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What to Plant in May in Zone 3B

Based on a last frost date of May 20 for Zone 3B. 35 plants have activity this month.

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Direct Sow in May

Sow these seeds directly in the ground this month.

Sweet Corn

Zea mays var. saccharata

Sow outdoors: May 6

~75 days to harvest

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Summer Savory

Satureja hortensis

Sow outdoors: May 6

~60 days to harvest

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Bachelor Button

Centaurea cyanus

Sow outdoors: May 6

~60 days to harvest

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Elderberry

Sambucus nigra

Sow outdoors: May 6

~730 days to harvest

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Grape Vine

Vitis vinifera

Sow outdoors: May 6

~1095 days to harvest

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Serviceberry

Amelanchier canadensis

Sow outdoors: May 6

~1095 days to harvest

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Persimmon Tree

Diospyros kaki

Sow outdoors: May 6

~1460 days to harvest

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Hydrangea

Hydrangea macrophylla

Sow outdoors: May 6

~120 days to harvest

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Azalea

Rhododendron spp. (azalea group)

Sow outdoors: May 6

~365 days to harvest

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Rhododendron

Rhododendron spp.

Sow outdoors: May 6

~365 days to harvest

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Boxwood

Buxus sempervirens

Sow outdoors: May 6

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Common Bean

Phaseolus vulgaris

Sow outdoors: May 20

~65 days to harvest

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Lima Bean

Phaseolus lunatus

Sow outdoors: May 20

~75 days to harvest

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Sweet Potato

Ipomoea batatas

Sow outdoors: May 20

~100 days to harvest

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Cosmos

Cosmos bipinnatus

Sow outdoors: May 20

~60 days to harvest

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Hosta

Hosta spp.

Sow outdoors: May 20

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Daylily

Hemerocallis spp.

Sow outdoors: May 20

~90 days to harvest

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Sunflower

Helianthus annuus

Sow outdoors: May 27

~80 days to harvest

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Zinnia

Zinnia elegans

Sow outdoors: May 27

~60 days to harvest

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Nasturtium

Tropaeolum majus

Sow outdoors: May 27

~60 days to harvest

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Borage

Borago officinalis

Sow outdoors: May 27

~60 days to harvest

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Gladiolus

Gladiolus × hortulanus

Sow outdoors: May 27

~80 days to harvest

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Butterfly Bush

Buddleja davidii

Sow outdoors: May 27

~90 days to harvest

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Crape Myrtle

Lagerstroemia indica

Sow outdoors: May 27

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Transplant Outdoors in May

Move these seedlings outside — frost danger has passed.

Chives

Allium schoenoprasum

Transplant by: May 6

~60 days to harvest

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Fennel

Foeniculum vulgare

Transplant by: May 6

~80 days to harvest

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Kohlrabi

Brassica oleracea var. gongylodes

Transplant by: May 6

~55 days to harvest

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Radicchio

Cichorium intybus

Transplant by: May 6

~80 days to harvest

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Broccoli

Brassica oleracea var. italica

Transplant by: May 20

~60 days to harvest

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Brussels Sprout

Brassica oleracea var. gemmifera

Transplant by: May 20

~84 days to harvest

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Cabbage

Brassica oleracea var. capitata

Transplant by: May 20

~70 days to harvest

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Cauliflower

Brassica oleracea var. botrytis

Transplant by: May 20

~75 days to harvest

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Collard Green

Brassica oleracea var. viridis

Transplant by: May 20

~60 days to harvest

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Dahlia

Dahlia pinnata

Transplant by: May 27

~90 days to harvest

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Celosia

Celosia argentea

Transplant by: May 27

~75 days to harvest

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