When to Plant Kohlrabi in Austin, Texas (78708)

Location

Austin, Texas

ZIP Code

78708

USDA Zone

Last Frost

Friday, February 20, 2026

📅 Planting Calendar

Start Seeds Indoors Friday, January 23, 2026

Transplant Outdoors Friday, February 6, 2026

Pro Tip: Start Kohlrabi seeds indoors 4 weeks before your last frost date, then transplant outdoors around Friday, February 6, 2026.

🌿 Plant Details

Scientific Name Brassica oleracea var. gongylodes

Days to Maturity 55 days

Mature Height 12-18"

Spread 8"

Type Bulb

Fruit Size Small-Medium (2-3 inch bulb)

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (consistent moisture prevents cracking)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Kohlrabi in Austin?

Get your seeds now so they're ready by Friday, January 23, 2026.

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🤝 Good Companions

BeetOnionCucumberHerb

⚠️ Avoid Planting Near

TomatoPepperStrawberry

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Growing Kohlrabi in Zone 9a

Kohlrabi (Brassica oleracea var. gongylodes) is a popular garden vegetable. In Austin, Texas, which is in USDA Hardiness Zone 9a, you should start seeds indoors around Friday, January 23, 2026.

Your average last frost date is Friday, February 20, 2026. Plan to transplant your Kohlrabi seedlings outdoors around Friday, February 6, 2026, about -2 weeks after your last frost date.