What should I plant in March in Portland, OR?

In March in Portland, OR (zone 8b), you can plant Chives, Cilantro, Mint, Oregano, Parsley, and more. These dates are based on local climate data for your area.

When do I plant Chives in Portland, OR?

In Portland, OR (zone 8b), Chives: start seeds indoors Jan 1 – Apr 23 and Oct 24 – Dec 31, transplant outdoors Jan 1 – Jun 30.

When do I plant Cilantro in Portland, OR?

In Portland, OR (zone 8b), Cilantro: direct sow Feb 15 – Jul 23 and Aug 17 – Sep 30.

When do I plant Mint in Portland, OR?

In Portland, OR (zone 8b), Mint: start seeds indoors Jan 1 – Apr 30 and Nov 1 – Dec 31, transplant outdoors Jan 1 – Jun 30.

What to Plant in March

Portland, OR · Zone 8b

Last frost: Mar 15 Frost-free days: 245

Full year calendar for Portland

Your last frost is behind you or nearly so. Warm-season crops can go in the ground soon. Direct sow beans, squash, and cucumbers as the soil warms up.

March at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Chives

Cilantro

Mint

Oregano

Parsley

Sage

Thyme

Artichoke

Beet

Broccoli

Brussels Sprouts

Cabbage

Carrot

Cauliflower

Celery

Garlic

Kale

Leek

Lettuce

Onion

Peas

Potato

Radish

Spinach

Strawberry

Swiss Chard

Turnip

Start Indoors 19

Start these seeds indoors under grow lights or on a sunny windowsill.

Chives

Jan 1 – Apr 23

9 per sq ft 60–90 days

Mint

Jan 1 – Apr 30

4 per sq ft 60–90 days

Parsley

Jan 1 – Jun 30

4 per sq ft 70–90 days

Brussels Sprouts

Jan 1 – Mar 31

1 per sq ft 80–110 days

Leek

Jan 1 – May 16

4 per sq ft 90–150 days

Onion

Jan 1 – May 23

9 per sq ft 100–120 days

Spinach

Jan 1 – May 23

9 per sq ft 35–50 days

Strawberry

Jan 1 – May 16

4 per sq ft 60–90 days

Broccoli

Jan 9 – Jun 30

1 per sq ft 60–100 days

Cabbage

Jan 9 – Jun 30

1 per sq ft 70–100 days

Cauliflower

Jan 9 – Jun 30

1 per sq ft 55–100 days

Celery

Jan 9 – Apr 23

4 per sq ft 80–120 days

Kale

Jan 9 – Jul 23

1 per sq ft 50–65 days

Lettuce

Jan 17 – Jun 23

4 per sq ft 45–60 days

Swiss Chard

Jan 17 – Aug 16

4 per sq ft 50–60 days

Thyme

Jan 24 – Apr 8

4 per sq ft 70–90 days

Artichoke

Jan 24 – May 16

1 per sq ft 85–100 days

Oregano

Feb 8 – Apr 30

1 per sq ft 60–90 days

Sage

Feb 8 – Apr 15

1 per sq ft 75–90 days

Transplant 14

Move these seedlings from indoors to your garden beds.

Chives

Jan 1 – Jun 30

9 per sq ft 60–90 days

Mint

Jan 1 – Jun 30

4 per sq ft 60–90 days

Spinach

Jan 1 – Jun 23

9 per sq ft 35–50 days

Strawberry

Jan 1 – Jun 30

4 per sq ft 60–90 days

Parsley

Feb 15 – Sep 8

4 per sq ft 70–90 days

Lettuce

Feb 15 – Jul 23

4 per sq ft 45–60 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

Leek

Feb 22 – Aug 8

4 per sq ft 90–150 days

Onion

Feb 22 – Aug 16

9 per sq ft 100–120 days

Broccoli

Mar 1 – Aug 23

1 per sq ft 60–100 days

Brussels Sprouts

Mar 1 – Aug 8

1 per sq ft 80–110 days

Cabbage

Mar 1 – Aug 23

1 per sq ft 70–100 days

Cauliflower

Mar 1 – Aug 23

1 per sq ft 55–100 days

Direct Sow 8

Plant these seeds directly into the soil outdoors.

Plant now

Garlic

Jan 1 – Aug 23

9 per sq ft 180–240 days

Cilantro

Feb 15 – Jul 23

9 per sq ft 30–45 days

Beet

Feb 15 – Sep 15

9 per sq ft 50–70 days

Peas

Feb 15 – Jul 16

8 per sq ft 55–70 days

Turnip

Feb 15 – Oct 8

9 per sq ft 30–60 days

Radish

Mar 1 – Jul 23

16 per sq ft 22–30 days

Carrot

Mar 9 – Aug 16

16 per sq ft 70–80 days

Later this month

Potato

Mar 24 – Jul 8

1 per sq ft 70–150 days

March Gardening Tips

Start Lettuce, Broccoli, Cabbage indoors now to give them a head start before transplanting outside.
Lettuce, Broccoli, Cabbage can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
Direct sow Carrot, Peas, Potato straight into the garden — no transplanting needed.
Add compost to beds now so nutrients are available when planting time arrives.