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Rel. frost
Last spring frost (0°C) 28 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 205 days 28 Mar – 19 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)
7 – 21 Feb
17 Jun
5-7 wk
28 Mar
22 Jul
0 wk
21 Mar
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
14 – 28 Feb
29 Jun
4-6 wk
28 Mar
27 Jul
0 wk
21 Mar
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
14 Jan – 11 Feb
31 Jan
8-12 wk
8 Apr
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Feb
12 Jun
5-7 wk
28 Mar
17 Jul
0 wk
16 Mar
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
11 – 18 Mar
26 May
3-4 wk
8 Apr
16 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
29 Mar – 5 Apr
9 Jun
4-5 wk
3 May
7 Jul
5 wk after
3 May
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
12 – 19 Apr
26 Apr
3-4 wk
10 May
17 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
3 – 31 Jan
29 Mar
8-12 wk
28 Mar
24 May
0 wk
7 Apr
14 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
21 Mar
13 Jun
1 wk before
21 Mar
3 Jun
1 wk before
Maize
Zea mays
Greenhouse
28 Feb – 7 Mar
16 May
3-4 wk
28 Mar
6 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 Mar
6 Jul
3-4 wk
3 Apr
27 Jul
1 wk after
7 Apr
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 Mar
7 Jul
0 wk
16 Mar
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Feb
12 Jun
5-7 wk
28 Mar
17 Jul
0 wk
16 Mar
7 Jul
2 wk before
Potato
Solanum tuberosum
19 Feb – 5 Mar
24 May
4-6 wk
2 Apr
21 Jun
1 wk after
2 Apr
11 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Feb
22 Jun
5-7 wk
28 Mar
27 Jul
0 wk
21 Mar
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
19 – 26 Mar
31 May
3-4 wk
16 Apr
21 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 Mar
30 May
3-4 wk
3 Apr
20 Jun
1 wk after
7 Apr
10 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
14 – 28 Feb
24 Jun
4-6 wk
28 Mar
22 Jul
0 wk
Lettuce
Lactuca sativa
28 Feb – 7 Mar
11 Jul
3-4 wk
28 Mar
1 Aug
0 wk
21 Mar
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
14 – 28 Feb
24 Jun
4-6 wk
28 Mar
22 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 Feb – 2 Mar
3 Jun
2-4 wk
16 Mar
17 Jun
2 wk before
16 Mar
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
21 Mar
13 Jun
1 wk before
21 Mar
3 Jun
1 wk before
Spinach
Spinacia oleracea
28 Feb – 7 Mar
26 Jul
3-4 wk
28 Mar
16 Aug
0 wk
10 Mar
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
24 Apr – 8 May
4-6 wk
5 Jun
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
31 Jan – 14 Feb
25 Apr
6-8 wk
28 Mar
6 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
11 – 25 Mar
2 Jun
2-4 wk
8 Apr
16 Jun
2 wk after
18 Apr
6 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
14 – 28 Feb
24 Jun
4-6 wk
28 Mar
22 Jul
0 wk
Garden pea
Pisum sativum
28 Feb – 7 Mar
26 Jun
3-4 wk
28 Mar
17 Jul
0 wk
21 Mar
7 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
5 – 19 Mar
9 May
4-6 wk
16 Apr
6 Jun
3 wk after
Lemon balm
Melissa officinalis
17 – 31 Jan
22 May
8-10 wk
28 Mar
17 Jul
0 wk
18 Apr
7 Jul
3 wk after
Dill
Anethum graveolens
21 Mar
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
31 Jan – 14 Feb
5 Jun
6-8 wk
28 Mar
17 Jul
0 wk
27 Feb
7 Jul
4 wk before
Spearmint
Mentha spicata
3 – 31 Jan
22 May
8-12 wk
28 Mar
17 Jul
0 wk
18 Apr
7 Jul
3 wk after
Coriander
Coriandrum sativum
28 Mar
16 Aug
0 wk
7 Apr
6 Aug
1 wk after
Garden sage
Salvia officinalis
23 Jan – 6 Feb
7 May
8-10 wk
3 Apr
2 Jul
1 wk after
Common thyme
Thymus vulgaris
17 – 31 Jan
12 May
8-10 wk
28 Mar
7 Jul
0 wk
Oregano
Origanum vulgare
31 Jan – 14 Feb
26 May
6-8 wk
28 Mar
7 Jul
0 wk
18 Apr
27 Jun
3 wk after
Parsley
Petroselinum crispum
31 Jan – 14 Feb
26 May
6-8 wk
28 Mar
7 Jul
0 wk
21 Mar
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
26 Dec – 23 Jan
8 Apr
10-14 wk
3 Apr
17 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 Mar
16 May
3-4 wk
16 Apr
6 Jun
3 wk after
Cornflower
Centaurea cyanus
28 Mar
17 Jul
0 wk
21 Mar
7 Jul
1 wk before
Statice
Limonium sinuatum
5 – 19 Feb
18 Apr
8-10 wk
16 Apr
13 Jun
3 wk after
Sweet William
Dianthus barbatus
31 Jan – 14 Feb
6-8 wk
28 Mar
0 wk
2 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
19 Feb – 5 Mar
2 May
6-8 wk
16 Apr
13 Jun
3 wk after
5 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
14 – 28 Feb
9 May
6-8 wk
11 Apr
20 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
21 Feb – 21 Mar
23 May
4-8 wk
18 Apr
20 Jun
3 wk after
18 Apr
10 Jun
3 wk after
Foxglove
Digitalis purpurea
17 – 31 Jan
8-10 wk
28 Mar
0 wk
7 Apr
1 wk after
Busy lizzie
Impatiens walleriana
8 Feb – 8 Mar
27 May
8-12 wk
3 May
22 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
19 Feb – 5 Mar
12 May
6-8 wk
16 Apr
23 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
5 – 19 Mar
9 Apr
4-6 wk
16 Apr
7 May
3 wk after
Chinese lantern
Physalis alkekengi
23 Jan – 6 Feb
22 Apr
8-10 wk
3 Apr
17 Jun
1 wk after
Love in a mist
Nigella damascena
28 Mar
2 Jul
0 wk
21 Mar
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
19 Feb – 5 Mar
22 Apr
6-8 wk
16 Apr
3 Jun
3 wk after
5 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
9 Jan – 6 Feb
22 Apr
8-12 wk
3 Apr
17 Jun
1 wk after
Cardoon
Cynara cardunculus
22 Jan – 19 Feb
23 Mar
8-12 wk
16 Apr
18 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
22 Jan – 19 Feb
1 Apr
8-12 wk
16 Apr
27 May
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
19 Feb – 5 Mar
15 Apr
6-8 wk
16 Apr
27 May
3 wk after
Corn poppy
Papaver rhoeas
28 Mar
17 Jul
0 wk
21 Mar
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
3 – 31 Jan
12 May
8-12 wk
28 Mar
7 Jul
0 wk
2 Apr
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
22 Feb – 8 Mar
28 Apr
8-10 wk
3 May
23 Jun
5 wk after
Sweet pea
Lathyrus odoratus
31 Jan – 21 Feb
2 Jun
5-8 wk
28 Mar
7 Jul
0 wk
Stock
Matthiola incana
31 Jan – 14 Feb
5 Jun
6-8 wk
28 Mar
17 Jul
0 wk
7 Apr
7 Jul
1 wk after
Wormwood
Artemisia absinthium
31 Jan – 14 Feb
6 May
6-8 wk
28 Mar
17 Jun
0 wk
7 Apr
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
5 – 19 Mar
24 Apr
4-6 wk
16 Apr
22 May
3 wk after
Garden pansy
Viola × wittrockiana
17 – 31 Jan
22 May
8-10 wk
28 Mar
17 Jul
0 wk
2 Apr
7 Jul
1 wk after
Petunia
Petunia
22 Jan – 19 Feb
18 Apr
8-12 wk
16 Apr
13 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
6 – 20 Feb
6 May
6-8 wk
3 Apr
17 Jun
1 wk after
3 May
7 Jun
5 wk after
Common zinnia
Zinnia elegans
5 – 19 Mar
9 May
4-6 wk
16 Apr
6 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
12 – 26 Mar
16 May
3-5 wk
16 Apr
6 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
5 – 19 Mar
23 May
4-6 wk
16 Apr
20 Jun
3 wk after
3 May
10 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
8 Feb – 8 Mar
1 May
8-12 wk
3 May
26 Jun
5 wk after
Bee balm
Monarda didyma
3 – 31 Jan
22 Apr
8-12 wk
28 Mar
17 Jun
0 wk
18 Apr
7 Jun
3 wk after
Yarrow
Achillea millefolium
31 Jan – 14 Feb
6 Apr
6-8 wk
28 Mar
18 May
0 wk
7 Apr
8 May
1 wk after
Safflower
Carthamus tinctorius
28 Mar
17 Jun
0 wk
21 Mar
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
31 Jan – 14 Feb
26 May
6-8 wk
28 Mar
7 Jul
0 wk
17 Feb
27 Jun
6 wk before
Bishop's flower
Ammi majus
14 – 28 Feb
9 Jun
4-6 wk
28 Mar
7 Jul
0 wk
7 Apr
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
22 Jan – 5 Feb
22 Mar
10-12 wk
16 Apr
31 May
3 wk after
Sunflower
Helianthus annuus
19 – 26 Mar
16 Jun
3-4 wk
16 Apr
7 Jul
3 wk after
18 Apr
27 Jun
3 wk after
China aster
Callistephus chinensis
19 Feb – 5 Mar
5 Jun
6-8 wk
16 Apr
17 Jul
3 wk after
3 May
7 Jul
5 wk after
Annual phlox
Phlox drummondii
11 – 25 Feb
12 May
6-8 wk
8 Apr
23 Jun
2 wk after
3 May
13 Jun
5 wk after
Hollyhock
Alcea rosea
31 Jan – 14 Feb
6-8 wk
28 Mar
0 wk
7 Apr
1 wk after
Alpine delphinium
Delphinium elatum
3 – 31 Jan
22 Apr
8-12 wk
28 Mar
17 Jun
0 wk
18 Apr
7 Jun
3 wk after
African marigold
Tagetes erecta
19 Feb – 5 Mar
12 May
6-8 wk
16 Apr
23 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
6 – 20 Feb
26 May
6-8 wk
3 Apr
7 Jul
1 wk after
3 May
27 Jun
5 wk after
Wood sage
Salvia nemorosa
17 – 31 Jan
12 Apr
8-10 wk
28 Mar
7 Jun
0 wk
18 Apr
28 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
5 Feb – 5 Mar
25 Apr
6-10 wk
16 Apr
6 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
28 Mar
17 Jul
0 wk
21 Mar
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
5 – 19 Feb
12 May
8-10 wk
16 Apr
7 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
31 Jan – 14 Feb
6 May
6-8 wk
28 Mar
17 Jun
0 wk
16 Mar
7 Jun
2 wk before