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Rel. frost
Last spring frost (0°C) 21 Apr Frost 1 of 10 years · 20 years of data
Frost-free season 222 days 21 Apr – 29 Nov
Probability that frost is over

90% = Half of years are frost-free by this date. More about frost & season →

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Vegetables

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
2 – 16 Apr
5-7 wk
21 May
5 wk after
17 Apr
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
27 Mar – 10 Apr
4-6 wk
8 May
3 wk after
17 Apr
1 wk before
Chili pepper
Capsicum annuum
Fleece
24 Mar – 21 Apr
8-12 wk
16 Jun
8 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Feb
5-7 wk
28 Mar
4 wk before
13 Apr
2 wk before
Cucumber
Cucumis sativus
19 – 26 May
3-4 wk
16 Jun
10 wk after
Florence Fennel
Foeniculum vulgare
Fleece
12 – 19 May
4-5 wk
16 Jun
8 wk after
17 May
4 wk after
Butter bean
Phaseolus lunatus
Season too short
4 – 11 May
3-4 wk
1 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Jan – 24 Feb
8-12 wk
21 Apr
Vid frost
4 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
8 Apr
2 wk before
Sweetcorn
Zea mays
Season too short
26 Apr – 3 May
3-4 wk
24 May
5 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
23 – 30 Apr
3-4 wk
21 May
5 wk after
4 May
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
13 Apr
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Feb
5-7 wk
28 Mar
4 wk before
13 Apr
2 wk before
Potato
Solanum tuberosum
Season too short
18 Feb – 4 Mar
4-6 wk
1 Apr
3 wk before
1 Apr
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Feb
5-7 wk
28 Mar
4 wk before
17 Apr
1 wk before
Pumpkin
Cucurbita pepo
19 – 26 May
3-4 wk
16 Jun
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
23 – 30 Apr
3-4 wk
21 May
5 wk after
4 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
27 Mar – 10 Apr
4-6 wk
8 May
3 wk after
Lettuce
Lactuca sativa
17 – 24 Mar
3-4 wk
14 Apr
1 wk before
17 Apr
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Mar
4-6 wk
14 Apr
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
6 – 20 Feb
2-4 wk
6 Mar
7 wk before
6 Mar
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
18 Mar
5 wk before
Spinach
Spinacia oleracea
9 – 16 Mar
3-4 wk
6 Apr
3 wk before
8 Apr
3 wk before
Sweet potato
Ipomoea batatas
9 – 23 May
4-6 wk
20 Jun
11 wk after
Tomato
Solanum lycopersicum
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
11 – 25 May
2-4 wk
8 Jun
8 wk after
1 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
27 Mar – 10 Apr
4-6 wk
8 May
3 wk after
Pea
Pisum sativum
9 – 16 Mar
3-4 wk
6 Apr
3 wk before
17 Apr
1 wk before
Current date Soon Date passed

Herbs

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Basil
Ocimum basilicum
Season too short
12 – 26 Apr
4-6 wk
24 May
5 wk after
Lemon balm
Melissa officinalis
10 – 24 Feb
8-10 wk
21 Apr
Vid frost
16 May
4 wk after
Dill
Anethum graveolens
17 Apr
1 wk before
Chives
Allium schoenoprasum
31 Jan – 14 Feb
6-8 wk
28 Mar
4 wk before
17 Apr
1 wk before
Spearmint
Mentha spicata
12 Jan – 9 Feb
8-12 wk
6 Apr
3 wk before
16 May
4 wk after
Coriander
Coriandrum sativum
4 May
2 wk after
Sage
Salvia officinalis
12 – 26 Mar
8-10 wk
21 May
5 wk after
Thyme
Thymus vulgaris
27 Feb – 13 Mar
8-10 wk
8 May
3 wk after
Oregano
Origanum vulgare
2 – 16 Mar
6-8 wk
27 Apr
1 wk after
16 May
4 wk after
Parsley
Petroselinum crispum
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
17 Apr
1 wk before
Rosemary
Salvia rosmarinus
12 Feb – 12 Mar
10-14 wk
21 May
5 wk after
Current date Soon Date passed

Annual flowers

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Morning glory
Ipomoea tricolor
Greenhouse
19 – 26 May
3-4 wk
16 Jun
8 wk after
Cornflower
Centaurea cyanus
6 Apr
3 wk before
17 Apr
1 wk before
Statice
Limonium sinuatum
30 Mar – 13 Apr
8-10 wk
8 Jun
8 wk after
Sweet William
Dianthus barbatus
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
29 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
1 Jul
11 wk after
Dahlia
Dahlia × pinnata
8 – 22 Apr
6-8 wk
3 Jun
7 wk after
Dahlia (tubers)
Dahlia × pinnata
Season too short
23 Feb – 23 Mar
4-8 wk
20 Apr
20 Apr
Foxglove
Digitalis purpurea
26 Jan – 9 Feb
8-10 wk
6 Apr
3 wk before
4 May
2 wk after
Busy lizzie
Impatiens walleriana
24 Mar – 21 Apr
8-12 wk
16 Jun
10 wk after
Creeping zinnia
Sanvitalia procumbens
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
Hyacinth bean
Dolichos lablab
Season too short
5 – 19 May
4-6 wk
16 Jun
8 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Mar
8-10 wk
21 May
5 wk after
Love in a mist
Nigella damascena
17 Apr
1 wk before
Strawflower
Xerochrysum bracteatum
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
1 Jul
11 wk after
Tall verbena
Verbena bonariensis
26 Feb – 26 Mar
8-12 wk
21 May
5 wk after
Cardoon
Cynara cardunculus
Greenhouse
22 Feb – 22 Mar
8-12 wk
17 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
24 Mar – 21 Apr
8-12 wk
16 Jun
8 wk after
Globe amaranth
Gomphrena globosa
Fleece
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
Corn poppy
Papaver rhoeas
17 Apr
1 wk before
Snapdragon
Antirrhinum majus
20 Jan – 17 Feb
8-12 wk
14 Apr
1 wk before
29 Apr
1 wk after
Flossflower
Ageratum houstonianum
Fleece
7 – 21 Apr
8-10 wk
16 Jun
8 wk after
Sweet pea
Lathyrus odoratus
9 Feb – 2 Mar
5-8 wk
6 Apr
3 wk before
Stock
Matthiola incana
17 Feb – 3 Mar
6-8 wk
14 Apr
1 wk before
4 May
2 wk after
Wormwood
Artemisia absinthium
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
4 May
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
5 – 19 May
4-6 wk
16 Jun
8 wk after
Pansy
Viola × wittrockiana
17 – 31 Jan
8-10 wk
28 Mar
4 wk before
29 Apr
1 wk after
Petunia
Petunia
16 Mar – 13 Apr
8-12 wk
8 Jun
8 wk after
Scabious
Scabiosa atropurpurea
26 Mar – 9 Apr
6-8 wk
21 May
5 wk after
1 Jun
6 wk after
Zinnia
Zinnia elegans
27 Apr – 11 May
4-6 wk
8 Jun
8 wk after
Common morning glory
Ipomoea purpurea
Fleece
12 – 26 May
3-5 wk
16 Jun
8 wk after
Cosmos
Cosmos bipinnatus
27 Apr – 11 May
4-6 wk
8 Jun
8 wk after
1 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
4 Apr – 2 May
8-12 wk
27 Jun
10 wk after
Bee balm
Monarda didyma
27 Jan – 24 Feb
8-12 wk
21 Apr
Vid frost
16 May
4 wk after
Yarrow
Achillea millefolium
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
4 May
2 wk after
Safflower
Carthamus tinctorius
6 Apr
3 wk before
17 Apr
1 wk before
Iceland poppy
Papaver nudicaule
31 Jan – 14 Feb
6-8 wk
28 Mar
4 wk before
13 Apr
2 wk before
Bishop's flower
Ammi majus
21 Mar – 4 Apr
4-6 wk
2 May
2 wk after
4 May
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
24 Mar – 7 Apr
10-12 wk
16 Jun
8 wk after
Sunflower
Helianthus annuus
11 – 18 May
3-4 wk
8 Jun
8 wk after
16 May
4 wk after
China aster
Callistephus chinensis
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
1 Jun
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
6-8 wk
27 May
6 wk after
1 Jun
6 wk after
Hollyhock
Alcea rosea
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
4 May
2 wk after
Delphinium
Delphinium elatum
13 Feb – 13 Mar
8-12 wk
8 May
3 wk after
16 May
4 wk after
African marigold
Tagetes erecta
13 – 27 Apr
6-8 wk
8 Jun
8 wk after
Black-eyed Susan
Rudbeckia hirta
26 Mar – 9 Apr
6-8 wk
21 May
5 wk after
1 Jun
6 wk after
Woodland sage
Salvia nemorosa
16 Feb – 2 Mar
8-10 wk
27 Apr
1 wk after
16 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
7 Apr – 5 May
6-10 wk
16 Jun
8 wk after
California goldenpoppy
Eschscholzia californica
17 Apr
1 wk before
Painted tongue
Salpiglossis sinuata
30 Mar – 13 Apr
8-10 wk
8 Jun
8 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Feb
6-8 wk
6 Apr
3 wk before
4 May
2 wk after
Current date Soon Date passed