Planting guide · zone 6a
When to plant cabbage in zone 6a
In zone 6a, the average last spring frost is Apr 28 and the first fall frost is Oct 15. Here is cabbage's whole year, counted from those dates.
Mar 3Start seeds indoorsSpring
Apr 7Transplant into the gardenSpring
Jul 2Start seeds indoorsFall
Jul 30Transplant into the gardenFall
J
F
M
A
M
J
J
A
S
O
N
D
Soil & site
A heavy feeder — generous compost, steady moisture. Erratic watering after heads form makes them split.
Seedling care
Plant starts deep like broccoli. Closer spacing gives smaller, denser heads — 12 in is fine for fresh eating.
Growing notes
The most cold-tolerant of the big brassicas; mature heads shrug off the low 20s.
Harvest
Squeeze — a ready head is hard as a ball. Cut and leave the outer leaves; small secondary heads often follow.
Same crop, other zones
Cabbage in zone 5a →Cabbage in zone 5b →Cabbage in zone 6b →Cabbage in zone 7a →