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Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 10 years · 20 years of data
Frost-free season 141 days 22 May – 10 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)
3 – 17 Apr
16 Jun
5-7 wk
22 May
21 Jul
0 wk
26 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
28 Jun
4-6 wk
22 May
26 Jul
0 wk
26 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
14 Mar – 11 Apr
8-12 wk
6 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Apr
11 Jun
5-7 wk
22 May
16 Jul
0 wk
22 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
9 – 16 May
18 May
3-4 wk
6 Jun
8 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
30 May – 6 Jun
8 Jun
4-5 wk
4 Jul
6 Jul
6 wk after
10 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
11 – 18 Jun
3-4 wk
9 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
1 Apr
8-12 wk
22 May
27 May
0 wk
12 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
26 May
16 Jun
1 wk after
26 May
6 Jun
1 wk after
Maize
Zea mays
Greenhouse
25 Apr – 2 May
8 May
3-4 wk
23 May
29 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 May
5 Jul
3-4 wk
30 May
26 Jul
1 wk after
12 Jun
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
6 Jul
0 wk
22 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Apr
11 Jun
5-7 wk
22 May
16 Jul
0 wk
22 May
6 Jul
0 wk
Potato
Solanum tuberosum
26 Apr – 10 May
8 Jun
4-6 wk
7 Jun
6 Jul
2 wk after
7 Jun
26 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Apr
21 Jun
5-7 wk
22 May
26 Jul
0 wk
26 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
21 – 28 May
23 May
3-4 wk
18 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 May
16 Jun
3-4 wk
30 May
7 Jul
1 wk after
12 Jun
27 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
23 Jun
4-6 wk
22 May
21 Jul
0 wk
Lettuce
Lactuca sativa
24 Apr – 1 May
10 Jul
3-4 wk
22 May
31 Jul
0 wk
26 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Apr
23 Jun
4-6 wk
22 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
2 Jun
2-4 wk
22 May
16 Jun
0 wk
22 May
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
26 May
16 Jun
1 wk after
26 May
6 Jun
1 wk after
Spinach
Spinacia oleracea
24 Apr – 1 May
25 Jul
3-4 wk
22 May
15 Aug
0 wk
18 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
23 Jun – 7 Jul
4-6 wk
4 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
28 Mar – 11 Apr
17 Apr
6-8 wk
23 May
29 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
9 – 23 May
25 May
2-4 wk
6 Jun
8 Jun
2 wk after
26 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
23 Jun
4-6 wk
22 May
21 Jul
0 wk
Garden pea
Pisum sativum
24 Apr – 1 May
25 Jun
3-4 wk
22 May
16 Jul
0 wk
26 May
6 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
Fleece
7 – 21 May
4-6 wk
18 Jun
4 wk after
Lemon balm
Melissa officinalis
13 – 27 Mar
21 May
8-10 wk
22 May
16 Jul
0 wk
26 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
26 May
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
27 Mar – 10 Apr
4 Jun
6-8 wk
22 May
16 Jul
0 wk
26 May
6 Jul
1 wk after
Spearmint
Mentha spicata
27 Feb – 27 Mar
21 May
8-12 wk
22 May
16 Jul
0 wk
26 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
22 May
15 Aug
0 wk
12 Jun
5 Aug
3 wk after
Garden sage
Salvia officinalis
21 Mar – 4 Apr
6 May
8-10 wk
30 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
13 – 27 Mar
11 May
8-10 wk
22 May
6 Jul
0 wk
Oregano
Origanum vulgare
27 Mar – 10 Apr
25 May
6-8 wk
22 May
6 Jul
0 wk
26 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
27 Mar – 10 Apr
25 May
6-8 wk
22 May
6 Jul
0 wk
26 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
21 Feb – 21 Mar
7 Apr
10-14 wk
30 May
16 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
Fleece
21 – 28 May
3-4 wk
18 Jun
4 wk after
Cornflower
Centaurea cyanus
22 May
16 Jul
0 wk
26 May
6 Jul
1 wk after
Statice
Limonium sinuatum
9 – 23 Apr
8-10 wk
18 Jun
4 wk after
Sweet William
Dianthus barbatus
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
7 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
23 Apr – 7 May
6-8 wk
18 Jun
4 wk after
4 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
15 – 29 Apr
28 Apr
6-8 wk
10 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
1 – 29 May
12 May
4-8 wk
26 Jun
5 wk after
26 Jun
5 wk after
Foxglove
Digitalis purpurea
13 – 27 Mar
8-10 wk
22 May
0 wk
12 Jun
3 wk after
Busy lizzie
Impatiens walleriana
11 Apr – 9 May
19 May
8-12 wk
4 Jul
14 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
23 Apr – 7 May
30 Apr
6-8 wk
18 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
7 – 21 May
4-6 wk
18 Jun
4 wk after
Chinese lantern
Physalis alkekengi
21 Mar – 4 Apr
21 Apr
8-10 wk
30 May
16 Jun
1 wk after
Love in a mist
Nigella damascena
22 May
1 Jul
0 wk
26 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
23 Apr – 7 May
6-8 wk
18 Jun
4 wk after
4 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
7 Mar – 4 Apr
21 Apr
8-12 wk
30 May
16 Jun
1 wk after
Cardoon
Cynara cardunculus
26 Mar – 23 Apr
8-12 wk
18 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
14 Mar – 11 Apr
14 Apr
8-12 wk
6 Jun
9 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
11 – 25 Apr
28 Apr
6-8 wk
6 Jun
9 Jun
2 wk after
Corn poppy
Papaver rhoeas
22 May
16 Jul
0 wk
26 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
27 Feb – 27 Mar
11 May
8-12 wk
22 May
6 Jul
0 wk
7 Jun
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
25 Apr – 9 May
8-10 wk
4 Jul
6 wk after
Sweet pea
Lathyrus odoratus
27 Mar – 17 Apr
1 Jun
5-8 wk
22 May
6 Jul
0 wk
Stock
Matthiola incana
27 Mar – 10 Apr
4 Jun
6-8 wk
22 May
16 Jul
0 wk
12 Jun
6 Jul
3 wk after
Wormwood
Artemisia absinthium
27 Mar – 10 Apr
5 May
6-8 wk
22 May
16 Jun
0 wk
12 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
25 Apr – 9 May
7 May
4-6 wk
6 Jun
2 wk after
Garden pansy
Viola × wittrockiana
13 – 27 Mar
21 May
8-10 wk
22 May
16 Jul
0 wk
7 Jun
6 Jul
2 wk after
Petunia
Petunia
26 Mar – 23 Apr
6 Apr
8-12 wk
18 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Apr
5 May
6-8 wk
30 May
16 Jun
1 wk after
10 Jul
7 wk after
Common zinnia
Zinnia elegans
7 – 21 May
4-6 wk
18 Jun
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
14 – 28 May
3-5 wk
18 Jun
4 wk after
Garden cosmos
Cosmos bipinnatus
7 – 21 May
12 May
4-6 wk
18 Jun
4 wk after
10 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
11 Apr – 9 May
23 Apr
8-12 wk
4 Jul
6 wk after
Bee balm
Monarda didyma
27 Feb – 27 Mar
21 Apr
8-12 wk
22 May
16 Jun
0 wk
26 Jun
5 wk after
Yarrow
Achillea millefolium
27 Mar – 10 Apr
5 Apr
6-8 wk
22 May
0 wk
12 Jun
3 wk after
Safflower
Carthamus tinctorius
22 May
16 Jun
0 wk
26 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
27 Mar – 10 Apr
25 May
6-8 wk
22 May
6 Jul
0 wk
4 May
26 Jun
3 wk before
Bishop's flower
Ammi majus
10 – 24 Apr
8 Jun
4-6 wk
22 May
6 Jul
0 wk
12 Jun
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
26 Mar – 9 Apr
10-12 wk
18 Jun
4 wk after
Sunflower
Helianthus annuus
21 – 28 May
15 Jun
3-4 wk
18 Jun
6 Jul
4 wk after
26 Jun
26 Jun
5 wk after
China aster
Callistephus chinensis
23 Apr – 7 May
4 Jun
6-8 wk
18 Jun
16 Jul
4 wk after
10 Jul
7 wk after
Annual phlox
Phlox drummondii
11 – 25 Apr
30 Apr
6-8 wk
6 Jun
11 Jun
2 wk after
10 Jul
7 wk after
Hollyhock
Alcea rosea
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
12 Jun
3 wk after
Alpine delphinium
Delphinium elatum
27 Feb – 27 Mar
21 Apr
8-12 wk
22 May
16 Jun
0 wk
26 Jun
5 wk after
African marigold
Tagetes erecta
23 Apr – 7 May
30 Apr
6-8 wk
18 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Apr
25 May
6-8 wk
30 May
6 Jul
1 wk after
10 Jul
7 wk after
Wood sage
Salvia nemorosa
13 – 27 Mar
11 Apr
8-10 wk
22 May
6 Jun
0 wk
26 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
9 Apr – 7 May
17 Apr
6-10 wk
18 Jun
4 wk after
California goldenpoppy
Eschscholzia californica
22 May
16 Jul
0 wk
26 May
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
9 – 23 Apr
11 May
8-10 wk
18 Jun
6 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
27 Mar – 10 Apr
5 May
6-8 wk
22 May
16 Jun
0 wk
12 Jun
3 wk after