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Rel. frost
Last spring frost (0°C) 31 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 196 days 31 Mar – 13 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)
10 – 24 Feb
20 Jun
5-7 wk
31 Mar
25 Jul
0 wk
25 Mar
15 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
17 Feb – 3 Mar
2 Jul
4-6 wk
31 Mar
30 Jul
0 wk
25 Mar
20 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
24 Jan – 21 Feb
30 Mar
8-12 wk
18 Apr
25 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Feb
15 Jun
5-7 wk
31 Mar
20 Jul
0 wk
18 Mar
10 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
30 Mar – 6 Apr
24 May
3-4 wk
27 Apr
14 Jun
4 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 Apr
12 Jun
4-5 wk
11 May
10 Jul
6 wk after
11 May
30 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
23 – 30 Apr
7 May
3-4 wk
21 May
28 May
7 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Jan – 3 Feb
5 Apr
8-12 wk
31 Mar
31 May
0 wk
13 Apr
21 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
25 Mar
20 Jun
1 wk before
25 Mar
10 Jun
1 wk before
Maize
Zea mays
Fleece
21 – 28 Mar
14 May
3-4 wk
18 Apr
4 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
3 – 10 Mar
9 Jul
3-4 wk
31 Mar
30 Jul
0 wk
13 Apr
20 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
31 Mar
10 Jul
0 wk
18 Mar
30 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Feb
15 Jun
5-7 wk
31 Mar
20 Jul
0 wk
18 Mar
10 Jul
2 wk before
Potato
Solanum tuberosum
22 Feb – 8 Mar
8 Jun
4-6 wk
5 Apr
6 Jul
1 wk after
5 Apr
26 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Feb
25 Jun
5-7 wk
31 Mar
30 Jul
0 wk
25 Mar
20 Jul
1 wk before
Pumpkin
Cucurbita pepo
13 – 20 Apr
29 May
3-4 wk
11 May
19 Jun
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
3 – 10 Mar
21 Jun
3-4 wk
31 Mar
12 Jul
0 wk
13 Apr
2 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 Feb – 3 Mar
27 Jun
4-6 wk
31 Mar
25 Jul
0 wk
Lettuce
Lactuca sativa
3 – 10 Mar
14 Jul
3-4 wk
31 Mar
4 Aug
0 wk
25 Mar
25 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
17 Feb – 3 Mar
27 Jun
4-6 wk
31 Mar
25 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Feb – 4 Mar
6 Jun
2-4 wk
18 Mar
20 Jun
2 wk before
18 Mar
10 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
25 Mar
20 Jun
1 wk before
25 Mar
10 Jun
1 wk before
Spinach
Spinacia oleracea
3 – 10 Mar
29 Jul
3-4 wk
31 Mar
19 Aug
0 wk
11 Mar
9 Aug
3 wk before
Sweet potato
Ipomoea batatas
2 – 16 May
4-6 wk
13 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
21 Feb – 7 Mar
23 Apr
6-8 wk
18 Apr
4 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 Mar – 13 Apr
31 May
2-4 wk
27 Apr
14 Jun
4 wk after
11 May
4 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 Feb – 3 Mar
27 Jun
4-6 wk
31 Mar
25 Jul
0 wk
Garden pea
Pisum sativum
3 – 10 Mar
29 Jun
3-4 wk
31 Mar
20 Jul
0 wk
25 Mar
10 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
30 Mar – 13 Apr
7 May
4-6 wk
11 May
4 Jun
6 wk after
Lemon balm
Melissa officinalis
20 Jan – 3 Feb
25 May
8-10 wk
31 Mar
20 Jul
0 wk
26 Apr
10 Jul
4 wk after
Dill
Anethum graveolens
25 Mar
30 Jul
1 wk before
Wild chives
Allium schoenoprasum
3 – 17 Feb
8 Jun
6-8 wk
31 Mar
20 Jul
0 wk
25 Mar
10 Jul
1 wk before
Spearmint
Mentha spicata
6 Jan – 3 Feb
25 May
8-12 wk
31 Mar
20 Jul
0 wk
26 Apr
10 Jul
4 wk after
Coriander
Coriandrum sativum
31 Mar
19 Aug
0 wk
13 Apr
9 Aug
2 wk after
Garden sage
Salvia officinalis
20 Jan – 3 Feb
10 May
8-10 wk
31 Mar
5 Jul
0 wk
Common thyme
Thymus vulgaris
20 Jan – 3 Feb
15 May
8-10 wk
31 Mar
10 Jul
0 wk
Oregano
Origanum vulgare
3 – 17 Feb
29 May
6-8 wk
31 Mar
10 Jul
0 wk
26 Apr
30 Jun
4 wk after
Parsley
Petroselinum crispum
3 – 17 Feb
29 May
6-8 wk
31 Mar
10 Jul
0 wk
25 Mar
30 Jun
1 wk before
Rosemary
Salvia rosmarinus
23 Dec – 20 Jan
11 Apr
10-14 wk
31 Mar
20 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
13 – 20 Apr
14 May
3-4 wk
11 May
4 Jun
6 wk after
Cornflower
Centaurea cyanus
31 Mar
20 Jul
0 wk
25 Mar
10 Jul
1 wk before
Statice
Limonium sinuatum
16 Feb – 2 Mar
20 Apr
8-10 wk
27 Apr
15 Jun
4 wk after
Sweet William
Dianthus barbatus
3 – 17 Feb
6-8 wk
31 Mar
0 wk
5 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 Mar
4 May
6-8 wk
27 Apr
15 Jun
4 wk after
13 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
25 Feb – 11 Mar
7 May
6-8 wk
22 Apr
18 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
1 – 29 Mar
21 May
4-8 wk
26 Apr
18 Jun
4 wk after
26 Apr
8 Jun
4 wk after
Foxglove
Digitalis purpurea
20 Jan – 3 Feb
8-10 wk
31 Mar
0 wk
13 Apr
2 wk after
Busy lizzie
Impatiens walleriana
16 Feb – 16 Mar
7 Jun
8-12 wk
11 May
2 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 Mar
14 May
6-8 wk
27 Apr
25 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
16 – 30 Mar
20 Apr
4-6 wk
27 Apr
18 May
4 wk after
Chinese lantern
Physalis alkekengi
20 Jan – 3 Feb
25 Apr
8-10 wk
31 Mar
20 Jun
0 wk
Love in a mist
Nigella damascena
31 Mar
5 Jul
0 wk
25 Mar
25 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
2 – 16 Mar
24 Apr
6-8 wk
27 Apr
5 Jun
4 wk after
13 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
6 Jan – 3 Feb
25 Apr
8-12 wk
31 Mar
20 Jun
0 wk
Cardoon
Cynara cardunculus
2 Feb – 2 Mar
26 Mar
8-12 wk
27 Apr
21 May
4 wk after
Regal-foxtail
Ptilotus nobilis
16 Feb – 16 Mar
30 Mar
8-12 wk
11 May
25 May
6 wk after
Globe amaranth
Gomphrena globosa
16 – 30 Mar
13 Apr
6-8 wk
11 May
25 May
6 wk after
Corn poppy
Papaver rhoeas
31 Mar
20 Jul
0 wk
25 Mar
10 Jul
1 wk before
Snapdragon
Antirrhinum majus
6 Jan – 3 Feb
15 May
8-12 wk
31 Mar
10 Jul
0 wk
5 Apr
30 Jun
1 wk after
Flossflower
Ageratum houstonianum
2 – 16 Mar
30 Apr
8-10 wk
11 May
25 Jun
6 wk after
Sweet pea
Lathyrus odoratus
3 – 24 Feb
5 Jun
5-8 wk
31 Mar
10 Jul
0 wk
Stock
Matthiola incana
3 – 17 Feb
8 Jun
6-8 wk
31 Mar
20 Jul
0 wk
13 Apr
10 Jul
2 wk after
Wormwood
Artemisia absinthium
3 – 17 Feb
9 May
6-8 wk
31 Mar
20 Jun
0 wk
13 Apr
10 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
30 Mar – 13 Apr
22 Apr
4-6 wk
11 May
20 May
6 wk after
Garden pansy
Viola × wittrockiana
20 Jan – 3 Feb
25 May
8-10 wk
31 Mar
20 Jul
0 wk
5 Apr
10 Jul
1 wk after
Petunia
Petunia
2 Feb – 2 Mar
20 Apr
8-12 wk
27 Apr
15 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
3 – 17 Feb
9 May
6-8 wk
31 Mar
20 Jun
0 wk
11 May
10 Jun
6 wk after
Common zinnia
Zinnia elegans
16 – 30 Mar
20 May
4-6 wk
27 Apr
17 Jun
4 wk after
Common morning glory
Ipomoea purpurea
6 – 20 Apr
14 May
3-5 wk
11 May
4 Jun
6 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 Mar
21 May
4-6 wk
27 Apr
18 Jun
4 wk after
11 May
8 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
6 Mar – 3 Apr
29 Apr
8-12 wk
29 May
24 Jun
8 wk after
Bee balm
Monarda didyma
6 Jan – 3 Feb
25 Apr
8-12 wk
31 Mar
20 Jun
0 wk
26 Apr
10 Jun
4 wk after
Yarrow
Achillea millefolium
3 – 17 Feb
9 Apr
6-8 wk
31 Mar
21 May
0 wk
13 Apr
11 May
2 wk after
Safflower
Carthamus tinctorius
31 Mar
20 Jun
0 wk
25 Mar
10 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
3 – 17 Feb
29 May
6-8 wk
31 Mar
10 Jul
0 wk
13 Feb
30 Jun
7 wk before
Bishop's flower
Ammi majus
17 Feb – 3 Mar
12 Jun
4-6 wk
31 Mar
10 Jul
0 wk
13 Apr
30 Jun
2 wk after
Drumsticks
Pycnosorus globosus
16 Feb – 2 Mar
9 Mar
10-12 wk
11 May
18 May
6 wk after
Sunflower
Helianthus annuus
30 Mar – 6 Apr
19 Jun
3-4 wk
27 Apr
10 Jul
4 wk after
26 Apr
30 Jun
4 wk after
China aster
Callistephus chinensis
2 – 16 Mar
8 Jun
6-8 wk
27 Apr
20 Jul
4 wk after
11 May
10 Jul
6 wk after
Annual phlox
Phlox drummondii
21 Feb – 7 Mar
14 May
6-8 wk
18 Apr
25 Jun
3 wk after
11 May
15 Jun
6 wk after
Hollyhock
Alcea rosea
3 – 17 Feb
6-8 wk
31 Mar
0 wk
13 Apr
2 wk after
Alpine delphinium
Delphinium elatum
6 Jan – 3 Feb
25 Apr
8-12 wk
31 Mar
20 Jun
0 wk
26 Apr
10 Jun
4 wk after
African marigold
Tagetes erecta
2 – 16 Mar
14 May
6-8 wk
27 Apr
25 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
3 – 17 Feb
29 May
6-8 wk
31 Mar
10 Jul
0 wk
11 May
30 Jun
6 wk after
Wood sage
Salvia nemorosa
20 Jan – 3 Feb
15 Apr
8-10 wk
31 Mar
10 Jun
0 wk
26 Apr
31 May
4 wk after
Black-eyed susan vine
Thunbergia alata
2 – 30 Mar
23 Apr
6-10 wk
11 May
4 Jun
6 wk after
California goldenpoppy
Eschscholzia californica
31 Mar
20 Jul
0 wk
25 Mar
10 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
16 Feb – 2 Mar
15 May
8-10 wk
27 Apr
10 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
3 – 17 Feb
9 May
6-8 wk
31 Mar
20 Jun
0 wk
13 Apr
10 Jun
2 wk after