What to Plant in December
Seattle, WA · Zone 8b
Last frost: Mar 8
Frost-free days: 257
Winter gardening continues — harvest cool-season greens and root vegetables. Plan next year's layout and order seeds early for the best selection.
December at a Glance
Indoor
Transplant
Direct Sow
1
5
10
15
20
25
Chives
Mint
Parsley
Brussels Sprouts
Celery
Leek
Onion
Spinach
Strawberry
Start Indoors 9
Start these seeds indoors under grow lights or on a sunny windowsill.
Plant now
Chives
Jan 1 – Dec 31
9 per sq ft
60–90 days
Mint
Jan 1 – Dec 31
4 per sq ft
60–90 days
Strawberry
Jan 1 – Dec 31
4 per sq ft
60–90 days
Brussels Sprouts
Oct 24 – Dec 31
1 per sq ft
80–110 days
Spinach
Nov 16 – Dec 31
9 per sq ft
35–50 days
Onion
Nov 24 – Dec 31
9 per sq ft
100–120 days
Leek
Dec 1–31
4 per sq ft
90–150 days
Parsley
Dec 9–31
4 per sq ft
70–90 days
Later this month
Celery
Dec 24–31
4 per sq ft
80–120 days
Transplant 4
Move these seedlings from indoors to your garden beds.
Plant now
Chives
Jan 1 – Dec 31
9 per sq ft
60–90 days
Mint
Jan 1 – Dec 31
4 per sq ft
60–90 days
Strawberry
Jan 1 – Dec 31
4 per sq ft
60–90 days
Later this month
Spinach
Dec 17–31
9 per sq ft
35–50 days
December Gardening Tips
- Start Spinach, Strawberry, Celery indoors now to give them a head start before transplanting outside.
- Spinach, Strawberry, Chives can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
- Get a soil test now — results come back fast in the off-season and you can amend before spring.
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