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Rel. frost
Last spring frost (0°C) 18 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 233 days 18 Mar – 6 Nov
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)
28 Jan – 11 Feb
21 Jun
5-7 wk
18 Mar
26 Jul
0 wk
12 Mar
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Feb
3 Jul
4-6 wk
18 Mar
31 Jul
0 wk
12 Mar
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
11 Jan – 8 Feb
17 Apr
8-12 wk
5 Apr
12 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Jan – 11 Feb
16 Jun
5-7 wk
18 Mar
21 Jul
0 wk
5 Mar
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
17 – 24 Mar
11 Jun
3-4 wk
14 Apr
2 Jul
4 wk after
Florence Fennel
Foeniculum vulgare
24 – 31 Mar
13 Jun
4-5 wk
28 Apr
11 Jul
6 wk after
28 Apr
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Fleece
26 Apr – 3 May
12 May
3-4 wk
24 May
2 Jun
10 wk after
Onion
Allium cepa (Cepa-gruppen)
24 Dec – 21 Jan
6 Apr
8-12 wk
18 Mar
1 Jun
0 wk
31 Mar
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
12 Mar
21 Jun
1 wk before
12 Mar
11 Jun
1 wk before
Maize
Zea mays
Fleece
8 – 15 Mar
1 Jun
3-4 wk
5 Apr
22 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
18 – 25 Feb
10 Jul
3-4 wk
18 Mar
31 Jul
0 wk
31 Mar
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 Mar
11 Jul
0 wk
5 Mar
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Jan – 11 Feb
16 Jun
5-7 wk
18 Mar
21 Jul
0 wk
5 Mar
11 Jul
2 wk before
Potato
Solanum tuberosum
9 – 23 Feb
10 Jun
4-6 wk
23 Mar
8 Jul
1 wk after
23 Mar
28 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Jan – 11 Feb
26 Jun
5-7 wk
18 Mar
31 Jul
0 wk
12 Mar
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
31 Mar – 7 Apr
16 Jun
3-4 wk
28 Apr
7 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
18 – 25 Feb
24 Jun
3-4 wk
18 Mar
15 Jul
0 wk
31 Mar
5 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Feb
28 Jun
4-6 wk
18 Mar
26 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Feb
15 Jul
3-4 wk
18 Mar
5 Aug
0 wk
12 Mar
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Feb
28 Jun
4-6 wk
18 Mar
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Feb
7 Jun
2-4 wk
5 Mar
21 Jun
2 wk before
5 Mar
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
12 Mar
21 Jun
1 wk before
12 Mar
11 Jun
1 wk before
Spinach
Spinacia oleracea
18 – 25 Feb
30 Jul
3-4 wk
18 Mar
20 Aug
0 wk
26 Feb
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
19 Apr – 3 May
4-6 wk
31 May
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
8 – 22 Feb
11 May
6-8 wk
5 Apr
22 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
17 – 31 Mar
18 Jun
2-4 wk
14 Apr
2 Jul
4 wk after
28 Apr
22 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Feb
28 Jun
4-6 wk
18 Mar
26 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Feb
30 Jun
3-4 wk
18 Mar
21 Jul
0 wk
12 Mar
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
17 – 31 Mar
25 May
4-6 wk
28 Apr
22 Jun
6 wk after
Lemon balm
Melissa officinalis
7 – 21 Jan
26 May
8-10 wk
18 Mar
21 Jul
0 wk
13 Apr
11 Jul
4 wk after
Dill
Anethum graveolens
12 Mar
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
21 Jan – 4 Feb
9 Jun
6-8 wk
18 Mar
21 Jul
0 wk
12 Feb
11 Jul
5 wk before
Spearmint
Mentha spicata
24 Dec – 21 Jan
26 May
8-12 wk
18 Mar
21 Jul
0 wk
13 Apr
11 Jul
4 wk after
Coriander
Coriandrum sativum
18 Mar
20 Aug
0 wk
31 Mar
10 Aug
2 wk after
Garden sage
Salvia officinalis
7 – 21 Jan
11 May
8-10 wk
18 Mar
6 Jul
0 wk
Common thyme
Thymus vulgaris
7 – 21 Jan
16 May
8-10 wk
18 Mar
11 Jul
0 wk
Oregano
Origanum vulgare
21 Jan – 4 Feb
30 May
6-8 wk
18 Mar
11 Jul
0 wk
13 Apr
1 Jul
4 wk after
Parsley
Petroselinum crispum
21 Jan – 4 Feb
30 May
6-8 wk
18 Mar
11 Jul
0 wk
12 Mar
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
10 Dec – 7 Jan
12 Apr
10-14 wk
18 Mar
21 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
31 Mar – 7 Apr
1 Jun
3-4 wk
28 Apr
22 Jun
6 wk after
Cornflower
Centaurea cyanus
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 wk before
Statice
Limonium sinuatum
3 – 17 Feb
8 May
8-10 wk
14 Apr
3 Jul
4 wk after
Sweet William
Dianthus barbatus
21 Jan – 4 Feb
6-8 wk
18 Mar
0 wk
23 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
17 Feb – 3 Mar
22 May
6-8 wk
14 Apr
3 Jul
4 wk after
31 May
23 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Feb
25 May
6-8 wk
9 Apr
6 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
16 Feb – 16 Mar
8 Jun
4-8 wk
13 Apr
6 Jul
4 wk after
13 Apr
26 Jun
4 wk after
Foxglove
Digitalis purpurea
7 – 21 Jan
8-10 wk
18 Mar
0 wk
31 Mar
2 wk after
Busy lizzie
Impatiens walleriana
3 Feb – 3 Mar
29 Jun
8-12 wk
28 Apr
24 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
17 Feb – 3 Mar
1 Jun
6-8 wk
14 Apr
13 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Fleece
17 – 31 Mar
25 Apr
4-6 wk
28 Apr
23 May
6 wk after
Chinese lantern
Physalis alkekengi
7 – 21 Jan
26 Apr
8-10 wk
18 Mar
21 Jun
0 wk
Love in a mist
Nigella damascena
18 Mar
6 Jul
0 wk
12 Mar
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
17 Feb – 3 Mar
12 May
6-8 wk
14 Apr
23 Jun
4 wk after
31 May
13 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
24 Dec – 21 Jan
26 Apr
8-12 wk
18 Mar
21 Jun
0 wk
Cardoon
Cynara cardunculus
20 Jan – 17 Feb
27 Mar
8-12 wk
14 Apr
22 May
4 wk after
Regal-foxtail
Ptilotus nobilis
3 Feb – 3 Mar
17 Apr
8-12 wk
28 Apr
12 Jun
6 wk after
Globe amaranth
Gomphrena globosa
3 – 17 Mar
1 May
6-8 wk
28 Apr
12 Jun
6 wk after
Corn poppy
Papaver rhoeas
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
24 Dec – 21 Jan
16 May
8-12 wk
18 Mar
11 Jul
0 wk
23 Mar
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
17 Feb – 3 Mar
18 May
8-10 wk
28 Apr
13 Jul
6 wk after
Sweet pea
Lathyrus odoratus
21 Jan – 11 Feb
6 Jun
5-8 wk
18 Mar
11 Jul
0 wk
Stock
Matthiola incana
21 Jan – 4 Feb
9 Jun
6-8 wk
18 Mar
21 Jul
0 wk
31 Mar
11 Jul
2 wk after
Wormwood
Artemisia absinthium
21 Jan – 4 Feb
10 May
6-8 wk
18 Mar
21 Jun
0 wk
31 Mar
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
17 – 31 Mar
10 May
4-6 wk
28 Apr
7 Jun
6 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Jan
26 May
8-10 wk
18 Mar
21 Jul
0 wk
23 Mar
11 Jul
1 wk after
Petunia
Petunia
20 Jan – 17 Feb
8 May
8-12 wk
14 Apr
3 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
21 Jan – 4 Feb
10 May
6-8 wk
18 Mar
21 Jun
0 wk
28 Apr
11 Jun
6 wk after
Common zinnia
Zinnia elegans
3 – 17 Mar
11 Jun
4-6 wk
14 Apr
9 Jul
4 wk after
Common morning glory
Ipomoea purpurea
24 Mar – 7 Apr
1 Jun
3-5 wk
28 Apr
22 Jun
6 wk after
Garden cosmos
Cosmos bipinnatus
3 – 17 Mar
8 Jun
4-6 wk
14 Apr
6 Jul
4 wk after
28 Apr
26 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
21 Feb – 21 Mar
17 May
8-12 wk
16 May
12 Jul
8 wk after
Bee balm
Monarda didyma
24 Dec – 21 Jan
26 Apr
8-12 wk
18 Mar
21 Jun
0 wk
13 Apr
11 Jun
4 wk after
Yarrow
Achillea millefolium
21 Jan – 4 Feb
10 Apr
6-8 wk
18 Mar
22 May
0 wk
31 Mar
12 May
2 wk after
Safflower
Carthamus tinctorius
18 Mar
21 Jun
0 wk
12 Mar
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
21 Jan – 4 Feb
30 May
6-8 wk
18 Mar
11 Jul
0 wk
31 Jan
1 Jul
7 wk before
Bishop's flower
Ammi majus
4 – 18 Feb
13 Jun
4-6 wk
18 Mar
11 Jul
0 wk
31 Mar
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
3 – 17 Feb
31 Mar
10-12 wk
28 Apr
9 Jun
6 wk after
Sunflower
Helianthus annuus
17 – 24 Mar
20 Jun
3-4 wk
14 Apr
11 Jul
4 wk after
13 Apr
1 Jul
4 wk after
China aster
Callistephus chinensis
17 Feb – 3 Mar
9 Jun
6-8 wk
14 Apr
21 Jul
4 wk after
28 Apr
11 Jul
6 wk after
Annual phlox
Phlox drummondii
8 – 22 Feb
1 Jun
6-8 wk
5 Apr
13 Jul
3 wk after
28 Apr
3 Jul
6 wk after
Hollyhock
Alcea rosea
21 Jan – 4 Feb
6-8 wk
18 Mar
0 wk
31 Mar
2 wk after
Alpine delphinium
Delphinium elatum
24 Dec – 21 Jan
26 Apr
8-12 wk
18 Mar
21 Jun
0 wk
13 Apr
11 Jun
4 wk after
African marigold
Tagetes erecta
17 Feb – 3 Mar
1 Jun
6-8 wk
14 Apr
13 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
21 Jan – 4 Feb
30 May
6-8 wk
18 Mar
11 Jul
0 wk
28 Apr
1 Jul
6 wk after
Wood sage
Salvia nemorosa
7 – 21 Jan
16 Apr
8-10 wk
18 Mar
11 Jun
0 wk
13 Apr
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
17 Feb – 17 Mar
11 May
6-10 wk
28 Apr
22 Jun
6 wk after
California goldenpoppy
Eschscholzia californica
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
3 – 17 Feb
16 May
8-10 wk
14 Apr
11 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
21 Jan – 4 Feb
10 May
6-8 wk
18 Mar
21 Jun
0 wk
5 Mar
11 Jun
2 wk before