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Rel. frost
Last spring frost (0°C) 21 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 158 days 21 Apr – 26 Sep
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)
3 – 17 Mar
23 Jun
5-7 wk
21 Apr
28 Jul
0 wk
15 Apr
18 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Mar
5 Jul
4-6 wk
21 Apr
2 Aug
0 wk
15 Apr
23 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
14 Feb – 14 Mar
23 Feb
8-12 wk
9 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Mar
18 Jun
5-7 wk
21 Apr
23 Jul
0 wk
8 Apr
13 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
15 – 22 Apr
19 Apr
3-4 wk
13 May
3 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
1 Jun
4-5 wk
3 Jun
29 Jun
6 wk after
1 Jun
19 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
15 – 22 May
3-4 wk
12 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Jan – 24 Feb
2 Apr
8-12 wk
21 Apr
28 May
0 wk
4 May
18 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
15 Apr
17 Jun
1 wk before
15 Apr
7 Jun
1 wk before
Maize
Zea mays
Greenhouse
24 – 31 Mar
14 May
3-4 wk
21 Apr
4 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
28 Mar – 4 Apr
12 Jul
3-4 wk
25 Apr
2 Aug
1 wk after
4 May
23 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 Apr
13 Jul
0 wk
8 Apr
3 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Mar
18 Jun
5-7 wk
21 Apr
23 Jul
0 wk
8 Apr
13 Jul
2 wk before
Potato
Solanum tuberosum
15 – 29 Mar
2 Jun
4-6 wk
26 Apr
30 Jun
1 wk after
26 Apr
20 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Mar
28 Jun
5-7 wk
21 Apr
2 Aug
0 wk
15 Apr
23 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
15 – 22 Apr
29 May
3-4 wk
13 May
19 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
28 Mar – 4 Apr
15 Jun
3-4 wk
25 Apr
6 Jul
1 wk after
4 May
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Mar
30 Jun
4-6 wk
21 Apr
28 Jul
0 wk
Lettuce
Lactuca sativa
24 – 31 Mar
17 Jul
3-4 wk
21 Apr
7 Aug
0 wk
15 Apr
28 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Mar
30 Jun
4-6 wk
21 Apr
28 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Mar
9 Jun
2-4 wk
8 Apr
23 Jun
2 wk before
8 Apr
13 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
15 Apr
17 Jun
1 wk before
15 Apr
7 Jun
1 wk before
Spinach
Spinacia oleracea
24 – 31 Mar
1 Aug
3-4 wk
21 Apr
22 Aug
0 wk
1 Apr
12 Aug
3 wk before
Sweet potato
Ipomoea batatas
23 May – 6 Jun
4-6 wk
4 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
24 Feb – 10 Mar
23 Apr
6-8 wk
21 Apr
4 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
15 – 29 Apr
26 Apr
2-4 wk
13 May
3 wk after
1 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Mar
30 Jun
4-6 wk
21 Apr
28 Jul
0 wk
Garden pea
Pisum sativum
24 – 31 Mar
2 Jul
3-4 wk
21 Apr
23 Jul
0 wk
15 Apr
13 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
1 – 15 Apr
7 May
4-6 wk
13 May
4 Jun
3 wk after
Lemon balm
Melissa officinalis
10 – 24 Feb
28 May
8-10 wk
21 Apr
23 Jul
0 wk
17 May
13 Jul
4 wk after
Dill
Anethum graveolens
15 Apr
2 Aug
1 wk before
Wild chives
Allium schoenoprasum
24 Feb – 10 Mar
11 Jun
6-8 wk
21 Apr
23 Jul
0 wk
15 Apr
13 Jul
1 wk before
Spearmint
Mentha spicata
27 Jan – 24 Feb
28 May
8-12 wk
21 Apr
23 Jul
0 wk
17 May
13 Jul
4 wk after
Coriander
Coriandrum sativum
21 Apr
22 Aug
0 wk
4 May
12 Aug
2 wk after
Garden sage
Salvia officinalis
14 – 28 Feb
13 May
8-10 wk
25 Apr
8 Jul
1 wk after
Common thyme
Thymus vulgaris
10 – 24 Feb
18 May
8-10 wk
21 Apr
13 Jul
0 wk
Oregano
Origanum vulgare
24 Feb – 10 Mar
1 Jun
6-8 wk
21 Apr
13 Jul
0 wk
17 May
3 Jul
4 wk after
Parsley
Petroselinum crispum
24 Feb – 10 Mar
1 Jun
6-8 wk
21 Apr
13 Jul
0 wk
15 Apr
3 Jul
1 wk before
Rosemary
Salvia rosmarinus
17 Jan – 14 Feb
8 Apr
10-14 wk
25 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
15 – 22 Apr
14 May
3-4 wk
13 May
4 Jun
3 wk after
Cornflower
Centaurea cyanus
21 Apr
23 Jul
0 wk
15 Apr
13 Jul
1 wk before
Statice
Limonium sinuatum
4 – 18 Mar
1 Apr
8-10 wk
13 May
27 May
3 wk after
Sweet William
Dianthus barbatus
24 Feb – 10 Mar
6-8 wk
21 Apr
0 wk
26 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
18 Mar – 1 Apr
15 Apr
6-8 wk
13 May
27 May
3 wk after
4 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Mar
19 Apr
6-8 wk
11 May
31 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
22 Mar – 19 Apr
3 May
4-8 wk
17 May
31 May
4 wk after
17 May
21 May
4 wk after
Foxglove
Digitalis purpurea
10 – 24 Feb
8-10 wk
21 Apr
0 wk
4 May
2 wk after
Busy lizzie
Impatiens walleriana
11 Mar – 8 Apr
25 May
8-12 wk
3 Jun
20 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
18 Mar – 1 Apr
25 Apr
6-8 wk
13 May
6 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
1 – 15 Apr
7 Apr
4-6 wk
13 May
3 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Feb
28 Apr
8-10 wk
25 Apr
23 Jun
1 wk after
Love in a mist
Nigella damascena
21 Apr
8 Jul
0 wk
15 Apr
28 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
18 Mar – 1 Apr
5 Apr
6-8 wk
13 May
17 May
3 wk after
4 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
31 Jan – 28 Feb
28 Apr
8-12 wk
25 Apr
23 Jun
1 wk after
Cardoon
Cynara cardunculus
18 Feb – 18 Mar
29 Mar
8-12 wk
13 May
24 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
18 Feb – 18 Mar
30 Mar
8-12 wk
13 May
25 May
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
18 Mar – 1 Apr
13 Apr
6-8 wk
13 May
25 May
3 wk after
Corn poppy
Papaver rhoeas
21 Apr
23 Jul
0 wk
15 Apr
13 Jul
1 wk before
Snapdragon
Antirrhinum majus
27 Jan – 24 Feb
18 May
8-12 wk
21 Apr
13 Jul
0 wk
26 Apr
3 Jul
1 wk after
Flossflower
Ageratum houstonianum
25 Mar – 8 Apr
11 Apr
8-10 wk
3 Jun
6 Jun
6 wk after
Sweet pea
Lathyrus odoratus
24 Feb – 17 Mar
8 Jun
5-8 wk
21 Apr
13 Jul
0 wk
Stock
Matthiola incana
24 Feb – 10 Mar
11 Jun
6-8 wk
21 Apr
23 Jul
0 wk
4 May
13 Jul
2 wk after
Wormwood
Artemisia absinthium
24 Feb – 10 Mar
12 May
6-8 wk
21 Apr
23 Jun
0 wk
4 May
13 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
1 – 15 Apr
22 Apr
4-6 wk
13 May
20 May
3 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Feb
28 May
8-10 wk
21 Apr
23 Jul
0 wk
26 Apr
13 Jul
1 wk after
Petunia
Petunia
18 Feb – 18 Mar
1 Apr
8-12 wk
13 May
27 May
3 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Feb – 14 Mar
12 May
6-8 wk
25 Apr
23 Jun
1 wk after
1 Jun
13 Jun
6 wk after
Common zinnia
Zinnia elegans
1 – 15 Apr
7 May
4-6 wk
13 May
4 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
8 – 22 Apr
14 May
3-5 wk
13 May
4 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
1 – 15 Apr
3 May
4-6 wk
13 May
31 May
3 wk after
1 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
11 Mar – 8 Apr
29 Apr
8-12 wk
3 Jun
24 Jun
6 wk after
Bee balm
Monarda didyma
27 Jan – 24 Feb
28 Apr
8-12 wk
21 Apr
23 Jun
0 wk
17 May
13 Jun
4 wk after
Yarrow
Achillea millefolium
24 Feb – 10 Mar
12 Apr
6-8 wk
21 Apr
24 May
0 wk
4 May
14 May
2 wk after
Safflower
Carthamus tinctorius
21 Apr
23 Jun
0 wk
15 Apr
13 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
24 Feb – 10 Mar
1 Jun
6-8 wk
21 Apr
13 Jul
0 wk
6 Mar
3 Jul
7 wk before
Bishop's flower
Ammi majus
10 – 24 Mar
15 Jun
4-6 wk
21 Apr
13 Jul
0 wk
4 May
3 Jul
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
18 Feb – 4 Mar
2 Mar
10-12 wk
13 May
3 wk after
Sunflower
Helianthus annuus
15 – 22 Apr
16 Jun
3-4 wk
13 May
7 Jul
3 wk after
17 May
27 Jun
4 wk after
China aster
Callistephus chinensis
18 Mar – 1 Apr
5 Jun
6-8 wk
13 May
17 Jul
3 wk after
1 Jun
7 Jul
6 wk after
Annual phlox
Phlox drummondii
14 – 28 Mar
25 Apr
6-8 wk
9 May
6 Jun
3 wk after
1 Jun
6 wk after
Hollyhock
Alcea rosea
24 Feb – 10 Mar
6-8 wk
21 Apr
0 wk
4 May
2 wk after
Alpine delphinium
Delphinium elatum
27 Jan – 24 Feb
28 Apr
8-12 wk
21 Apr
23 Jun
0 wk
17 May
13 Jun
4 wk after
African marigold
Tagetes erecta
18 Mar – 1 Apr
25 Apr
6-8 wk
13 May
6 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
28 Feb – 14 Mar
26 May
6-8 wk
25 Apr
7 Jul
1 wk after
1 Jun
27 Jun
6 wk after
Wood sage
Salvia nemorosa
10 – 24 Feb
18 Apr
8-10 wk
21 Apr
13 Jun
0 wk
17 May
3 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
4 Mar – 1 Apr
23 Apr
6-10 wk
13 May
4 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
21 Apr
23 Jul
0 wk
15 Apr
13 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
4 – 18 Mar
4 May
8-10 wk
13 May
29 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
24 Feb – 10 Mar
12 May
6-8 wk
21 Apr
23 Jun
0 wk
4 May
13 Jun
2 wk after