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Rel. frost
Last spring frost (0°C) 25 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 159 days 25 Apr – 1 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 Mar
16 Jun
5-7 wk
25 Apr
21 Jul
0 wk
29 Apr
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
14 – 28 Mar
28 Jun
4-6 wk
25 Apr
26 Jul
0 wk
29 Apr
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
13 Feb – 13 Mar
8-12 wk
8 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Mar
11 Jun
5-7 wk
25 Apr
16 Jul
0 wk
25 Apr
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
10 – 17 Apr
16 May
3-4 wk
8 May
6 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
26 Apr – 3 May
5 Jun
4-5 wk
31 May
3 Jul
5 wk after
13 Jun
23 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
13 – 20 May
3-4 wk
10 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
31 Jan – 28 Feb
30 Mar
8-12 wk
25 Apr
25 May
0 wk
16 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
29 Apr
14 Jun
1 wk after
29 Apr
4 Jun
1 wk after
Maize
Zea mays
Greenhouse
28 Mar – 4 Apr
6 May
3-4 wk
25 Apr
27 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
4 – 11 Apr
5 Jul
3-4 wk
2 May
26 Jul
1 wk after
16 May
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 Apr
6 Jul
0 wk
25 Apr
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Mar
11 Jun
5-7 wk
25 Apr
16 Jul
0 wk
25 Apr
6 Jul
0 wk
Potato
Solanum tuberosum
30 Mar – 13 Apr
28 May
4-6 wk
11 May
25 Jun
2 wk after
11 May
15 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Mar
21 Jun
5-7 wk
25 Apr
26 Jul
0 wk
29 Apr
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
19 – 26 Apr
21 May
3-4 wk
17 May
11 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
4 – 11 Apr
9 Jun
3-4 wk
2 May
30 Jun
1 wk after
16 May
20 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
14 – 28 Mar
23 Jun
4-6 wk
25 Apr
21 Jul
0 wk
Lettuce
Lactuca sativa
28 Mar – 4 Apr
10 Jul
3-4 wk
25 Apr
31 Jul
0 wk
29 Apr
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
14 – 28 Mar
23 Jun
4-6 wk
25 Apr
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
28 Mar – 11 Apr
2 Jun
2-4 wk
25 Apr
16 Jun
0 wk
25 Apr
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
29 Apr
14 Jun
1 wk after
29 Apr
4 Jun
1 wk after
Spinach
Spinacia oleracea
28 Mar – 4 Apr
25 Jul
3-4 wk
25 Apr
15 Aug
0 wk
21 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
27 May – 10 Jun
4-6 wk
8 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
28 Feb – 14 Mar
15 Apr
6-8 wk
25 Apr
27 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
10 – 24 Apr
23 May
2-4 wk
8 May
6 Jun
2 wk after
30 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
14 – 28 Mar
23 Jun
4-6 wk
25 Apr
21 Jul
0 wk
Garden pea
Pisum sativum
28 Mar – 4 Apr
25 Jun
3-4 wk
25 Apr
16 Jul
0 wk
29 Apr
6 Jul
1 wk after

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