Planting guide · zone 9a
When to plant rutabaga in zone 9a
In zone 9a, the average last spring frost is Feb 28 and the first fall frost is Dec 1. Here is rutabaga's whole year, counted from those dates.
Aug 28Direct sowFall
J
F
M
A
M
J
J
A
S
O
N
D
Soil & site
Firm, fertile soil, pH 6.0–6.8. A boron-deficient bed causes brown heart — a dusting of borax per label rates prevents it.
Seedling care
Thin to 6–8 in once seedlings have true leaves; rutabagas need real elbow room to bulb.
Growing notes
The longest-season root in the fall garden — get it in on time. Steady water prevents woody roots.
Harvest
Best after a few frosts, around 3–5 in. Stores for months in a cool cellar or fridge.