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