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Method
Rel. frost
Last spring frost (0°C) 25 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 205 days 25 Mar – 16 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)
4 – 18 Feb
22 Jun
5-7 wk
25 Mar
27 Jul
0 wk
19 Mar
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Feb
4 Jul
4-6 wk
25 Mar
1 Aug
0 wk
19 Mar
22 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
18 Jan – 15 Feb
2 Apr
8-12 wk
12 Apr
28 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Feb
17 Jun
5-7 wk
25 Mar
22 Jul
0 wk
12 Mar
12 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
24 – 31 Mar
27 May
3-4 wk
21 Apr
17 Jun
4 wk after
Florence Fennel
Foeniculum vulgare
31 Mar – 7 Apr
14 Jun
4-5 wk
5 May
12 Jul
6 wk after
5 May
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
17 – 24 Apr
12 May
3-4 wk
15 May
2 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
31 Dec – 28 Jan
7 Apr
8-12 wk
25 Mar
2 Jun
0 wk
7 Apr
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 Mar
22 Jun
1 wk before
19 Mar
12 Jun
1 wk before
Maize
Zea mays
Fleece
15 – 22 Mar
17 May
3-4 wk
12 Apr
7 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Feb – 4 Mar
11 Jul
3-4 wk
25 Mar
1 Aug
0 wk
7 Apr
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 Mar
12 Jul
0 wk
12 Mar
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Feb
17 Jun
5-7 wk
25 Mar
22 Jul
0 wk
12 Mar
12 Jul
2 wk before
Potato
Solanum tuberosum
16 Feb – 2 Mar
8 Jun
4-6 wk
30 Mar
6 Jul
1 wk after
30 Mar
26 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Feb
27 Jun
5-7 wk
25 Mar
1 Aug
0 wk
19 Mar
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
7 – 14 Apr
1 Jun
3-4 wk
5 May
22 Jun
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Feb – 4 Mar
21 Jun
3-4 wk
25 Mar
12 Jul
0 wk
7 Apr
2 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Lettuce
Lactuca sativa
25 Feb – 4 Mar
16 Jul
3-4 wk
25 Mar
6 Aug
0 wk
19 Mar
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Feb
8 Jun
2-4 wk
12 Mar
22 Jun
2 wk before
12 Mar
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 Mar
22 Jun
1 wk before
19 Mar
12 Jun
1 wk before
Spinach
Spinacia oleracea
25 Feb – 4 Mar
31 Jul
3-4 wk
25 Mar
21 Aug
0 wk
5 Mar
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
26 Apr – 10 May
4-6 wk
7 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
15 Feb – 1 Mar
26 Apr
6-8 wk
12 Apr
7 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
24 Mar – 7 Apr
3 Jun
2-4 wk
21 Apr
17 Jun
4 wk after
5 May
7 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Garden pea
Pisum sativum
25 Feb – 4 Mar
1 Jul
3-4 wk
25 Mar
22 Jul
0 wk
19 Mar
12 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
24 Mar – 7 Apr
10 May
4-6 wk
5 May
7 Jun
6 wk after
Lemon balm
Melissa officinalis
14 – 28 Jan
27 May
8-10 wk
25 Mar
22 Jul
0 wk
20 Apr
12 Jul
4 wk after
Dill
Anethum graveolens
19 Mar
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
Season too short
28 Jan – 11 Feb
8 Jun
6-8 wk
25 Mar
20 Jul
0 wk
19 Feb
10 Jul
5 wk before
Spearmint
Mentha spicata
31 Dec – 28 Jan
27 May
8-12 wk
25 Mar
22 Jul
0 wk
20 Apr
12 Jul
4 wk after
Coriander
Coriandrum sativum
25 Mar
21 Aug
0 wk
7 Apr
11 Aug
2 wk after
Garden sage
Salvia officinalis
14 – 28 Jan
12 May
8-10 wk
25 Mar
7 Jul
0 wk
Common thyme
Thymus vulgaris
14 – 28 Jan
17 May
8-10 wk
25 Mar
12 Jul
0 wk
Oregano
Origanum vulgare
28 Jan – 11 Feb
31 May
6-8 wk
25 Mar
12 Jul
0 wk
20 Apr
2 Jul
4 wk after
Parsley
Petroselinum crispum
28 Jan – 11 Feb
31 May
6-8 wk
25 Mar
12 Jul
0 wk
19 Mar
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
17 Dec – 14 Jan
13 Apr
10-14 wk
25 Mar
22 Jun
0 wk

Annual flowers

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