What to Plant in September
Seattle, WA · Zone 8b
Last frost: Mar 8
Frost-free days: 257
The fall growing season is in full swing. Transplant brassicas and direct sow greens, root vegetables, and herbs that thrive in cooler temperatures.
September at a Glance
Indoor
Transplant
Direct Sow
1
5
10
15
20
25
Chives
Cilantro
Mint
Parsley
Beet
Garlic
Lettuce
Peas
Radish
Spinach
Strawberry
Swiss Chard
Turnip
Start Indoors 4
Start these seeds indoors under grow lights or on a sunny windowsill.
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
Spinach
Aug 1 – Sep 30
9 per sq ft
35–50 days
Transplant 7
Move these seedlings from indoors to your garden beds.
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
Parsley
Feb 15 – Sep 8
4 per sq ft
70–90 days
Lettuce
Feb 15 – Sep 23
4 per sq ft
45–60 days
Swiss Chard
Feb 15 – Sep 8
4 per sq ft
50–60 days
Spinach
Sep 1 – Oct 31
9 per sq ft
35–50 days
Direct Sow 6
Plant these seeds directly into the soil outdoors.
Garlic
Jan 1 – Sep 8
9 per sq ft
180–240 days
Cilantro
Feb 15 – Sep 30
9 per sq ft
30–45 days
Beet
Feb 15 – Sep 15
9 per sq ft
50–70 days
Peas
Feb 15 – Sep 8
8 per sq ft
55–70 days
Turnip
Feb 15 – Oct 16
9 per sq ft
30–60 days
Radish
Mar 9 – Oct 8
16 per sq ft
22–30 days
September Gardening Tips
- Start Spinach, Strawberry, Chives indoors now to give them a head start before transplanting outside.
- Lettuce, Spinach, Strawberry can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
- Direct sow Peas, Garlic, Beet straight into the garden — no transplanting needed.
- Protect tender crops from early frost with row cover — this can extend your season by several weeks.
Nearby Cities
Ready to plan your garden?
Add these crops to your garden plan and get personalized planting reminders for Zone 8b.
Start Planning Free