When to Plant Cauliflower in Caldwell, Idaho (83607)

Location

Caldwell, Idaho

ZIP Code

83607

USDA Zone

Last Frost

Friday, April 10, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, February 27, 2026

Transplant Outdoors Friday, April 10, 2026

Pro Tip: Start Cauliflower seeds indoors 6 weeks before your last frost date, then transplant outdoors around Friday, April 10, 2026.

🌿 Plant Details

Scientific Name Brassica oleracea var. botrytis

Days to Maturity 75 days

Mature Height 18-24"

Spread 24"

Type Head

Fruit Size Medium (6-8 inch head)

☀️ Growing Requirements

☀️

Sun

Full Sun (6 hours)

💧

Water

Regular (1-1.5 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-10 days

Ready to Plant Cauliflower in Caldwell?

Get your seeds now so they're ready by Friday, February 27, 2026.

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🤝 Good Companions

BeetCeleryBeanOnion

⚠️ Avoid Planting Near

StrawberryTomato

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Growing Cauliflower in Zone 7a

Cauliflower (Brassica oleracea var. botrytis) is a popular garden vegetable. In Caldwell, Idaho, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 27, 2026.

Your average last frost date is Friday, April 10, 2026. Plan to transplant your Cauliflower seedlings outdoors around Friday, April 10, 2026, about 0 weeks after your last frost date.