What to Plant in May

USDA Zone 5b

Last frost: Apr 15 – May 1 Frost-free days: 150–170

Frost may still be possible early in the month. Harden off your indoor seedlings and transplant after your last frost date. Direct sow beans, squash, and cucumbers once the soil warms.

May at a Glance

Indoor Transplant Direct Sow
1 5 10 15 20 25
Marigolds
Zinnias
Sunflowers
Nasturtiums
Cosmos
Snapdragons
Calendula
Alyssum
Dahlias
Morning Glory
Celosia
Basil
Cilantro
Dill
Parsley
Chives
Thyme
Oregano
Sage
Rosemary
Lavender
Tarragon
Tomatoes
Peppers
Eggplant
Broccoli
Cauliflower
Cabbage
Brussels Sprouts
Kale
Lettuce
Beans (bush)
Beans (pole)
Cucumbers
Summer Squash
Winter Squash
Pumpkins
Corn
Carrots
Beets
Radishes
Swiss Chard
Celery
Leeks
Okra
Sweet Potatoes
Watermelon

Transplant 33

Move these seedlings from indoors to your garden beds.

Plant now

Snapdragons
Snapdragons
Apr 15 – May 1
Parsley
Parsley
Apr 15 – May 1
4 per sq ft 70–90 days
Chives
Chives
Apr 15 – May 1
9 per sq ft 60–90 days
Broccoli
Broccoli
Apr 15 – May 1
1 per sq ft 60–100 days
Cauliflower
Cauliflower
Apr 15 – May 1
1 per sq ft 55–100 days
Cabbage
Cabbage
Apr 15 – May 1
1 per sq ft 70–100 days
Brussels Sprouts
Brussels Sprouts
Apr 15 – May 1
1 per sq ft 80–110 days
Kale
Kale
Apr 15 – May 1
1 per sq ft 50–65 days
Swiss Chard
Swiss Chard
Apr 15 – May 1
4 per sq ft 50–60 days
Leeks
Leeks
Apr 15 – May 1
4 per sq ft 90–150 days
Thyme
Thyme
May 1–8
4 per sq ft 70–90 days
Oregano
Oregano
May 1–8
1 per sq ft 60–90 days
Sage
Sage
May 1–8
1 per sq ft 75–90 days
Lavender
Lavender
May 1–8
1 per sq ft 90–120 days
Tarragon
Tarragon
May 1–8
Marigolds
Marigolds
May 5–15
Zinnias
Zinnias
May 5–15
Nasturtiums
Nasturtiums
May 5–12
Tomatoes
Tomatoes
May 5–15
1 per sq ft 65–80 days
Celery
Celery
May 5–15
4 per sq ft 80–120 days
Dahlias
Dahlias
May 10–20
Celosia
Celosia
May 10–20
Basil
Basil
May 10–20
4 per sq ft 25–35 days
Rosemary
Rosemary
May 10–17
1 per sq ft 80–120 days
Peppers
Peppers
May 10–20
1 per sq ft 60–100 days
Cucumbers
Cucumbers
May 10–20
2 per sq ft 50–70 days
Summer Squash
Summer Squash
May 10–20
Winter Squash
Winter Squash
May 10–20
Pumpkins
Pumpkins
May 10–20
¼ per sq ft 85–120 days
Eggplant
Eggplant
May 15–25
1 per sq ft 70–90 days
Okra
Okra
May 15–25
1 per sq ft 50–65 days
Watermelon
Watermelon
May 15–20
¼ per sq ft 70–90 days

Later this month

Sweet Potatoes
Sweet Potatoes
May 20 – Jun 1
1 per sq ft 90–120 days

Direct Sow 25

Plant these seeds directly into the soil outdoors.

Cilantro
Cilantro
Apr 1 – May 1
9 per sq ft 30–45 days
Lettuce
Lettuce
Apr 1 – May 15
4 per sq ft 45–60 days
Carrots
Carrots
Apr 1 – Jul 1
16 per sq ft 70–80 days
Beets
Beets
Apr 1 – Jul 1
9 per sq ft 50–70 days
Radishes
Radishes
Apr 1 – Sep 1
16 per sq ft 22–30 days
Calendula
Calendula
Apr 15 – May 1
Alyssum
Alyssum
Apr 15 – May 1
Dill
Dill
Apr 15 – Jun 1
4 per sq ft 40–60 days
Kale
Kale
Apr 15 – May 1
1 per sq ft 50–65 days
Swiss Chard
Swiss Chard
Apr 15 – May 1
4 per sq ft 50–60 days
Sunflowers
Sunflowers
May 1 – Jun 1
1 per sq ft 70–100 days
Cosmos
Cosmos
May 1 – Jun 1
Nasturtiums
Nasturtiums
May 5–15
Morning Glory
Morning Glory
May 5–15
Beans (bush)
Beans (bush)
May 5 – Jun 15
9 per sq ft 50–60 days
Beans (pole)
Beans (pole)
May 5 – Jun 1
Corn
Corn
May 5 – Jun 1
1 per sq ft 60–100 days
Marigolds
Marigolds
May 10–17
Zinnias
Zinnias
May 10 – Jun 1
Celosia
Celosia
May 10–17
Cucumbers
Cucumbers
May 10 – Jun 1
2 per sq ft 50–70 days
Summer Squash
Summer Squash
May 10 – Jun 1
Winter Squash
Winter Squash
May 10 – Jun 1
Pumpkins
Pumpkins
May 10 – Jun 1
¼ per sq ft 85–120 days
Okra
Okra
May 15–25
1 per sq ft 50–65 days

May Gardening Tips

  • Broccoli, Cabbage, Kale can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
  • Direct sow Corn, Lettuce, Kale 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.

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