Planting guide · zone 9a
When to plant kale in zone 9a
In zone 9a, the average last spring frost is Feb 28 and the first fall frost is Dec 1. Here is kale's whole year, counted from those dates.
Dec 20, 2025Start seeds indoorsSpring
Jan 24Transplant into the gardenSpring
Aug 28Start seeds indoorsFall
Sep 25Transplant into the gardenFall
J
F
M
A
M
J
J
A
S
O
N
D
Soil & site
Rich soil with plenty of nitrogen — compost generously at planting. pH 6.0–7.0.
Seedling care
Ready to transplant at 4–6 weeks with 4 true leaves. Harden off over 5–7 days, and bury the stem to the first leaves.
Growing notes
The workhorse green. Watch for cabbage worms early; row cover at transplant stops the moths entirely.
Harvest
Pick lower leaves and let the crown keep producing. Flavor sweetens dramatically after hard frost.