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🥦 Growing Cauliflower in Zone 1a

Zone 1a has harsh winters and a short growing season. Start Cauliflower early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 13Aug 28

Season: May 25 – Aug 28 (95 days)

Zone1a

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest75

SunFull Sun

Frost ToleranceModerate

Spacing1/sqft (12" apart)

When to Plant Cauliflower in Zone 1a

Start Seeds Indoors: Apr 13

Start Cauliflower seeds indoors around Apr 13 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.

Transplant Outdoors: May 11

Transplant Cauliflower seedlings outdoors after May 11. Wait until soil temperature reaches 50°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Jul 10

First harvest approximately Jul 10 (~60 days from transplant). Continue harvesting until first frost (Aug 28).

Fall Planting: Jun 5

For a fall harvest, plant Cauliflower around Jun 5 (12 weeks before first frost).

Companion Planting

✅ Spinach ✅ Celery ✅ Thyme✅ Beans

❌ Tomatoes❌ Strawberries❌ Peas

Cauliflower in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Cauliflower in Zone 1a?

Start Cauliflower seeds indoors around Apr 13. Transplant outdoors after May 11. Expect first harvest around Jul 10.

What is the last frost date for Zone 1a?

The average last spring frost date for Zone 1a is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Cauliflower in Zone 1a?

Yes. Cauliflower needs 75 days to harvest. Zone 1a has a 95-day growing season, which is sufficient.

What is the best month to plant Cauliflower in Zone 1a?

The best time to start Cauliflower in Zone 1a is Apr. Begin seeds indoors around Apr 13, then transplant outdoors after the last frost date of May 25.

What companion plants grow well with Cauliflower?

Good companion plants for Cauliflower include Spinach, Celery, Thyme, Beans. Avoid planting Cauliflower near Tomatoes, Strawberries, Peas.

How long does Cauliflower take to harvest?

Cauliflower takes approximately 75 days from planting to harvest. In Zone 1a, expect your first harvest around Jul 10.

Plan Your Cauliflower Garden

Track Cauliflower from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Cauliflower Growing Guide