When to Plant Broccoli Raab in Topeka, Kansas (66621)

Location

Topeka, Kansas

ZIP Code

66621

USDA Zone

Last Frost

Wednesday, April 15, 2026

📅 Planting Calendar

Direct Sow Outdoors Wednesday, March 4, 2026

Pro Tip: Sow Broccoli Raab directly outdoors 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica rapa subsp. rapa

Days to Maturity 60 days

Mature Height 12-24"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Broccoli Raab in Topeka?

Get your seeds now so they're ready by Wednesday, March 4, 2026.

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🤝 Good Companions

OnionBeetCelery

⚠️ Avoid Planting Near

TomatoPepperStrawberry

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Growing Broccoli Raab in Zone 6b

Broccoli Raab (Brassica rapa subsp. rapa) is a popular garden vegetable. In Topeka, Kansas, which is in USDA Hardiness Zone 6b, you should direct sow seeds around Wednesday, March 4, 2026.

Your average last frost date is Wednesday, April 15, 2026. Broccoli Raab grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.