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Rel. frost
Last spring frost (0°C) 22 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 160 days 22 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)
4 – 18 Mar
19 Jun
5-7 wk
22 Apr
24 Jul
0 wk
16 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Mar
1 Jul
4-6 wk
22 Apr
29 Jul
0 wk
16 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
15 Feb – 15 Mar
8-12 wk
10 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Mar
14 Jun
5-7 wk
22 Apr
19 Jul
0 wk
9 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
12 – 19 Apr
18 May
3-4 wk
10 May
8 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
28 Apr – 5 May
8 Jun
4-5 wk
2 Jun
6 Jul
6 wk after
2 Jun
26 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)
28 Jan – 25 Feb
1 Apr
8-12 wk
22 Apr
27 May
0 wk
5 May
17 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 Apr
16 Jun
1 wk before
16 Apr
6 Jun
1 wk before
Maize
Zea mays
Greenhouse
25 Mar – 1 Apr
8 May
3-4 wk
22 Apr
29 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Mar – 1 Apr
8 Jul
3-4 wk
22 Apr
29 Jul
0 wk
5 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 Apr
9 Jul
0 wk
9 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Mar
14 Jun
5-7 wk
22 Apr
19 Jul
0 wk
9 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
16 – 30 Mar
30 May
4-6 wk
27 Apr
27 Jun
1 wk after
27 Apr
17 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Mar
24 Jun
5-7 wk
22 Apr
29 Jul
0 wk
16 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
21 – 28 Apr
23 May
3-4 wk
19 May
13 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Mar – 1 Apr
11 Jun
3-4 wk
22 Apr
2 Jul
0 wk
5 May
22 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Mar
26 Jun
4-6 wk
22 Apr
24 Jul
0 wk
Lettuce
Lactuca sativa
25 Mar – 1 Apr
13 Jul
3-4 wk
22 Apr
3 Aug
0 wk
16 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Mar
26 Jun
4-6 wk
22 Apr
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Mar
3 Jun
2-4 wk
9 Apr
17 Jun
2 wk before
9 Apr
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 Apr
16 Jun
1 wk before
16 Apr
6 Jun
1 wk before
Spinach
Spinacia oleracea
25 Mar – 1 Apr
28 Jul
3-4 wk
22 Apr
18 Aug
0 wk
2 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
24 May – 7 Jun
4-6 wk
5 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
25 Feb – 11 Mar
17 Apr
6-8 wk
22 Apr
29 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
12 – 26 Apr
25 May
2-4 wk
10 May
8 Jun
3 wk after
18 May
29 May
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Mar
26 Jun
4-6 wk
22 Apr
24 Jul
0 wk
Garden pea
Pisum sativum
25 Mar – 1 Apr
28 Jun
3-4 wk
22 Apr
19 Jul
0 wk
16 Apr
9 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
7 – 21 Apr
1 May
4-6 wk
19 May
29 May
4 wk after
Lemon balm
Melissa officinalis
11 – 25 Feb
24 May
8-10 wk
22 Apr
19 Jul
0 wk
18 May
9 Jul
4 wk after
Dill
Anethum graveolens
16 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
25 Feb – 11 Mar
7 Jun
6-8 wk
22 Apr
19 Jul
0 wk
16 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
28 Jan – 25 Feb
24 May
8-12 wk
22 Apr
19 Jul
0 wk
18 May
9 Jul
4 wk after
Coriander
Coriandrum sativum
22 Apr
18 Aug
0 wk
5 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
11 – 25 Feb
9 May
8-10 wk
22 Apr
4 Jul
0 wk
Common thyme
Thymus vulgaris
11 – 25 Feb
14 May
8-10 wk
22 Apr
9 Jul
0 wk
Oregano
Origanum vulgare
25 Feb – 11 Mar
28 May
6-8 wk
22 Apr
9 Jul
0 wk
18 May
29 Jun
4 wk after
Parsley
Petroselinum crispum
25 Feb – 11 Mar
28 May
6-8 wk
22 Apr
9 Jul
0 wk
16 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
14 Jan – 11 Feb
7 Apr
10-14 wk
22 Apr
16 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
21 – 28 Apr
8 May
3-4 wk
19 May
29 May
4 wk after
Cornflower
Centaurea cyanus
22 Apr
19 Jul
0 wk
16 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
10 – 24 Mar
26 Mar
8-10 wk
19 May
21 May
4 wk after
Sweet William
Dianthus barbatus
25 Feb – 11 Mar
6-8 wk
22 Apr
0 wk
27 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
24 Mar – 7 Apr
9 Apr
6-8 wk
19 May
21 May
4 wk after
5 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
19 Mar – 2 Apr
14 Apr
6-8 wk
14 May
26 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
23 Mar – 20 Apr
28 Apr
4-8 wk
18 May
26 May
4 wk after
18 May
4 wk after
Foxglove
Digitalis purpurea
11 – 25 Feb
8-10 wk
22 Apr
0 wk
5 May
2 wk after
Busy lizzie
Impatiens walleriana
10 Mar – 7 Apr
19 May
8-12 wk
2 Jun
14 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
24 Mar – 7 Apr
19 Apr
6-8 wk
19 May
31 May
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
7 – 21 Apr
4-6 wk
19 May
4 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Feb
24 Apr
8-10 wk
22 Apr
19 Jun
0 wk
Love in a mist
Nigella damascena
22 Apr
4 Jul
0 wk
16 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
24 Mar – 7 Apr
30 Mar
6-8 wk
19 May
4 wk after
5 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
28 Jan – 25 Feb
24 Apr
8-12 wk
22 Apr
19 Jun
0 wk
Cardoon
Cynara cardunculus
24 Feb – 24 Mar
25 Mar
8-12 wk
19 May
20 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
24 Feb – 24 Mar
24 Mar
8-12 wk
19 May
19 May
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
24 Mar – 7 Apr
7 Apr
6-8 wk
19 May
19 May
4 wk after
Corn poppy
Papaver rhoeas
22 Apr
19 Jul
0 wk
16 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
28 Jan – 25 Feb
14 May
8-12 wk
22 Apr
9 Jul
0 wk
27 Apr
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
24 Mar – 7 Apr
5 Apr
8-10 wk
2 Jun
6 wk after
Sweet pea
Lathyrus odoratus
25 Feb – 18 Mar
4 Jun
5-8 wk
22 Apr
9 Jul
0 wk
Stock
Matthiola incana
25 Feb – 11 Mar
7 Jun
6-8 wk
22 Apr
19 Jul
0 wk
5 May
9 Jul
2 wk after
Wormwood
Artemisia absinthium
25 Feb – 11 Mar
8 May
6-8 wk
22 Apr
19 Jun
0 wk
5 May
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
7 – 21 Apr
16 Apr
4-6 wk
19 May
4 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Feb
24 May
8-10 wk
22 Apr
19 Jul
0 wk
27 Apr
9 Jul
1 wk after
Petunia
Petunia
24 Feb – 24 Mar
26 Mar
8-12 wk
19 May
21 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
25 Feb – 11 Mar
8 May
6-8 wk
22 Apr
19 Jun
0 wk
2 Jun
9 Jun
6 wk after
Common zinnia
Zinnia elegans
7 – 21 Apr
1 May
4-6 wk
19 May
29 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
14 – 28 Apr
8 May
3-5 wk
19 May
29 May
4 wk after
Garden cosmos
Cosmos bipinnatus
7 – 21 Apr
28 Apr
4-6 wk
19 May
26 May
4 wk after
2 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
10 Mar – 7 Apr
23 Apr
8-12 wk
2 Jun
18 Jun
6 wk after
Bee balm
Monarda didyma
28 Jan – 25 Feb
24 Apr
8-12 wk
22 Apr
19 Jun
0 wk
18 May
9 Jun
4 wk after
Yarrow
Achillea millefolium
25 Feb – 11 Mar
8 Apr
6-8 wk
22 Apr
20 May
0 wk
5 May
10 May
2 wk after
Safflower
Carthamus tinctorius
22 Apr
19 Jun
0 wk
16 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
25 Feb – 11 Mar
28 May
6-8 wk
22 Apr
9 Jul
0 wk
7 Mar
29 Jun
7 wk before
Bishop's flower
Ammi majus
11 – 25 Mar
11 Jun
4-6 wk
22 Apr
9 Jul
0 wk
5 May
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
15 Feb – 1 Mar
19 Mar
10-12 wk
10 May
28 May
3 wk after
Sunflower
Helianthus annuus
21 – 28 Apr
15 Jun
3-4 wk
19 May
6 Jul
4 wk after
18 May
26 Jun
4 wk after
China aster
Callistephus chinensis
24 Mar – 7 Apr
4 Jun
6-8 wk
19 May
16 Jul
4 wk after
2 Jun
6 Jul
6 wk after
Annual phlox
Phlox drummondii
15 – 29 Mar
19 Apr
6-8 wk
10 May
31 May
3 wk after
2 Jun
6 wk after
Hollyhock
Alcea rosea
25 Feb – 11 Mar
6-8 wk
22 Apr
0 wk
5 May
2 wk after
Alpine delphinium
Delphinium elatum
28 Jan – 25 Feb
24 Apr
8-12 wk
22 Apr
19 Jun
0 wk
18 May
9 Jun
4 wk after
African marigold
Tagetes erecta
24 Mar – 7 Apr
19 Apr
6-8 wk
19 May
31 May
4 wk after
Black-eyed Susan
Rudbeckia hirta
25 Feb – 11 Mar
25 May
6-8 wk
22 Apr
6 Jul
0 wk
2 Jun
26 Jun
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Feb
14 Apr
8-10 wk
22 Apr
9 Jun
0 wk
18 May
30 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
10 Mar – 7 Apr
17 Apr
6-10 wk
19 May
29 May
4 wk after
California goldenpoppy
Eschscholzia californica
22 Apr
19 Jul
0 wk
16 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
10 – 24 Mar
11 May
8-10 wk
19 May
6 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
25 Feb – 11 Mar
8 May
6-8 wk
22 Apr
19 Jun
0 wk
5 May
9 Jun
2 wk after