What should I plant in May in Boise, ID?

In May in Boise, ID (zone 6b), you can plant Basil, Chives, Cilantro, Dill, Mint, and more. These dates are based on local climate data for your area.

When do I plant Basil in Boise, ID?

In Boise, ID (zone 6b), Basil: start seeds indoors Apr 24 – Jun 15, transplant outdoors Jun 9 – Jul 31.

When do I plant Chives in Boise, ID?

In Boise, ID (zone 6b), Chives: start seeds indoors Jan 1 – Apr 15, transplant outdoors Mar 9 – Jun 23.

When do I plant Cilantro in Boise, ID?

In Boise, ID (zone 6b), Cilantro: direct sow Mar 1 – Jun 23 and Sep 9 – Sep 23.

What to Plant in May

Boise, ID · Zone 6b

Last frost: Apr 15 Frost-free days: 183

Full year calendar for Boise

Frost is behind you and the soil is warm — this is prime planting season. Most warm-season crops can go directly into the ground now. Transplant the seedlings you started indoors.

May at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Basil

Chives

Cilantro

Dill

Mint

Oregano

Parsley

Sage

Thyme

Artichoke

Beans (Bush)

Beet

Broccoli

Brussels Sprouts

Cabbage

Carrot

Cauliflower

Celery

Garlic

Kale

Leek

Lettuce

Onion

Peas

Potato

Radish

Spinach

Squash

Strawberry

Swiss Chard

Turnip

Zucchini

Start Indoors 10

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

Parsley

Jan 1 – May 16

4 per sq ft 70–90 days

Broccoli

Jan 17 – May 8

1 per sq ft 60–100 days

Cabbage

Jan 17 – May 8

1 per sq ft 70–100 days

Cauliflower

Jan 17 – May 8

1 per sq ft 55–100 days

Kale

Jan 24 – Jun 8

1 per sq ft 50–65 days

Lettuce

Feb 8 – May 23

4 per sq ft 45–60 days

Swiss Chard

Feb 8 – Jun 23

4 per sq ft 50–60 days

Basil

Apr 24 – Jun 15

4 per sq ft 25–35 days

Squash

May 1 – Jun 8

1 per sq ft 45–65 days

Zucchini

May 1 – Jun 8

1 per sq ft 45–60 days

Transplant 21

Move these seedlings from indoors to your garden beds.

Plant now

Chives

Mar 9 – Jun 23

9 per sq ft 60–90 days

Mint

Mar 9 – Jun 15

4 per sq ft 60–90 days

Parsley

Mar 9 – Jul 23

4 per sq ft 70–90 days

Broccoli

Mar 9 – Jun 30

1 per sq ft 60–100 days

Brussels Sprouts

Mar 9 – Jun 30

1 per sq ft 80–110 days

Cabbage

Mar 9 – Jun 30

1 per sq ft 70–100 days

Cauliflower

Mar 9 – Jun 30

1 per sq ft 55–100 days

Kale

Mar 9 – Jul 23

1 per sq ft 50–65 days

Leek

Mar 9 – Jun 23

4 per sq ft 90–150 days

Lettuce

Mar 9 – Jun 23

4 per sq ft 45–60 days

Onion

Mar 9 – Jun 30

9 per sq ft 100–120 days

Spinach

Mar 9 – May 31

9 per sq ft 35–50 days

Strawberry

Mar 9 – Jun 15

4 per sq ft 60–90 days

Swiss Chard

Mar 9 – Jul 23

4 per sq ft 50–60 days

Oregano

Apr 16 – Jun 15

1 per sq ft 60–90 days

Sage

Apr 16 – May 23

1 per sq ft 75–90 days

Thyme

Apr 16 – May 31

4 per sq ft 70–90 days

Artichoke

Apr 16 – Jun 30

1 per sq ft 85–100 days

Celery

Apr 16 – Jun 30

4 per sq ft 80–120 days

Later this month

Squash

May 24 – Jun 30

1 per sq ft 45–65 days

Zucchini

May 24 – Jun 30

1 per sq ft 45–60 days

Direct Sow 10

Plant these seeds directly into the soil outdoors.

Garlic

Jan 1 – Jun 30

9 per sq ft 180–240 days

Cilantro

Mar 1 – Jun 23

9 per sq ft 30–45 days

Beet

Mar 1 – Jul 23

9 per sq ft 50–70 days

Peas

Mar 1 – Jun 23

8 per sq ft 55–70 days

Radish

Mar 1 – Jun 23

16 per sq ft 22–30 days

Turnip

Mar 1 – Jul 23

9 per sq ft 30–60 days

Carrot

Mar 9 – Jul 23

16 per sq ft 70–80 days

Potato

Apr 1 – Jul 23

1 per sq ft 70–150 days

Dill

May 1 – Jul 23

4 per sq ft 40–60 days

Beans (Bush)

May 1 – Jun 30

9 per sq ft 50–60 days

May Gardening Tips

Start Squash, Zucchini, Lettuce indoors now to give them a head start before transplanting outside.
Squash, Zucchini, Lettuce can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
Direct sow Beans (Bush), Carrot, Peas straight into the garden — no transplanting needed.
Mulch around transplants with 2–3 inches of straw or shredded leaves to retain moisture and suppress weeds.