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