With low rainfall, drip irrigation is essential for growing Squash (Winter) successfully. Mulch heavily to conserve soil moisture.
Orange County Soil Profile
Soil Type
Loam
Soil pH
5.7-7.6
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Squash (Winter) Planting Timeline — Orange County, CA
Squash (Winter) Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 16 | Jan 16 – Jan 30 |
| Transplant Outdoors | February 20 | Feb 20 – Mar 6 |
| Direct Sow | February 13 | Feb 13 – Mar 6 |
| Harvest | May 15 | May 15 – Jul 10 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
80–120 days
Soil pH
6 – 7
USDA Zone
Zone 10a
Growing Season
301 days
Growing Tips for Orange County
Direct sow after last frost on rich mounds. Allow ample space for sprawling vines. Cure harvested fruits in the sun for 10 days before storing in a cool, dry place.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Squash (Winter) in Other Locations
Frequently Asked Questions
When should I plant Squash (Winter) in Orange County, CA?
Orange County is in Zone 10a with an average last frost of February 13. Plan your Squash (Winter) planting based on this frost date — see the calendar above for exact timing.
What planting zone is Orange County, CA?
Orange County, California is in USDA Hardiness Zone 10a. The average last spring frost is February 13 and first fall frost is December 11.
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.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.