How long is the growing season in Zone 10a?

Zone 10a has an average growing season of 337 frost-free days.

Zone 10a Planting Schedule

Q: What are the frost dates for Zone 10a?

In Zone 10a, the average last spring frost is Jan 16th and the average first fall frost is Dec 19th.

Q: When is the best time to start seeds indoors in Zone 10a?

In Zone 10a, start seeds indoors 6–8 weeks before your average last spring frost (around Jan 16th). The exact timing varies by crop — check the planting schedule above for crop-specific indoor seed start dates.

Last spring frost: Jan 16th

First fall frost: Dec 19th

Growing season: 337 days

All Zones Zone 10a Save Garden

Action Plan: October in Zone 10a

Expert Note

In October, keep soil evenly moist but avoid waterlogging; aim for consistent germination as nights cool. Watch for slugs and aphids on tender starts, and use row cover if temperatures swing. Prepare beds with compost and ensure good drainage.

Seed & Soil

Transplant or direct sow German Extra Hardy now for cool-season growth. Start Green Sleeves and Kojak indoors so they’re ready to move out as conditions stabilize, giving you an early jump on fall harvests.

Planting Schedule

Add crops from the list below to build your planting schedule.

Crop	Indoor Start	Transplant / Sow	Harvest Window
Abe Lincoln	Continuous Production
Ace	Continuous Production
Ace 55	Continuous Production
Ace Of Spades	Continuous Production
Adagio	—	Oct 1st	Nov 10th – Feb 28th
Adelaide	—	Oct 1st	Dec 10th – Feb 28th
Adirondack Blue	Continuous Production
Adirondack Red	Continuous Production
Afina	—	Oct 1st	Nov 30th – Feb 28th
African Basil	—	Oct 1st	Nov 30th – Feb 28th
African Blue	—	Oct 1st	Dec 10th – Feb 28th
African Blue Basil	—	Oct 1st	Dec 5th – Feb 28th
African Kettle	Continuous Production
African Marigold	—	Oct 1st	Nov 30th – Feb 28th
African Sunset	Continuous Production
Agora	—	Oct 1st	Nov 25th – Feb 28th
Ailsa Craig	—	Oct 1st	Jan 4th – Feb 28th
Aji Amarillo	Continuous Production
Aji Cacho De Cabra	Continuous Production
Aji Charapita	Continuous Production
Aji Cito	Continuous Production
Aji Cristal	Continuous Production
Aji Dulce	Continuous Production
Aji Dulce #1	Continuous Production
Aji Dulce #2	Continuous Production
Aji Dulce Amarillo	Continuous Production
Aji Fantasy	Continuous Production
Aji Golden	Continuous Production
Aji Habanero	Continuous Production
Aji Lemon Drop	Continuous Production

Frequently Asked Questions

What are the frost dates for Zone Zone 10a?

In Zone Zone 10a, the average last spring frost is Jan 16th and the average first fall frost is Dec 19th.

When is the best time to start seeds indoors in Zone Zone 10a?

The best time to start most seeds indoors is 6 to 8 weeks before your last spring frost date of Jan 16th.

How long is the growing season in Zone Zone 10a?

Zone Zone 10a has a growing season of approximately 337 days.