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Rel. frost
Last spring frost (0°C) 20 May Frost 1 of 10 years · 20 years of data
Frost-free season 154 days 20 May – 21 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)
1 – 15 Apr
16 Jun
5-7 wk
20 May
21 Jul
0 wk
24 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
28 Jun
4-6 wk
20 May
26 Jul
0 wk
24 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
12 Mar – 9 Apr
8-12 wk
4 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
11 Jun
5-7 wk
20 May
16 Jul
0 wk
20 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
7 – 14 May
6 Jun
3-4 wk
4 Jun
27 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
28 May – 4 Jun
8 Jun
4-5 wk
2 Jul
6 Jul
6 wk after
8 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
9 – 16 Jun
3-4 wk
7 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Feb – 25 Mar
1 Apr
8-12 wk
20 May
27 May
0 wk
10 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
16 Jun
1 wk after
24 May
6 Jun
1 wk after
Maize
Zea mays
Fleece
7 – 14 May
3-4 wk
4 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Apr – 7 May
5 Jul
3-4 wk
28 May
26 Jul
1 wk after
10 Jun
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
6 Jul
0 wk
20 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
11 Jun
5-7 wk
20 May
16 Jul
0 wk
20 May
6 Jul
0 wk
Potato
Solanum tuberosum
24 Apr – 8 May
8 Jun
4-6 wk
5 Jun
6 Jul
2 wk after
5 Jun
26 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
21 Jun
5-7 wk
20 May
26 Jul
0 wk
24 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
19 – 26 May
11 Jun
3-4 wk
16 Jun
2 Jul
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Apr – 7 May
28 Jun
3-4 wk
28 May
19 Jul
1 wk after
10 Jun
9 Jul
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
10 Jul
3-4 wk
20 May
31 Jul
0 wk
24 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
2 Jun
2-4 wk
20 May
16 Jun
0 wk
20 May
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
16 Jun
1 wk after
24 May
6 Jun
1 wk after
Spinach
Spinacia oleracea
22 – 29 Apr
25 Jul
3-4 wk
20 May
15 Aug
0 wk
16 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
21 Jun – 5 Jul
4-6 wk
2 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
9 – 23 Apr
6-8 wk
4 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
7 – 21 May
13 Jun
2-4 wk
4 Jun
27 Jun
2 wk after
24 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
25 Jun
3-4 wk
20 May
16 Jul
0 wk
24 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
5 – 19 May
20 May
4-6 wk
16 Jun
17 Jun
4 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
21 May
8-10 wk
20 May
16 Jul
0 wk
24 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
24 May
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
4 Jun
6-8 wk
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
Spearmint
Mentha spicata
25 Feb – 25 Mar
21 May
8-12 wk
20 May
16 Jul
0 wk
24 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
20 May
15 Aug
0 wk
10 Jun
5 Aug
3 wk after
Garden sage
Salvia officinalis
19 Mar – 2 Apr
6 May
8-10 wk
28 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
11 – 25 Mar
11 May
8-10 wk
20 May
6 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
24 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
24 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
19 Feb – 19 Mar
7 Apr
10-14 wk
28 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
19 – 26 May
27 May
3-4 wk
16 Jun
17 Jun
4 wk after
Cornflower
Centaurea cyanus
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
Statice
Limonium sinuatum
7 – 21 Apr
16 Apr
8-10 wk
16 Jun
4 wk after
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
5 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
21 Apr – 5 May
30 Apr
6-8 wk
16 Jun
4 wk after
2 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
13 – 27 Apr
8 May
6-8 wk
8 Jun
19 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
29 Apr – 27 May
22 May
4-8 wk
24 Jun
5 wk after
24 Jun
5 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
10 Jun
3 wk after
Busy lizzie
Impatiens walleriana
9 Apr – 7 May
7 Jun
8-12 wk
2 Jul
2 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
21 Apr – 5 May
10 May
6-8 wk
16 Jun
21 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
5 – 19 May
4-6 wk
16 Jun
4 wk after
Chinese lantern
Physalis alkekengi
19 Mar – 2 Apr
21 Apr
8-10 wk
28 May
16 Jun
1 wk after
Love in a mist
Nigella damascena
20 May
1 Jul
0 wk
24 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
21 Apr – 5 May
6-8 wk
16 Jun
4 wk after
2 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
5 Mar – 2 Apr
21 Apr
8-12 wk
28 May
16 Jun
1 wk after
Cardoon
Cynara cardunculus
24 Mar – 21 Apr
8-12 wk
16 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
24 Mar – 21 Apr
12 Apr
8-12 wk
16 Jun
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
21 Apr – 5 May
26 Apr
6-8 wk
16 Jun
4 wk after
Corn poppy
Papaver rhoeas
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
11 May
8-12 wk
20 May
6 Jul
0 wk
5 Jun
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
23 Apr – 7 May
26 Apr
8-10 wk
2 Jul
6 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
1 Jun
5-8 wk
20 May
6 Jul
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
4 Jun
6-8 wk
20 May
16 Jul
0 wk
10 Jun
6 Jul
3 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
10 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
5 – 19 May
5 May
4-6 wk
16 Jun
4 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
21 May
8-10 wk
20 May
16 Jul
0 wk
5 Jun
6 Jul
2 wk after
Petunia
Petunia
24 Mar – 21 Apr
16 Apr
8-12 wk
16 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
2 – 16 Apr
5 May
6-8 wk
28 May
16 Jun
1 wk after
8 Jul
7 wk after
Common zinnia
Zinnia elegans
5 – 19 May
20 May
4-6 wk
16 Jun
17 Jun
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
12 – 26 May
27 May
3-5 wk
16 Jun
17 Jun
4 wk after
Garden cosmos
Cosmos bipinnatus
5 – 19 May
22 May
4-6 wk
16 Jun
19 Jun
4 wk after
8 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
9 Apr – 7 May
12 May
8-12 wk
2 Jul
7 Jul
6 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
21 Apr
8-12 wk
20 May
16 Jun
0 wk
24 Jun
5 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
5 Apr
6-8 wk
20 May
0 wk
10 Jun
3 wk after
Safflower
Carthamus tinctorius
20 May
16 Jun
0 wk
24 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
2 May
26 Jun
3 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
8 Jun
4-6 wk
20 May
6 Jul
0 wk
10 Jun
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
24 Mar – 7 Apr
10-12 wk
16 Jun
4 wk after
Sunflower
Helianthus annuus
19 – 26 May
15 Jun
3-4 wk
16 Jun
6 Jul
4 wk after
24 Jun
26 Jun
5 wk after
China aster
Callistephus chinensis
21 Apr – 5 May
4 Jun
6-8 wk
16 Jun
16 Jul
4 wk after
8 Jul
7 wk after
Annual phlox
Phlox drummondii
9 – 23 Apr
10 May
6-8 wk
4 Jun
21 Jun
2 wk after
8 Jul
7 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
10 Jun
3 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
21 Apr
8-12 wk
20 May
16 Jun
0 wk
24 Jun
5 wk after
African marigold
Tagetes erecta
21 Apr – 5 May
10 May
6-8 wk
16 Jun
21 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
2 – 16 Apr
25 May
6-8 wk
28 May
6 Jul
1 wk after
8 Jul
7 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
11 Apr
8-10 wk
20 May
6 Jun
0 wk
24 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
7 Apr – 5 May
6 May
6-10 wk
16 Jun
17 Jun
4 wk after
California goldenpoppy
Eschscholzia californica
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
7 – 21 Apr
11 May
8-10 wk
16 Jun
6 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
10 Jun
3 wk after