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Rel. frost
Last spring frost (0°C) 14 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 175 days 14 Apr – 6 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)
24 Feb – 10 Mar
18 Jun
5-7 wk
14 Apr
23 Jul
0 wk
7 Apr
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Mar
30 Jun
4-6 wk
14 Apr
28 Jul
0 wk
7 Apr
18 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
31 Jan – 28 Feb
8 Feb
8-12 wk
25 Apr
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
24 Feb – 10 Mar
13 Jun
5-7 wk
14 Apr
18 Jul
0 wk
2 Apr
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
28 Mar – 4 Apr
21 May
3-4 wk
25 Apr
11 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
15 – 22 Apr
9 Jun
4-5 wk
20 May
7 Jul
5 wk after
20 May
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
29 Apr – 6 May
3-4 wk
27 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
20 Jan – 17 Feb
1 Apr
8-12 wk
14 Apr
27 May
0 wk
24 Apr
17 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
7 Apr
16 Jun
1 wk before
7 Apr
6 Jun
1 wk before
Maize
Zea mays
Greenhouse
17 – 24 Mar
11 May
3-4 wk
14 Apr
1 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
23 – 30 Mar
7 Jul
3-4 wk
20 Apr
28 Jul
1 wk after
24 Apr
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
14 Apr
8 Jul
0 wk
2 Apr
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
24 Feb – 10 Mar
13 Jun
5-7 wk
14 Apr
18 Jul
0 wk
2 Apr
8 Jul
2 wk before
Potato
Solanum tuberosum
8 – 22 Mar
30 May
4-6 wk
19 Apr
27 Jun
1 wk after
19 Apr
17 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
24 Feb – 10 Mar
23 Jun
5-7 wk
14 Apr
28 Jul
0 wk
7 Apr
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
5 – 12 Apr
26 May
3-4 wk
3 May
16 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
23 – 30 Mar
9 Jun
3-4 wk
20 Apr
30 Jun
1 wk after
24 Apr
20 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Mar
25 Jun
4-6 wk
14 Apr
23 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Mar
12 Jul
3-4 wk
14 Apr
2 Aug
0 wk
7 Apr
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Mar
25 Jun
4-6 wk
14 Apr
23 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Mar
4 Jun
2-4 wk
2 Apr
18 Jun
2 wk before
2 Apr
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
7 Apr
16 Jun
1 wk before
7 Apr
6 Jun
1 wk before
Spinach
Spinacia oleracea
17 – 24 Mar
27 Jul
3-4 wk
14 Apr
17 Aug
0 wk
27 Mar
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
11 – 25 May
4-6 wk
22 Jun
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
17 Feb – 3 Mar
20 Apr
6-8 wk
14 Apr
1 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
28 Mar – 11 Apr
28 May
2-4 wk
25 Apr
11 Jun
2 wk after
5 May
1 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Mar
25 Jun
4-6 wk
14 Apr
23 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Mar
27 Jun
3-4 wk
14 Apr
18 Jul
0 wk
7 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
22 Mar – 5 Apr
4 May
4-6 wk
3 May
1 Jun
3 wk after
Lemon balm
Melissa officinalis
3 – 17 Feb
23 May
8-10 wk
14 Apr
18 Jul
0 wk
5 May
8 Jul
3 wk after
Dill
Anethum graveolens
7 Apr
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
17 Feb – 3 Mar
6 Jun
6-8 wk
14 Apr
18 Jul
0 wk
7 Apr
8 Jul
1 wk before
Spearmint
Mentha spicata
20 Jan – 17 Feb
23 May
8-12 wk
14 Apr
18 Jul
0 wk
5 May
8 Jul
3 wk after
Coriander
Coriandrum sativum
14 Apr
17 Aug
0 wk
24 Apr
7 Aug
1 wk after
Garden sage
Salvia officinalis
9 – 23 Feb
8 May
8-10 wk
20 Apr
3 Jul
1 wk after
Common thyme
Thymus vulgaris
3 – 17 Feb
13 May
8-10 wk
14 Apr
8 Jul
0 wk
Oregano
Origanum vulgare
17 Feb – 3 Mar
27 May
6-8 wk
14 Apr
8 Jul
0 wk
5 May
28 Jun
3 wk after
Parsley
Petroselinum crispum
17 Feb – 3 Mar
27 May
6-8 wk
14 Apr
8 Jul
0 wk
7 Apr
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
12 Jan – 9 Feb
9 Apr
10-14 wk
20 Apr
18 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
5 – 12 Apr
11 May
3-4 wk
3 May
1 Jun
3 wk after
Cornflower
Centaurea cyanus
14 Apr
18 Jul
0 wk
7 Apr
8 Jul
1 wk before
Statice
Limonium sinuatum
22 Feb – 8 Mar
28 Mar
8-10 wk
3 May
23 May
3 wk after
Sweet William
Dianthus barbatus
17 Feb – 3 Mar
6-8 wk
14 Apr
0 wk
19 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
8 – 22 Mar
11 Apr
6-8 wk
3 May
23 May
3 wk after
22 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
3 – 17 Mar
17 Apr
6-8 wk
28 Apr
29 May
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
10 Mar – 7 Apr
1 May
4-8 wk
5 May
29 May
3 wk after
5 May
19 May
3 wk after
Foxglove
Digitalis purpurea
3 – 17 Feb
8-10 wk
14 Apr
0 wk
24 Apr
1 wk after
Busy lizzie
Impatiens walleriana
25 Feb – 25 Mar
22 May
8-12 wk
20 May
17 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Mar
21 Apr
6-8 wk
3 May
2 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Mar – 5 Apr
4 Apr
4-6 wk
3 May
3 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Feb
23 Apr
8-10 wk
20 Apr
18 Jun
1 wk after
Love in a mist
Nigella damascena
14 Apr
3 Jul
0 wk
7 Apr
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
8 – 22 Mar
1 Apr
6-8 wk
3 May
13 May
3 wk after
22 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
26 Jan – 23 Feb
23 Apr
8-12 wk
20 Apr
18 Jun
1 wk after
Cardoon
Cynara cardunculus
8 Feb – 8 Mar
24 Mar
8-12 wk
3 May
19 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
8 Feb – 8 Mar
27 Mar
8-12 wk
3 May
22 May
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
8 – 22 Mar
10 Apr
6-8 wk
3 May
22 May
3 wk after
Corn poppy
Papaver rhoeas
14 Apr
18 Jul
0 wk
7 Apr
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
20 Jan – 17 Feb
13 May
8-12 wk
14 Apr
8 Jul
0 wk
19 Apr
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
11 – 25 Mar
7 Apr
8-10 wk
20 May
2 Jun
5 wk after
Sweet pea
Lathyrus odoratus
17 Feb – 10 Mar
3 Jun
5-8 wk
14 Apr
8 Jul
0 wk
Stock
Matthiola incana
17 Feb – 3 Mar
6 Jun
6-8 wk
14 Apr
18 Jul
0 wk
24 Apr
8 Jul
1 wk after
Wormwood
Artemisia absinthium
17 Feb – 3 Mar
7 May
6-8 wk
14 Apr
18 Jun
0 wk
24 Apr
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
22 Mar – 5 Apr
19 Apr
4-6 wk
3 May
17 May
3 wk after
Garden pansy
Viola × wittrockiana
3 – 17 Feb
23 May
8-10 wk
14 Apr
18 Jul
0 wk
19 Apr
8 Jul
1 wk after
Petunia
Petunia
8 Feb – 8 Mar
28 Mar
8-12 wk
3 May
23 May
3 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Feb – 9 Mar
7 May
6-8 wk
20 Apr
18 Jun
1 wk after
20 May
8 Jun
5 wk after
Common zinnia
Zinnia elegans
22 Mar – 5 Apr
4 May
4-6 wk
3 May
1 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
29 Mar – 12 Apr
11 May
3-5 wk
3 May
1 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
22 Mar – 5 Apr
1 May
4-6 wk
3 May
29 May
3 wk after
20 May
5 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
25 Feb – 25 Mar
26 Apr
8-12 wk
20 May
21 Jun
5 wk after
Bee balm
Monarda didyma
20 Jan – 17 Feb
23 Apr
8-12 wk
14 Apr
18 Jun
0 wk
5 May
8 Jun
3 wk after
Yarrow
Achillea millefolium
17 Feb – 3 Mar
7 Apr
6-8 wk
14 Apr
19 May
0 wk
24 Apr
9 May
1 wk after
Safflower
Carthamus tinctorius
14 Apr
18 Jun
0 wk
7 Apr
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
17 Feb – 3 Mar
27 May
6-8 wk
14 Apr
8 Jul
0 wk
6 Mar
28 Jun
6 wk before
Bishop's flower
Ammi majus
3 – 17 Mar
10 Jun
4-6 wk
14 Apr
8 Jul
0 wk
24 Apr
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
8 – 22 Feb
28 Feb
10-12 wk
3 May
9 May
3 wk after
Sunflower
Helianthus annuus
5 – 12 Apr
17 Jun
3-4 wk
3 May
8 Jul
3 wk after
5 May
28 Jun
3 wk after
China aster
Callistephus chinensis
8 – 22 Mar
6 Jun
6-8 wk
3 May
18 Jul
3 wk after
20 May
8 Jul
5 wk after
Annual phlox
Phlox drummondii
28 Feb – 14 Mar
21 Apr
6-8 wk
25 Apr
2 Jun
2 wk after
20 May
23 May
5 wk after
Hollyhock
Alcea rosea
17 Feb – 3 Mar
6-8 wk
14 Apr
0 wk
24 Apr
1 wk after
Alpine delphinium
Delphinium elatum
20 Jan – 17 Feb
23 Apr
8-12 wk
14 Apr
18 Jun
0 wk
5 May
8 Jun
3 wk after
African marigold
Tagetes erecta
8 – 22 Mar
21 Apr
6-8 wk
3 May
2 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
23 Feb – 9 Mar
27 May
6-8 wk
20 Apr
8 Jul
1 wk after
20 May
28 Jun
5 wk after
Wood sage
Salvia nemorosa
3 – 17 Feb
13 Apr
8-10 wk
14 Apr
8 Jun
0 wk
5 May
29 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
22 Feb – 22 Mar
20 Apr
6-10 wk
3 May
1 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
14 Apr
18 Jul
0 wk
7 Apr
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
22 Feb – 8 Mar
12 May
8-10 wk
3 May
7 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
17 Feb – 3 Mar
7 May
6-8 wk
14 Apr
18 Jun
0 wk
24 Apr
8 Jun
1 wk after