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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 221 days 21 Apr – 28 Nov
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
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
4 – 18 Apr
5-7 wk
23 May
5 wk after
15 Apr
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
30 Mar – 13 Apr
4-6 wk
11 May
3 wk after
15 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)
1 – 15 Feb
5-7 wk
22 Mar
4 wk before
8 Apr
2 wk before
Cucumber
Cucumis sativus
30 May – 6 Jun
3-4 wk
27 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
Greenhouse
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)
4 May
2 wk after
4 May
2 wk after
Sweetcorn
Zea mays
Fleece
9 – 16 May
3-4 wk
6 Jun
7 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
3-4 wk
23 May
5 wk after
4 May
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 Apr
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Feb
5-7 wk
22 Mar
4 wk before
8 Apr
2 wk before
Potato
Solanum tuberosum
15 – 29 Mar
4-6 wk
26 Apr
1 wk after
26 Apr
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Feb
5-7 wk
22 Mar
4 wk before
15 Apr
1 wk before
Pumpkin
Cucurbita pepo
30 May – 6 Jun
3-4 wk
27 Jun
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
3-4 wk
23 May
5 wk after
4 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
30 Mar – 13 Apr
4-6 wk
11 May
3 wk after
Lettuce
Lactuca sativa
15 – 22 Mar
3-4 wk
12 Apr
1 wk before
15 Apr
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Mar
4-6 wk
12 Apr
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Mar
2-4 wk
8 Apr
2 wk before
8 Apr
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
15 Apr
1 wk before
15 Apr
1 wk before
Spinach
Spinacia oleracea
4 – 11 Mar
3-4 wk
1 Apr
3 wk before
1 Apr
3 wk before
Sweet potato
Ipomoea batatas
23 May – 6 Jun
4-6 wk
4 Jul
11 wk after
Tomato
Solanum lycopersicum
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
19 May – 2 Jun
2-4 wk
16 Jun
8 wk after
1 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
30 Mar – 13 Apr
4-6 wk
11 May
3 wk after
Pea
Pisum sativum
4 – 11 Mar
3-4 wk
1 Apr
3 wk before
15 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
Fleece
25 Apr – 9 May
4-6 wk
6 Jun
7 wk after
Lemon balm
Melissa officinalis
10 – 24 Feb
8-10 wk
21 Apr
Vid frost
17 May
4 wk after
Dill
Anethum graveolens
15 Apr
1 wk before
Chives
Allium schoenoprasum
25 Jan – 8 Feb
6-8 wk
22 Mar
4 wk before
15 Apr
1 wk before
Spearmint
Mentha spicata
7 Jan – 4 Feb
8-12 wk
1 Apr
3 wk before
17 May
4 wk after
Coriander
Coriandrum sativum
4 May
2 wk after
Sage
Salvia officinalis
14 – 28 Mar
8-10 wk
23 May
5 wk after
Thyme
Thymus vulgaris
2 – 16 Mar
8-10 wk
11 May
3 wk after
Oregano
Origanum vulgare
5 – 19 Mar
6-8 wk
30 Apr
1 wk after
17 May
4 wk after
Parsley
Petroselinum crispum
4 – 18 Feb
6-8 wk
1 Apr
3 wk before
15 Apr
1 wk before
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
10-14 wk
23 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
1 Apr
3 wk before
15 Apr
1 wk before
Statice
Limonium sinuatum
7 – 21 Apr
8-10 wk
16 Jun
8 wk after
Sweet William
Dianthus barbatus
4 – 18 Feb
6-8 wk
1 Apr
3 wk before
26 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
4 Jul
11 wk after
Dahlia
Dahlia × pinnata
14 – 28 Apr
6-8 wk
9 Jun
7 wk after
Dahlia (tubers)
Dahlia × pinnata
22 Mar – 19 Apr
4-8 wk
17 May
4 wk after
17 May
4 wk after
Foxglove
Digitalis purpurea
21 Jan – 4 Feb
8-10 wk
1 Apr
3 wk before
4 May
2 wk after
Busy lizzie
Impatiens walleriana
4 Apr – 2 May
8-12 wk
27 Jun
10 wk after
Creeping zinnia
Sanvitalia procumbens
21 Apr – 5 May
6-8 wk
16 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
14 – 28 Mar
8-10 wk
23 May
5 wk after
Love in a mist
Nigella damascena
15 Apr
1 wk before
Strawflower
Xerochrysum bracteatum
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
4 Jul
11 wk after
Tall verbena
Verbena bonariensis
28 Feb – 28 Mar
8-12 wk
23 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
15 Apr
1 wk before
Snapdragon
Antirrhinum majus
18 Jan – 15 Feb
8-12 wk
12 Apr
1 wk before
26 Apr
1 wk after
Flossflower
Ageratum houstonianum
Fleece
7 – 21 Apr
8-10 wk
16 Jun
8 wk after
Sweet pea
Lathyrus odoratus
4 – 25 Feb
5-8 wk
1 Apr
3 wk before
Stock
Matthiola incana
15 Feb – 1 Mar
6-8 wk
12 Apr
1 wk before
4 May
2 wk after
Wormwood
Artemisia absinthium
4 – 18 Feb
6-8 wk
1 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
11 – 25 Jan
8-10 wk
22 Mar
4 wk before
26 Apr
1 wk after
Petunia
Petunia
24 Mar – 21 Apr
8-12 wk
16 Jun
8 wk after
Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
6-8 wk
23 May
5 wk after
1 Jun
6 wk after
Zinnia
Zinnia elegans
5 – 19 May
4-6 wk
16 Jun
8 wk after
Common morning glory
Ipomoea purpurea
Fleece
12 – 26 May
3-5 wk
16 Jun
8 wk after
Cosmos
Cosmos bipinnatus
5 – 19 May
4-6 wk
16 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
17 May
4 wk after
Yarrow
Achillea millefolium
4 – 18 Feb
6-8 wk
1 Apr
3 wk before
4 May
2 wk after
Safflower
Carthamus tinctorius
1 Apr
3 wk before
15 Apr
1 wk before
Iceland poppy
Papaver nudicaule
25 Jan – 8 Feb
6-8 wk
22 Mar
4 wk before
8 Apr
2 wk before
Bishop's flower
Ammi majus
25 Mar – 8 Apr
4-6 wk
6 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
19 – 26 May
3-4 wk
16 Jun
8 wk after
17 May
4 wk after
China aster
Callistephus chinensis
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
1 Jun
6 wk after
Annual phlox
Phlox drummondii
6 – 20 Apr
6-8 wk
1 Jun
6 wk after
1 Jun
6 wk after
Hollyhock
Alcea rosea
4 – 18 Feb
6-8 wk
1 Apr
3 wk before
4 May
2 wk after
Delphinium
Delphinium elatum
16 Feb – 16 Mar
8-12 wk
11 May
3 wk after
17 May
4 wk after
African marigold
Tagetes erecta
21 Apr – 5 May
6-8 wk
16 Jun
8 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
6-8 wk
23 May
5 wk after
1 Jun
6 wk after
Woodland sage
Salvia nemorosa
19 Feb – 5 Mar
8-10 wk
30 Apr
1 wk after
17 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
15 Apr
1 wk before
Painted tongue
Salpiglossis sinuata
7 – 21 Apr
8-10 wk
16 Jun
8 wk after
Water forget-me-not
Myosotis scorpioides
4 – 18 Feb
6-8 wk
1 Apr
3 wk before
4 May
2 wk after
Current date Soon Date passed