What to Plant in September
Portland, OR · Zone 8b
Last frost: Mar 15
Frost-free days: 245
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
Cilantro
Parsley
Beet
Kale
Lettuce
Peas
Radish
Spinach
Swiss Chard
Turnip
Start Indoors 1
Start these seeds indoors under grow lights or on a sunny windowsill.
Spinach
Aug 9 – Sep 23
9 per sq ft
35–50 days
Transplant 5
Move these seedlings from indoors to your garden beds.
Parsley
Feb 15 – Sep 8
4 per sq ft
70–90 days
Swiss Chard
Feb 15 – Sep 15
4 per sq ft
50–60 days
Kale
Feb 22 – Sep 8
1 per sq ft
50–65 days
Lettuce
Aug 17 – Sep 23
4 per sq ft
45–60 days
Spinach
Sep 9 – Oct 23
9 per sq ft
35–50 days
Direct Sow 5
Plant these seeds directly into the soil outdoors.
Beet
Feb 15 – Sep 15
9 per sq ft
50–70 days
Turnip
Feb 15 – Oct 8
9 per sq ft
30–60 days
Cilantro
Aug 17 – Sep 30
9 per sq ft
30–45 days
Peas
Aug 17 – Sep 8
8 per sq ft
55–70 days
Radish
Aug 17 – Oct 8
16 per sq ft
22–30 days
September Gardening Tips
- Start Spinach indoors now to give them a head start before transplanting outside.
- Lettuce, Kale, Spinach can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
- Direct sow Peas, Beet, Radish straight into the garden — no transplanting needed.
- Protect tender crops from early frost with row cover — this can extend your season by several weeks.
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