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Method
Rel. frost
Last spring frost (0°C) 27 May Frost 1 of 10 years · 20 years of data
Frost-free season 143 days 27 May – 17 Oct
Probability that frost is over

90% = 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)
8 – 22 Apr
14 Jun
5-7 wk
27 May
19 Jul
0 wk
31 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
15 – 29 Apr
26 Jun
4-6 wk
27 May
24 Jul
0 wk
31 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
19 Mar – 16 Apr
8-12 wk
11 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
8 – 22 Apr
9 Jun
5-7 wk
27 May
14 Jul
0 wk
27 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
14 – 21 May
15 May
3-4 wk
11 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
4 – 11 Jun
6 Jun
4-5 wk
9 Jul
6 wk after
15 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
16 – 23 Jun
3-4 wk
14 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
4 Mar – 1 Apr
30 Mar
8-12 wk
27 May
0 wk
17 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
31 May
14 Jun
1 wk after
31 May
4 Jun
1 wk after
Maize
Zea mays
Greenhouse
30 Apr – 7 May
5 May
3-4 wk
28 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
7 – 14 May
3 Jul
3-4 wk
4 Jun
24 Jul
1 wk after
17 Jun
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
27 May
4 Jul
0 wk
27 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
8 – 22 Apr
9 Jun
5-7 wk
27 May
14 Jul
0 wk
27 May
4 Jul
0 wk
Potato
Solanum tuberosum
1 – 15 May
6 Jun
4-6 wk
12 Jun
4 Jul
2 wk after
12 Jun
24 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
8 – 22 Apr
19 Jun
5-7 wk
27 May
24 Jul
0 wk
31 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
26 May – 2 Jun
3-4 wk
23 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
7 – 14 May
22 Jun
3-4 wk
4 Jun
13 Jul
1 wk after
17 Jun
3 Jul
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
15 – 29 Apr
21 Jun
4-6 wk
27 May
19 Jul
0 wk
Lettuce
Lactuca sativa
29 Apr – 6 May
8 Jul
3-4 wk
27 May
29 Jul
0 wk
31 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
15 – 29 Apr
21 Jun
4-6 wk
27 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
29 Apr – 13 May
31 May
2-4 wk
27 May
14 Jun
0 wk
27 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
31 May
14 Jun
1 wk after
31 May
4 Jun
1 wk after
Spinach
Spinacia oleracea
29 Apr – 6 May
23 Jul
3-4 wk
27 May
13 Aug
0 wk
23 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
28 Jun – 12 Jul
4-6 wk
9 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
2 – 16 Apr
14 Apr
6-8 wk
28 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
14 – 28 May
22 May
2-4 wk
11 Jun
2 wk after
1 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
15 – 29 Apr
21 Jun
4-6 wk
27 May
19 Jul
0 wk
Garden pea
Pisum sativum
29 Apr – 6 May
23 Jun
3-4 wk
27 May
14 Jul
0 wk
31 May
4 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
30 Apr – 14 May
19 May
4-6 wk
11 Jun
16 Jun
2 wk after
Lemon balm
Melissa officinalis
18 Mar – 1 Apr
19 May
8-10 wk
27 May
14 Jul
0 wk
1 Jul
4 Jul
5 wk after
Dill
Anethum graveolens
31 May
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
1 – 15 Apr
2 Jun
6-8 wk
27 May
14 Jul
0 wk
31 May
4 Jul
1 wk after
Spearmint
Mentha spicata
4 Mar – 1 Apr
19 May
8-12 wk
27 May
14 Jul
0 wk
1 Jul
4 Jul
5 wk after
Coriander
Coriandrum sativum
27 May
13 Aug
0 wk
17 Jun
3 Aug
3 wk after
Garden sage
Salvia officinalis
26 Mar – 9 Apr
4 May
8-10 wk
4 Jun
29 Jun
1 wk after
Common thyme
Thymus vulgaris
18 Mar – 1 Apr
9 May
8-10 wk
27 May
4 Jul
0 wk
Oregano
Origanum vulgare
1 – 15 Apr
23 May
6-8 wk
27 May
4 Jul
0 wk
1 Jul
5 wk after
Parsley
Petroselinum crispum
1 – 15 Apr
23 May
6-8 wk
27 May
4 Jul
0 wk
31 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
26 Feb – 26 Mar
5 Apr
10-14 wk
4 Jun
14 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
Greenhouse
14 – 21 May
26 May
3-4 wk
11 Jun
16 Jun
2 wk after
Cornflower
Centaurea cyanus
27 May
14 Jul
0 wk
31 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
2 – 16 Apr
23 Apr
8-10 wk
11 Jun
18 Jun
2 wk after
Sweet William
Dianthus barbatus
1 – 15 Apr
6-8 wk
27 May
0 wk
12 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
16 – 30 Apr
7 May
6-8 wk
11 Jun
18 Jun
2 wk after
25 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
20 Apr – 4 May
25 Apr
6-8 wk
15 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
6 May – 3 Jun
9 May
4-8 wk
1 Jul
5 wk after
1 Jul
5 wk after
Foxglove
Digitalis purpurea
18 Mar – 1 Apr
8-10 wk
27 May
0 wk
17 Jun
3 wk after
Busy lizzie
Impatiens walleriana
16 Apr – 14 May
16 May
8-12 wk
9 Jul
11 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
28 Apr – 12 May
6-8 wk
23 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
12 – 26 May
4-6 wk
23 Jun
4 wk after
Chinese lantern
Physalis alkekengi
26 Mar – 9 Apr
19 Apr
8-10 wk
4 Jun
14 Jun
1 wk after
Love in a mist
Nigella damascena
27 May
29 Jun
0 wk
31 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
16 – 30 Apr
27 Apr
6-8 wk
11 Jun
2 wk after
25 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
12 Mar – 9 Apr
19 Apr
8-12 wk
4 Jun
14 Jun
1 wk after
Cardoon
Cynara cardunculus
31 Mar – 28 Apr
8-12 wk
23 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
19 Mar – 16 Apr
11 Apr
8-12 wk
11 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
16 – 30 Apr
25 Apr
6-8 wk
11 Jun
2 wk after
Corn poppy
Papaver rhoeas
27 May
14 Jul
0 wk
31 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
4 Mar – 1 Apr
9 May
8-12 wk
27 May
4 Jul
0 wk
12 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
14 – 28 Apr
3 May
8-10 wk
23 Jun
28 Jun
4 wk after
Sweet pea
Lathyrus odoratus
1 – 22 Apr
30 May
5-8 wk
27 May
4 Jul
0 wk
Stock
Matthiola incana
1 – 15 Apr
2 Jun
6-8 wk
27 May
14 Jul
0 wk
17 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
1 – 15 Apr
3 May
6-8 wk
27 May
14 Jun
0 wk
17 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
30 Apr – 14 May
4 May
4-6 wk
11 Jun
2 wk after
Garden pansy
Viola × wittrockiana
18 Mar – 1 Apr
19 May
8-10 wk
27 May
14 Jul
0 wk
12 Jun
4 Jul
2 wk after
Petunia
Petunia
Fleece
19 Mar – 16 Apr
23 Apr
8-12 wk
11 Jun
18 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
9 – 23 Apr
3 May
6-8 wk
4 Jun
14 Jun
1 wk after
15 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
30 Apr – 14 May
19 May
4-6 wk
11 Jun
16 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
7 – 21 May
26 May
3-5 wk
11 Jun
16 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
12 – 26 May
4-6 wk
23 Jun
4 wk after
15 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
16 Apr – 14 May
20 Apr
8-12 wk
9 Jul
6 wk after
Bee balm
Monarda didyma
4 Mar – 1 Apr
19 Apr
8-12 wk
27 May
14 Jun
0 wk
1 Jul
5 wk after
Yarrow
Achillea millefolium
1 – 15 Apr
3 Apr
6-8 wk
27 May
0 wk
17 Jun
3 wk after
Safflower
Carthamus tinctorius
27 May
14 Jun
0 wk
31 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
1 – 15 Apr
23 May
6-8 wk
27 May
4 Jul
0 wk
9 May
24 Jun
3 wk before
Bishop's flower
Ammi majus
15 – 29 Apr
6 Jun
4-6 wk
27 May
4 Jul
0 wk
17 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
19 Mar – 2 Apr
26 Mar
10-12 wk
11 Jun
2 wk after
Sunflower
Helianthus annuus
26 May – 2 Jun
13 Jun
3-4 wk
23 Jun
4 Jul
4 wk after
1 Jul
5 wk after
China aster
Callistephus chinensis
28 Apr – 12 May
2 Jun
6-8 wk
23 Jun
14 Jul
4 wk after
15 Jul
7 wk after
Annual phlox
Phlox drummondii
16 – 30 Apr
22 Apr
6-8 wk
11 Jun
2 wk after
15 Jul
7 wk after
Hollyhock
Alcea rosea
1 – 15 Apr
6-8 wk
27 May
0 wk
17 Jun
3 wk after
Alpine delphinium
Delphinium elatum
4 Mar – 1 Apr
19 Apr
8-12 wk
27 May
14 Jun
0 wk
1 Jul
5 wk after
African marigold
Tagetes erecta
28 Apr – 12 May
6-8 wk
23 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
9 – 23 Apr
23 May
6-8 wk
4 Jun
4 Jul
1 wk after
15 Jul
7 wk after
Wood sage
Salvia nemorosa
18 Mar – 1 Apr
9 Apr
8-10 wk
27 May
4 Jun
0 wk
1 Jul
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
2 – 30 Apr
5 May
6-10 wk
11 Jun
16 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
27 May
14 Jul
0 wk
31 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
14 – 28 Apr
9 May
8-10 wk
23 Jun
4 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
1 – 15 Apr
3 May
6-8 wk
27 May
14 Jun
0 wk
17 Jun
3 wk after