How long is the growing season in Zone 12a?

Zone 12a has an average growing season of 365 frost-free days.

Zone 12a Planting Schedule

Q: What are the frost dates for Zone 12a?

In Zone 12a, the average last spring frost is Jan 1st and the average first fall frost is Dec 31st.

Q: When is the best time to start seeds indoors in Zone 12a?

In Zone 12a, start seeds indoors 6–8 weeks before your average last spring frost (around Jan 1st). The exact timing varies by crop — check the planting schedule above for crop-specific indoor seed start dates.

Last spring frost: Jan 1st

First fall frost: Dec 31st

Growing season: 365 days

All Zones Zone 12a Save Garden

Action Plan: October in Zone 12a

Expert Note

In Zone 12a during October, keep soil evenly moist but well-drained and avoid waterlogged beds. Watch for onion thrips and fungal leaf spots; space plants for airflow and remove any yellowing leaves. Plant at the right depth and firm the soil to reduce heaving.

Seed & Soil

Focus on planting Chesnok Red now while temperatures are still favorable for root establishment. If you’re starting onions indoors, begin transplants from your selected varieties soon so they’re ready to go into the garden with strong, sturdy growth.

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 12a?

In Zone Zone 12a, the average last spring frost is Jan 1st and the average first fall frost is Dec 31st.

When is the best time to start seeds indoors in Zone Zone 12a?

The best time to start most seeds indoors is 6 to 8 weeks before your last spring frost date of Jan 1st.

How long is the growing season in Zone Zone 12a?

Zone Zone 12a has a growing season of approximately 365 days.