How to Start Kale Seeds
Hardy superfood that gets sweeter after frost - perfect for beginner gardeners!
Frost Makes Kale Sweeter!
Kale is incredibly frost-hardy (down to 20°F!) and actually improves after cold exposure. Fall-planted kale that experiences frost converts starches to sugars, resulting in noticeably sweeter leaves.
Step-by-Step Guide
Prepare Containers
Fill cells or small pots with moistened seed starting mix. Kale grows large, so 2" deep cells work well for starting.
Plant Seeds
Plant 2-3 seeds per cell, 1/4 to 1/2 inch deep. Cover lightly with soil and water gently. Seeds don't need light to germinate.
Keep Moist & Moderate
Kale germinates in cool to moderate temps (60-75°F). Keep soil moist but not waterlogged. Expect sprouts in 5-10 days.
Provide Strong Light
Once sprouted, provide 12-16 hours of light daily. Strong light prevents leggy seedlings and builds sturdy plants.
Thin Seedlings
When seedlings have 2 true leaves, thin to one plant per cell. Snip extras at soil level - baby kale is delicious in salads!
Harden Off & Transplant
Harden off seedlings for 1 week before transplanting. Kale is tough and can go outside 3-4 weeks before last frost!
Popular Kale Varieties
Lacinato (Dinosaur) Kale
Dark blue-green, bumpy leaves. Tender texture, great raw or cooked. Very cold-hardy.
Curly Kale
Classic ruffled leaves, blue-green. Most common variety. Great for chips and smoothies.
Red Russian Kale
Purple stems, flat frilly leaves. Very tender when young. Beautiful and delicious.
Dwarf Blue Curled
Compact plants perfect for containers. Tightly curled blue-green leaves.
Frequently Asked Questions
When should I start kale seeds indoors?
Start kale 4-6 weeks before your last frost date for spring planting, or 6-8 weeks before first fall frost for a fall crop. Kale actually tastes sweeter after frost!
How long does kale take to germinate?
Kale seeds germinate in 5-10 days at 60-75°F. They can sprout in soil as cool as 40°F, making kale one of the earliest crops you can start.
Does kale tolerate frost?
Yes! Kale is one of the hardiest vegetables. It tolerates temps down to 20°F and actually becomes sweeter after frost converts starches to sugars. It's a great fall/winter crop.
Can I grow kale in containers?
Absolutely! Kale thrives in containers. Use at least a 5-gallon pot per plant, ensure good drainage, and harvest outer leaves regularly for continuous production.