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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 220 days 18 Mar – 24 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)
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
Season too short
17 Jan – 14 Feb
6 Feb
8-12 wk
11 Apr
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
Greenhouse
14 – 21 Mar
9 Jun
3-4 wk
11 Apr
30 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
2 – 9 Apr
13 Jun
4-5 wk
7 May
11 Jul
7 wk after
28 Apr
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
19 – 26 Apr
10 May
3-4 wk
17 May
31 May
9 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
Greenhouse
18 – 25 Feb
30 May
3-4 wk
18 Mar
20 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Feb
10 Jul
3-4 wk
20 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
12 Jun
4-6 wk
23 Mar
10 Jul
1 wk after
23 Mar
30 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
Fleece
28 Mar – 4 Apr
14 Jun
3-4 wk
25 Apr
5 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Feb
25 Jun
3-4 wk
20 Mar
16 Jul
0 wk
31 Mar
6 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
Greenhouse
21 Jan – 4 Feb
9 May
6-8 wk
18 Mar
20 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
14 – 28 Mar
16 Jun
2-4 wk
11 Apr
30 Jun
3 wk after
13 Apr
20 Jun
4 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
Fleece
14 – 28 Mar
23 May
4-6 wk
25 Apr
20 Jun
5 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
21 Jan – 4 Feb
9 Jun
6-8 wk
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 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
9 – 23 Jan
11 May
8-10 wk
20 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
12 Dec – 9 Jan
12 Apr
10-14 wk
20 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
Fleece
28 Mar – 4 Apr
30 May
3-4 wk
25 Apr
20 Jun
5 wk after
Cornflower
Centaurea cyanus
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 wk before
Statice
Limonium sinuatum
14 – 28 Feb
18 Apr
8-10 wk
25 Apr
13 Jun
5 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
28 Feb – 14 Mar
2 May
6-8 wk
25 Apr
13 Jun
5 wk after
31 May
3 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
21 Feb – 7 Mar
3 May
6-8 wk
18 Apr
14 Jun
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
16 Feb – 16 Mar
17 May
4-8 wk
13 Apr
14 Jun
4 wk after
13 Apr
4 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
12 Feb – 12 Mar
10 Jun
8-12 wk
7 May
5 Aug
7 wk after
Creeping zinnia
Sanvitalia procumbens
28 Feb – 14 Mar
12 May
6-8 wk
25 Apr
23 Jun
5 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
14 – 28 Mar
23 Apr
4-6 wk
25 Apr
21 May
5 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Jan
26 Apr
8-10 wk
20 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
28 Feb – 14 Mar
22 Apr
6-8 wk
25 Apr
3 Jun
5 wk after
31 May
11 wk after
Purple-top vervain
Verbena bonariensis
26 Dec – 23 Jan
26 Apr
8-12 wk
20 Mar
21 Jun
0 wk
Cardoon
Cynara cardunculus
31 Jan – 28 Feb
27 Mar
8-12 wk
25 Apr
22 May
5 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
31 Jan – 28 Feb
15 Apr
8-12 wk
25 Apr
10 Jun
5 wk after
Globe amaranth
Gomphrena globosa
Fleece
28 Feb – 14 Mar
29 Apr
6-8 wk
25 Apr
10 Jun
5 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
26 Feb – 12 Mar
28 Apr
8-10 wk
7 May
23 Jun
7 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
Fleece
14 – 28 Mar
8 May
4-6 wk
25 Apr
5 Jun
5 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
31 Jan – 28 Feb
18 Apr
8-12 wk
25 Apr
13 Jun
5 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Jan – 6 Feb
10 May
6-8 wk
20 Mar
21 Jun
0 wk
28 Apr
11 Jun
6 wk after
Common zinnia
Zinnia elegans
14 – 28 Mar
23 May
4-6 wk
25 Apr
20 Jun
5 wk after
Common morning glory
Ipomoea purpurea
Fleece
21 Mar – 4 Apr
30 May
3-5 wk
25 Apr
20 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
14 – 28 Mar
17 May
4-6 wk
25 Apr
14 Jun
5 wk after
28 Apr
4 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
12 Feb – 12 Mar
15 May
8-12 wk
7 May
10 Jul
7 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
12 – 26 Feb
12 Mar
10-12 wk
7 May
21 May
7 wk after
Sunflower
Helianthus annuus
28 Mar – 4 Apr
20 Jun
3-4 wk
25 Apr
11 Jul
5 wk after
13 Apr
1 Jul
4 wk after
China aster
Callistephus chinensis
28 Feb – 14 Mar
9 Jun
6-8 wk
25 Apr
21 Jul
5 wk after
28 Apr
11 Jul
6 wk after
Annual phlox
Phlox drummondii
14 – 28 Feb
12 May
6-8 wk
11 Apr
23 Jun
3 wk after
28 Apr
13 Jun
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
28 Feb – 14 Mar
12 May
6-8 wk
25 Apr
23 Jun
5 wk after
Black-eyed Susan
Rudbeckia hirta
23 Jan – 6 Feb
30 May
6-8 wk
20 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
Fleece
14 Feb – 14 Mar
9 May
6-10 wk
25 Apr
20 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
18 Mar
21 Jul
0 wk
12 Mar
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
14 – 28 Feb
16 May
8-10 wk
25 Apr
11 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
21 Jan – 4 Feb
10 May
6-8 wk
18 Mar
21 Jun
0 wk
31 Mar
11 Jun
2 wk after