When should I plant Cauliflower in Zone 6b?

Start Cauliflower seeds indoors around Mar 4. Transplant outdoors after Apr 1. Expect first harvest around May 31.

What is the last frost date for Zone 6b?

The average last spring frost date for Zone 6b is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.

Can I grow Cauliflower in Zone 6b?

Yes. Cauliflower needs 75 days to harvest. Zone 6b has a 190-day growing season, which is sufficient.

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🥦 Growing Cauliflower in Zone 6b

Zone 6b has mild winters and a long growing season — good conditions for Cauliflower. Last frost: Apr 15. First frost: Oct 22.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 4Oct 22

Season: Apr 15 – Oct 22 (190 days)

Zone6b

Last FrostApr 15

First FrostOct 22

Season Length190 days

Days to Harvest75

SunFull Sun

Frost ToleranceModerate

Spacing1/sqft (12" apart)

When to Plant Cauliflower in Zone 6b

Start Seeds Indoors: Mar 4

Start Cauliflower seeds indoors around Mar 4 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.

Transplant Outdoors: Apr 1

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

Harvest: May 31

First harvest approximately May 31 (~60 days from transplant). Continue harvesting until first frost (Oct 22).

Fall Planting: Jul 30

For a fall harvest, plant Cauliflower around Jul 30 (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

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