Germination
7–10 days
Usually sprouts well in warm, evenly moist mix.
Harvest
30–40 days
Harvest baby leaves first, then cut again later.
Temp
55–75°F (13–24°C)
Cool to mild conditions are ideal.
Light
Bright light, 6–8 hrs/day
Good light helps leaves stay compact and strong.
Quick Start (30 seconds)
Keep it simple: steady moisture, bright light, and the right sowing depth.
Prep
Fill pots or trays with evenly moistened, loose seed-starting mix.
Sow
Sow seeds about 2× their thickness; shallow sowing works best.
Water
Keep the mix evenly moist throughout—damp, not dripping or soggy.
Light
Give 6–8 hours of bright light from sun or grow lights.
Thin
Thin seedlings early and keep the strongest after sprouting.
Tip: Warmth, bright light, and evenly moist seed-starting mix help most varieties sprout in about 7–10 days.
Common Mistakes
Keep the mix evenly moist throughout during germination.
Move closer to a bright window or add a grow light.
Thin seedlings early so roots and leaves can develop.
Ready to grow the full kit?
Shop the full 6-Pack for Leaf Lettuce, Arugula, Kale, Basil, Mint, and Chives.
Heirloom · open-pollinated · batch-tested for germination
Frequently Asked Questions
Yes. Kale is sturdy, forgiving, and easy to harvest more than once.
In warm conditions, kale often begins sprouting in about 7–10 days.
Yes. Bright light and steady moisture usually work well.
Start with baby leaves, then continue harvesting as plants regrow.
Most often the cause is low light, crowding, or dry mix below the surface.