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Rel. frost
Last spring frost (0°C) 21 May Frost 1 of 10 years · 20 years of data
Frost-free season 152 days 21 May – 20 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)
4 – 18 May
21 Jun
5-7 wk
22 Jun
26 Jul
5 wk after
15 May
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
29 Apr – 13 May
3 Jul
4-6 wk
10 Jun
31 Jul
3 wk after
15 May
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
8 Apr – 6 May
8-12 wk
1 Jul
6 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Mar
16 Jun
5-7 wk
21 Apr
21 Jul
4 wk before
8 May
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
3 – 10 Jun
7 Jun
3-4 wk
1 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
22 – 29 Jun
4-5 wk
27 Jul
10 wk after
1 Jul
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jul
3-4 wk
31 Jul
10 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Feb – 26 Mar
6 Apr
8-12 wk
21 May
1 Jun
Vid frost
3 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
15 May
21 Jun
1 wk before
15 May
11 Jun
1 wk before
Maize
Zea mays
Greenhouse
19 – 26 May
28 May
3-4 wk
16 Jun
18 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 May – 1 Jun
10 Jul
3-4 wk
22 Jun
31 Jul
5 wk after
3 Jun
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 May
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Mar
16 Jun
5-7 wk
21 Apr
21 Jul
4 wk before
8 May
11 Jul
2 wk before
Potato
Solanum tuberosum
14 – 28 Apr
13 Jun
4-6 wk
26 May
11 Jul
1 wk after
26 May
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Mar
26 Jun
5-7 wk
21 Apr
31 Jul
4 wk before
15 May
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
18 – 25 Jun
3-4 wk
16 Jul
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 May – 1 Jun
2 Jul
3-4 wk
22 Jun
23 Jul
5 wk after
3 Jun
13 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Apr – 13 May
28 Jun
4-6 wk
10 Jun
26 Jul
3 wk after
Lettuce
Lactuca sativa
14 – 21 Apr
15 Jul
3-4 wk
12 May
5 Aug
1 wk before
15 May
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
31 Mar – 14 Apr
28 Jun
4-6 wk
12 May
26 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
10 – 24 Apr
7 Jun
2-4 wk
8 May
21 Jun
2 wk before
8 May
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
15 May
21 Jun
1 wk before
15 May
11 Jun
1 wk before
Spinach
Spinacia oleracea
3 – 10 Apr
30 Jul
3-4 wk
1 May
20 Aug
3 wk before
1 May
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
22 Jun – 6 Jul
4-6 wk
3 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
21 Apr – 5 May
7 May
6-8 wk
16 Jun
18 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
3 – 17 Jun
14 Jun
2-4 wk
1 Jul
6 wk after
16 Jun
18 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Apr – 13 May
28 Jun
4-6 wk
10 Jun
26 Jul
3 wk after
Garden pea
Pisum sativum
3 – 10 Apr
30 Jun
3-4 wk
1 May
21 Jul
3 wk before
15 May
11 Jul
1 wk before

Herbs

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