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Method
Rel. frost
Last spring frost (0°C) 9 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 180 days 9 Apr – 6 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)
19 Feb – 5 Mar
20 Jun
5-7 wk
9 Apr
25 Jul
0 wk
3 Apr
15 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
26 Feb – 12 Mar
2 Jul
4-6 wk
9 Apr
30 Jul
0 wk
3 Apr
20 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
8 Feb – 8 Mar
10 Feb
8-12 wk
3 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
19 Feb – 5 Mar
15 Jun
5-7 wk
9 Apr
20 Jul
0 wk
27 Mar
10 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
5 – 12 Apr
22 May
3-4 wk
3 May
12 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
24 Apr – 1 May
5 Jun
4-5 wk
29 May
3 Jul
7 wk after
20 May
23 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
11 – 18 May
3-4 wk
8 Jun
9 wk after
Onion
Allium cepa (Cepa-gruppen)
15 Jan – 12 Feb
5 Apr
8-12 wk
9 Apr
31 May
0 wk
22 Apr
21 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
3 Apr
20 Jun
1 wk before
3 Apr
10 Jun
1 wk before
Maize
Zea mays
Greenhouse
12 – 19 Mar
12 May
3-4 wk
9 Apr
2 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Mar
9 Jul
3-4 wk
11 Apr
30 Jul
0 wk
22 Apr
20 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
9 Apr
10 Jul
0 wk
27 Mar
30 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
19 Feb – 5 Mar
15 Jun
5-7 wk
9 Apr
20 Jul
0 wk
27 Mar
10 Jul
2 wk before
Potato
Solanum tuberosum
3 – 17 Mar
4 Jun
4-6 wk
14 Apr
2 Jul
1 wk after
14 Apr
22 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Feb – 5 Mar
25 Jun
5-7 wk
9 Apr
30 Jul
0 wk
3 Apr
20 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
19 – 26 Apr
27 May
3-4 wk
17 May
17 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Mar
15 Jun
3-4 wk
11 Apr
6 Jul
0 wk
22 Apr
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
26 Feb – 12 Mar
27 Jun
4-6 wk
9 Apr
25 Jul
0 wk
Lettuce
Lactuca sativa
12 – 19 Mar
14 Jul
3-4 wk
9 Apr
4 Aug
0 wk
3 Apr
25 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
26 Feb – 12 Mar
27 Jun
4-6 wk
9 Apr
25 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
27 Feb – 13 Mar
6 Jun
2-4 wk
27 Mar
20 Jun
2 wk before
27 Mar
10 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
3 Apr
20 Jun
1 wk before
3 Apr
10 Jun
1 wk before
Spinach
Spinacia oleracea
12 – 19 Mar
29 Jul
3-4 wk
9 Apr
19 Aug
0 wk
20 Mar
9 Aug
3 wk before
Sweet potato
Ipomoea batatas
11 – 25 May
4-6 wk
22 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
12 – 26 Feb
21 Apr
6-8 wk
9 Apr
2 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
5 – 19 Apr
29 May
2-4 wk
3 May
12 Jun
3 wk after
5 May
2 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
26 Feb – 12 Mar
27 Jun
4-6 wk
9 Apr
25 Jul
0 wk
Garden pea
Pisum sativum
12 – 19 Mar
29 Jun
3-4 wk
9 Apr
20 Jul
0 wk
3 Apr
10 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 Apr
5 May
4-6 wk
17 May
2 Jun
5 wk after
Lemon balm
Melissa officinalis
29 Jan – 12 Feb
25 May
8-10 wk
9 Apr
20 Jul
0 wk
5 May
10 Jul
4 wk after
Dill
Anethum graveolens
3 Apr
30 Jul
1 wk before
Wild chives
Allium schoenoprasum
12 – 26 Feb
8 Jun
6-8 wk
9 Apr
20 Jul
0 wk
3 Apr
10 Jul
1 wk before
Spearmint
Mentha spicata
15 Jan – 12 Feb
25 May
8-12 wk
9 Apr
20 Jul
0 wk
5 May
10 Jul
4 wk after
Coriander
Coriandrum sativum
9 Apr
19 Aug
0 wk
22 Apr
9 Aug
2 wk after
Garden sage
Salvia officinalis
31 Jan – 14 Feb
10 May
8-10 wk
11 Apr
5 Jul
0 wk
Common thyme
Thymus vulgaris
29 Jan – 12 Feb
15 May
8-10 wk
9 Apr
10 Jul
0 wk
Oregano
Origanum vulgare
12 – 26 Feb
29 May
6-8 wk
9 Apr
10 Jul
0 wk
5 May
30 Jun
4 wk after
Parsley
Petroselinum crispum
12 – 26 Feb
29 May
6-8 wk
9 Apr
10 Jul
0 wk
3 Apr
30 Jun
1 wk before
Rosemary
Salvia rosmarinus
3 – 31 Jan
9 Apr
10-14 wk
11 Apr
18 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
Fleece
19 – 26 Apr
12 May
3-4 wk
17 May
2 Jun
5 wk after
Cornflower
Centaurea cyanus
9 Apr
20 Jul
0 wk
3 Apr
10 Jul
1 wk before
Statice
Limonium sinuatum
8 – 22 Mar
13 Apr
8-10 wk
17 May
8 Jun
5 wk after
Sweet William
Dianthus barbatus
12 – 26 Feb
6-8 wk
9 Apr
0 wk
14 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
22 Mar – 5 Apr
27 Apr
6-8 wk
17 May
8 Jun
5 wk after
22 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
15 – 29 Mar
29 Apr
6-8 wk
10 May
10 Jun
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
10 Mar – 7 Apr
13 May
4-8 wk
5 May
10 Jun
4 wk after
5 May
31 May
4 wk after
Foxglove
Digitalis purpurea
29 Jan – 12 Feb
8-10 wk
9 Apr
0 wk
22 Apr
2 wk after
Busy lizzie
Impatiens walleriana
6 Mar – 3 Apr
23 May
8-12 wk
29 May
18 Jul
7 wk after
Creeping zinnia
Sanvitalia procumbens
22 Mar – 5 Apr
7 May
6-8 wk
17 May
18 Jun
5 wk after
Hyacinth bean
Dolichos lablab
Season too short
5 – 19 Apr
5 Apr
4-6 wk
17 May
5 wk after
Chinese lantern
Physalis alkekengi
31 Jan – 14 Feb
25 Apr
8-10 wk
11 Apr
20 Jun
0 wk
Love in a mist
Nigella damascena
9 Apr
5 Jul
0 wk
3 Apr
25 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
22 Mar – 5 Apr
17 Apr
6-8 wk
17 May
29 May
5 wk after
22 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
17 Jan – 14 Feb
25 Apr
8-12 wk
11 Apr
20 Jun
0 wk
Cardoon
Cynara cardunculus
22 Feb – 22 Mar
26 Mar
8-12 wk
17 May
21 May
5 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
22 Feb – 22 Mar
28 Mar
8-12 wk
17 May
23 May
5 wk after
Globe amaranth
Gomphrena globosa
Fleece
22 Mar – 5 Apr
11 Apr
6-8 wk
17 May
23 May
5 wk after
Corn poppy
Papaver rhoeas
9 Apr
20 Jul
0 wk
3 Apr
10 Jul
1 wk before
Snapdragon
Antirrhinum majus
15 Jan – 12 Feb
15 May
8-12 wk
9 Apr
10 Jul
0 wk
14 Apr
30 Jun
1 wk after
Flossflower
Ageratum houstonianum
20 Mar – 3 Apr
23 Apr
8-10 wk
29 May
18 Jun
7 wk after
Sweet pea
Lathyrus odoratus
12 Feb – 5 Mar
5 Jun
5-8 wk
9 Apr
10 Jul
0 wk
Stock
Matthiola incana
12 – 26 Feb
8 Jun
6-8 wk
9 Apr
20 Jul
0 wk
22 Apr
10 Jul
2 wk after
Wormwood
Artemisia absinthium
12 – 26 Feb
9 May
6-8 wk
9 Apr
20 Jun
0 wk
22 Apr
10 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
5 – 19 Apr
20 Apr
4-6 wk
17 May
18 May
5 wk after
Garden pansy
Viola × wittrockiana
29 Jan – 12 Feb
25 May
8-10 wk
9 Apr
20 Jul
0 wk
14 Apr
10 Jul
1 wk after
Petunia
Petunia
22 Feb – 22 Mar
13 Apr
8-12 wk
17 May
8 Jun
5 wk after
Sweet Scabious
Scabiosa atropurpurea
14 – 28 Feb
9 May
6-8 wk
11 Apr
20 Jun
0 wk
20 May
10 Jun
6 wk after
Common zinnia
Zinnia elegans
5 – 19 Apr
5 May
4-6 wk
17 May
2 Jun
5 wk after
Common morning glory
Ipomoea purpurea
Fleece
12 – 26 Apr
12 May
3-5 wk
17 May
2 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
5 – 19 Apr
13 May
4-6 wk
17 May
10 Jun
5 wk after
20 May
31 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
6 Mar – 3 Apr
27 Apr
8-12 wk
29 May
22 Jun
7 wk after
Bee balm
Monarda didyma
15 Jan – 12 Feb
25 Apr
8-12 wk
9 Apr
20 Jun
0 wk
5 May
10 Jun
4 wk after
Yarrow
Achillea millefolium
12 – 26 Feb
9 Apr
6-8 wk
9 Apr
21 May
0 wk
22 Apr
11 May
2 wk after
Safflower
Carthamus tinctorius
9 Apr
20 Jun
0 wk
3 Apr
10 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
12 – 26 Feb
29 May
6-8 wk
9 Apr
10 Jul
0 wk
22 Feb
30 Jun
7 wk before
Bishop's flower
Ammi majus
26 Feb – 12 Mar
12 Jun
4-6 wk
9 Apr
10 Jul
0 wk
22 Apr
30 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
22 Feb – 8 Mar
12 Mar
10-12 wk
17 May
21 May
5 wk after
Sunflower
Helianthus annuus
19 – 26 Apr
17 Jun
3-4 wk
17 May
8 Jul
5 wk after
5 May
28 Jun
4 wk after
China aster
Callistephus chinensis
22 Mar – 5 Apr
6 Jun
6-8 wk
17 May
18 Jul
5 wk after
20 May
8 Jul
6 wk after
Annual phlox
Phlox drummondii
8 – 22 Mar
7 May
6-8 wk
3 May
18 Jun
3 wk after
20 May
8 Jun
6 wk after
Hollyhock
Alcea rosea
12 – 26 Feb
6-8 wk
9 Apr
0 wk
22 Apr
2 wk after
Alpine delphinium
Delphinium elatum
15 Jan – 12 Feb
25 Apr
8-12 wk
9 Apr
20 Jun
0 wk
5 May
10 Jun
4 wk after
African marigold
Tagetes erecta
22 Mar – 5 Apr
7 May
6-8 wk
17 May
18 Jun
5 wk after
Black-eyed Susan
Rudbeckia hirta
14 – 28 Feb
27 May
6-8 wk
11 Apr
8 Jul
0 wk
20 May
28 Jun
6 wk after
Wood sage
Salvia nemorosa
29 Jan – 12 Feb
15 Apr
8-10 wk
9 Apr
10 Jun
0 wk
5 May
31 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
8 Mar – 5 Apr
21 Apr
6-10 wk
17 May
2 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
9 Apr
20 Jul
0 wk
3 Apr
10 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
8 – 22 Mar
8 May
8-10 wk
17 May
3 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
12 – 26 Feb
9 May
6-8 wk
9 Apr
20 Jun
0 wk
22 Apr
10 Jun
2 wk after