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Method
Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 4 years · 20 years of data
Frost-free season 144 days 22 May – 13 Oct
Probability that frost is over

75% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
3 – 17 Apr
13 Jun
5-7 wk
22 May
18 Jul
0 wk
23 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
25 Jun
4-6 wk
22 May
23 Jul
0 wk
23 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
19 Mar – 16 Apr
9 Apr
8-12 wk
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Apr
8 Jun
5-7 wk
22 May
13 Jul
0 wk
22 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
28 May – 4 Jun
3 Jun
3-4 wk
25 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 May
5 Jun
4-5 wk
25 Jun
3 Jul
5 wk after
4 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
4 – 11 Jun
3-4 wk
2 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
29 Mar
8-12 wk
22 May
24 May
0 wk
4 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
13 Jun
0 wk
23 May
3 Jun
0 wk
Maize
Zea mays
14 – 21 May
24 May
3-4 wk
11 Jun
14 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Apr – 7 May
2 Jul
3-4 wk
28 May
23 Jul
1 wk after
4 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
3 Jul
0 wk
22 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Apr
8 Jun
5-7 wk
22 May
13 Jul
0 wk
22 May
3 Jul
0 wk
Potato
Solanum tuberosum
20 Apr – 4 May
1 Jun
4-6 wk
1 Jun
29 Jun
1 wk after
1 Jun
19 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Apr
18 Jun
5-7 wk
22 May
23 Jul
0 wk
23 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
28 May – 4 Jun
18 Jun
3-4 wk
25 Jun
9 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Apr – 7 May
16 Jun
3-4 wk
28 May
7 Jul
1 wk after
4 Jun
27 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
20 Jun
4-6 wk
22 May
18 Jul
0 wk
Lettuce
Lactuca sativa
24 Apr – 1 May
7 Jul
3-4 wk
22 May
28 Jul
0 wk
23 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Apr
20 Jun
4-6 wk
22 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
30 May
2-4 wk
22 May
13 Jun
0 wk
22 May
3 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
13 Jun
0 wk
23 May
3 Jun
0 wk
Spinach
Spinacia oleracea
24 Apr – 1 May
22 Jul
3-4 wk
22 May
12 Aug
0 wk
19 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
16 – 30 Apr
3 May
6-8 wk
11 Jun
14 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
14 – 28 May
20 Jun
2-4 wk
11 Jun
4 Jul
3 wk after
4 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
20 Jun
4-6 wk
22 May
18 Jul
0 wk
Garden pea
Pisum sativum
24 Apr – 1 May
22 Jun
3-4 wk
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
14 – 28 May
27 May
4-6 wk
25 Jun
5 wk after
Lemon balm
Melissa officinalis
13 – 27 Mar
18 May
8-10 wk
22 May
13 Jul
0 wk
16 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
23 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
27 Mar – 10 Apr
1 Jun
6-8 wk
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Spearmint
Mentha spicata
27 Feb – 27 Mar
18 May
8-12 wk
22 May
13 Jul
0 wk
16 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
22 May
12 Aug
0 wk
4 Jun
2 Aug
2 wk after
Garden sage
Salvia officinalis
19 Mar – 2 Apr
3 May
8-10 wk
28 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
13 – 27 Mar
8 May
8-10 wk
22 May
3 Jul
0 wk
Oregano
Origanum vulgare
27 Mar – 10 Apr
22 May
6-8 wk
22 May
3 Jul
0 wk
16 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
27 Mar – 10 Apr
22 May
6-8 wk
22 May
3 Jul
0 wk
23 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
19 Feb – 19 Mar
4 Apr
10-14 wk
28 May
13 Jun
1 wk after

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
28 May – 4 Jun
3 Jun
3-4 wk
25 Jun
5 wk after
Cornflower
Centaurea cyanus
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Statice
Limonium sinuatum
2 – 16 Apr
8 May
8-10 wk
11 Jun
3 Jul
3 wk after
Sweet William
Dianthus barbatus
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
1 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
16 – 30 Apr
22 May
6-8 wk
11 Jun
3 Jul
3 wk after
28 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
11 – 25 Apr
22 May
6-8 wk
6 Jun
3 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
21 Apr – 19 May
5 Jun
4-8 wk
16 Jun
3 Jul
4 wk after
16 Jun
23 Jun
4 wk after
Foxglove
Digitalis purpurea
13 – 27 Mar
8-10 wk
22 May
0 wk
4 Jun
2 wk after
Busy lizzie
Impatiens walleriana
2 – 30 Apr
28 Jun
8-12 wk
25 Jun
23 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
16 – 30 Apr
1 Jun
6-8 wk
11 Jun
13 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
30 Apr – 14 May
11 May
4-6 wk
11 Jun
3 wk after
Chinese lantern
Physalis alkekengi
19 Mar – 2 Apr
18 Apr
8-10 wk
28 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
22 May
28 Jun
0 wk
23 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
16 – 30 Apr
12 May
6-8 wk
11 Jun
23 Jun
3 wk after
28 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
5 Mar – 2 Apr
18 Apr
8-12 wk
28 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
19 Mar – 16 Apr
19 Mar
8-12 wk
11 Jun
3 wk after
Regal-foxtail
Ptilotus nobilis
2 – 30 Apr
19 Apr
8-12 wk
25 Jun
5 wk after
Globe amaranth
Gomphrena globosa
30 Apr – 14 May
3 May
6-8 wk
25 Jun
5 wk after
Corn poppy
Papaver rhoeas
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
27 Feb – 27 Mar
8 May
8-12 wk
22 May
3 Jul
0 wk
1 Jun
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
16 – 30 Apr
18 May
8-10 wk
25 Jun
13 Jul
5 wk after
Sweet pea
Lathyrus odoratus
27 Mar – 17 Apr
29 May
5-8 wk
22 May
3 Jul
0 wk
Stock
Matthiola incana
27 Mar – 10 Apr
1 Jun
6-8 wk
22 May
13 Jul
0 wk
4 Jun
3 Jul
2 wk after
Wormwood
Artemisia absinthium
27 Mar – 10 Apr
2 May
6-8 wk
22 May
13 Jun
0 wk
4 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
14 – 28 May
4-6 wk
25 Jun
5 wk after
Garden pansy
Viola × wittrockiana
13 – 27 Mar
18 May
8-10 wk
22 May
13 Jul
0 wk
1 Jun
3 Jul
1 wk after
Petunia
Petunia
19 Mar – 16 Apr
8 May
8-12 wk
11 Jun
3 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
2 – 16 Apr
2 May
6-8 wk
28 May
13 Jun
1 wk after
4 Jul
6 wk after
Common zinnia
Zinnia elegans
30 Apr – 14 May
10 Jun
4-6 wk
11 Jun
8 Jul
3 wk after
Common morning glory
Ipomoea purpurea
21 May – 4 Jun
3 Jun
3-5 wk
25 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
30 Apr – 14 May
5 Jun
4-6 wk
11 Jun
3 Jul
3 wk after
4 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
14 Apr – 12 May
19 May
8-12 wk
7 Jul
14 Jul
7 wk after
Bee balm
Monarda didyma
27 Feb – 27 Mar
18 Apr
8-12 wk
22 May
13 Jun
0 wk
16 Jun
4 wk after
Yarrow
Achillea millefolium
27 Mar – 10 Apr
2 Apr
6-8 wk
22 May
0 wk
4 Jun
2 wk after
Safflower
Carthamus tinctorius
22 May
13 Jun
0 wk
23 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
27 Mar – 10 Apr
22 May
6-8 wk
22 May
3 Jul
0 wk
6 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
10 – 24 Apr
5 Jun
4-6 wk
22 May
3 Jul
0 wk
4 Jun
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
2 – 16 Apr
10-12 wk
25 Jun
5 wk after
Sunflower
Helianthus annuus
14 – 21 May
12 Jun
3-4 wk
11 Jun
3 Jul
3 wk after
16 Jun
23 Jun
4 wk after
China aster
Callistephus chinensis
16 – 30 Apr
1 Jun
6-8 wk
11 Jun
13 Jul
3 wk after
4 Jul
6 wk after
Annual phlox
Phlox drummondii
7 – 21 Apr
1 Jun
6-8 wk
2 Jun
13 Jul
2 wk after
4 Jul
6 wk after
Hollyhock
Alcea rosea
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
4 Jun
2 wk after
Alpine delphinium
Delphinium elatum
27 Feb – 27 Mar
18 Apr
8-12 wk
22 May
13 Jun
0 wk
16 Jun
4 wk after
African marigold
Tagetes erecta
16 – 30 Apr
1 Jun
6-8 wk
11 Jun
13 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
2 – 16 Apr
22 May
6-8 wk
28 May
3 Jul
1 wk after
4 Jul
6 wk after
Wood sage
Salvia nemorosa
13 – 27 Mar
8 Apr
8-10 wk
22 May
3 Jun
0 wk
16 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
16 Apr – 14 May
13 May
6-10 wk
25 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
2 – 16 Apr
8 May
8-10 wk
11 Jun
3 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
27 Mar – 10 Apr
2 May
6-8 wk
22 May
13 Jun
0 wk
4 Jun
2 wk after