What to Plant in December
USDA Zone 7a
Last frost: Mar 15 – Apr 1
Frost-free days: 190–220
The garden rests under snow or mulch. This is planning season — review what worked, order seeds, and sketch out next year's bed layouts.
December at a Glance
Indoor
Transplant
Direct Sow
1
5
10
15
20
25
Onions (seed)
Start Indoors 1
Start these seeds indoors under grow lights or on a sunny windowsill.
Onions (seed)
Dec 15 – Jan 1
9 per sq ft
100–120 days
December Gardening Tips
- Start Onions (seed) indoors now to give them a head start before transplanting outside.
- Get a soil test now — results come back fast in the off-season and you can amend before spring.
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