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When to Plant Kale in Knoxville, Tennessee (37921)

Location

Knoxville, Tennessee

ZIP Code

37921

USDA Zone

7b

Last Frost

Sunday, April 5, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, February 22, 2026

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

🌿 Plant Details

Scientific Name Brassica oleracea
Days to Maturity 55 days
Mature Height 18-24"
Spread 18"
Type Leaf
Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (1-1.5 inches/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 5-10 days

Ready to Plant Kale in Knoxville?

Get your seeds now so they're ready by Sunday, February 22, 2026.

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🤝 Good Companions

BeetCeleryCucumberDillOnion

⚠️ Avoid Planting Near

StrawberryTomato

Other Plants for Knoxville

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Growing Kale in Zone 7b

Kale (Brassica oleracea) is a popular garden vegetable. In Knoxville, Tennessee, which is in USDA Hardiness Zone 7b, you should direct sow seeds around Sunday, February 22, 2026.

Your average last frost date is Sunday, April 5, 2026. Kale grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.