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Rel. frost
Last spring frost (0°C) 1 May Frost 9 of 10 years · 20 years of data
Frost-free season 164 days 1 May – 12 Oct
Probability that frost is over

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