How long is the growing season in Zone 1a?

Zone 1a has an average growing season of 30 frost-free days.

Zone 1a Planting Schedule

Q: What are the frost dates for Zone 1a?

In Zone 1a, the average last spring frost is Jun 15th and the average first fall frost is Jul 15th.

Q: When is the best time to start seeds indoors in Zone 1a?

In Zone 1a, start seeds indoors 6–8 weeks before your average last spring frost (around Jun 15th). The exact timing varies by crop — check the planting schedule above for crop-specific indoor seed start dates.

Last spring frost: Jun 15th

First fall frost: Jul 15th

Growing season: 30 days

All Zones Zone 1a Save Garden

Action Plan: October in Zone 1a

Expert Note

In October, keep soil evenly moist but avoid waterlogging. Watch for late-season aphids and fungal leaf spots; improve airflow and remove any diseased leaves. Harvest in the morning and cool produce quickly to reduce spoilage.

Seed & Soil

With only a short frost-free window, focus on quick, cold-tolerant starts like Spinach, Lettuce, and Arugula. If you have space, direct-sow Carrot and Radish while soil is still workable for faster germination.

The Harvest

Keep harvesting peppers and eggplants as they ripen, especially Jalapeño, Poblano, and Shishito. Also pull tender greens and herbs like Lettuce and Spinach before cold nights slow growth and quality declines.

Planting Schedule

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

Crop	Indoor Start	Transplant / Sow	Harvest Window
Artichoke	Mar 23rd	Jun 1st	Oct 29th – Jul 15th
Gros Vert de Laon	Mar 23rd	Jun 8th	Sep 6th – Jul 15th
Artichaut de Nice	Apr 6th	Jun 8th	Oct 6th – Jul 15th
Artichoke de Marseille	Apr 6th	Jul 27th	Oct 25th – Jul 15th
Baby Artichoke	Apr 6th	Jun 8th	Sep 1st – Jul 15th
Catanese	Apr 6th	Aug 10th	Dec 8th – Jul 15th
Cheyenne Spirit	Apr 6th	Jun 8th	Sep 6th – Jul 15th
Colossus	Apr 6th	Jun 15th	Aug 24th – Jul 15th
Cynara scolymus 'Green Globe'	Apr 6th	Jun 8th	Jun 7th – Jul 15th
Darklet	Apr 6th	Jun 8th	Oct 6th – Jul 15th
Fiery Meadow Mama	Apr 6th	Jun 15th	Sep 13th – Jul 15th
Giant Chabaud Enfant De Nice	Apr 6th	Jun 8th	Oct 6th – Jul 15th
Gorizia	Apr 6th	Jun 1st	Aug 30th – Jul 15th
Jersey Giant	Apr 6th	Jun 1st	May 31st – Jul 15th
Marmalade	Apr 6th	Jun 15th	Sep 13th – Jul 15th
Moreno	Apr 6th	Jun 8th	Sep 6th – Jul 15th
Munstead	Apr 6th	Jun 15th	Jun 15th – Jul 15th
Peppermint Stick	Apr 6th	Jun 1st	Aug 25th – Jul 15th
PowWow White	Apr 6th	Jun 1st	Aug 10th – Jul 15th
Provence	Apr 6th	Jun 8th	Jun 8th – Jul 15th
Purple Italian Globe	Apr 6th	Jun 8th	Nov 5th – Jul 15th
Surfinia Hot Pink	Apr 6th	Aug 10th	Oct 19th – Jul 15th
Tuscany Spineless	Apr 6th	Jun 8th	Sep 6th – Jul 15th
Alyssum	Apr 20th	Jun 15th	Sep 13th – Jul 15th
Aureum	Apr 20th	Jun 15th	Sep 3rd – Jul 15th
Aureus	Apr 20th	Aug 3rd	Oct 2nd – Jul 15th
Barbeque	Apr 20th	Aug 3rd	Nov 1st – Jul 15th
Beefmaster	Apr 20th	Aug 10th	Nov 8th – Jul 15th
Black Adder	Apr 20th	Jun 15th	Aug 24th – Jul 15th
Common Thyme	Apr 20th	Jun 15th	Aug 14th – Jul 15th

Frequently Asked Questions

What are the frost dates for Zone Zone 1a?

In Zone Zone 1a, the average last spring frost is Jun 15th and the average first fall frost is Jul 15th.

When is the best time to start seeds indoors in Zone Zone 1a?

The best time to start most seeds indoors is 6 to 8 weeks before your last spring frost date of Jun 15th.

How long is the growing season in Zone Zone 1a?

Zone Zone 1a has a growing season of approximately 30 days.