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Rel. frost
Last spring frost (0°C) 21 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 224 days 21 Mar – 31 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)
31 Jan – 14 Feb
19 Jun
5-7 wk
21 Mar
24 Jul
0 wk
14 Mar
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
7 – 21 Feb
1 Jul
4-6 wk
21 Mar
29 Jul
0 wk
14 Mar
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
15 Jan – 12 Feb
26 Mar
8-12 wk
9 Apr
21 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
31 Jan – 14 Feb
14 Jun
5-7 wk
21 Mar
19 Jul
0 wk
9 Mar
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
29 Mar – 5 Apr
20 May
3-4 wk
26 Apr
10 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
22 – 29 Mar
11 Jun
4-5 wk
26 Apr
9 Jul
5 wk after
26 Apr
29 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
19 – 26 Apr
12 May
3-4 wk
17 May
2 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Dec – 24 Jan
3 Apr
8-12 wk
21 Mar
29 May
0 wk
31 Mar
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 Mar
18 Jun
1 wk before
14 Mar
8 Jun
1 wk before
Maize
Zea mays
12 – 19 Mar
10 May
3-4 wk
9 Apr
31 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Feb – 6 Mar
8 Jul
3-4 wk
27 Mar
29 Jul
1 wk after
31 Mar
19 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 Mar
9 Jul
0 wk
9 Mar
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
31 Jan – 14 Feb
14 Jun
5-7 wk
21 Mar
19 Jul
0 wk
9 Mar
9 Jul
2 wk before
Potato
Solanum tuberosum
12 – 26 Feb
7 Jun
4-6 wk
26 Mar
5 Jul
1 wk after
26 Mar
25 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
31 Jan – 14 Feb
24 Jun
5-7 wk
21 Mar
29 Jul
0 wk
14 Mar
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
29 Mar – 5 Apr
16 Jun
3-4 wk
26 Apr
7 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
27 Feb – 6 Mar
15 Jun
3-4 wk
27 Mar
6 Jul
1 wk after
31 Mar
26 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
7 – 21 Feb
26 Jun
4-6 wk
21 Mar
24 Jul
0 wk
Lettuce
Lactuca sativa
21 – 28 Feb
13 Jul
3-4 wk
21 Mar
3 Aug
0 wk
14 Mar
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
7 – 21 Feb
26 Jun
4-6 wk
21 Mar
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
9 – 23 Feb
5 Jun
2-4 wk
9 Mar
19 Jun
2 wk before
9 Mar
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
14 Mar
18 Jun
1 wk before
14 Mar
8 Jun
1 wk before
Spinach
Spinacia oleracea
21 – 28 Feb
28 Jul
3-4 wk
21 Mar
18 Aug
0 wk
3 Mar
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
17 Apr – 1 May
4-6 wk
29 May
10 wk after
Garden tomato
Solanum lycopersicum
12 – 26 Feb
19 Apr
6-8 wk
9 Apr
31 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
12 – 26 Mar
18 Jun
2-4 wk
9 Apr
2 Jul
3 wk after
26 Apr
22 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
7 – 21 Feb
26 Jun
4-6 wk
21 Mar
24 Jul
0 wk
Garden pea
Pisum sativum
21 – 28 Feb
28 Jun
3-4 wk
21 Mar
19 Jul
0 wk
14 Mar
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
15 – 29 Mar
25 May
4-6 wk
26 Apr
22 Jun
5 wk after
Lemon balm
Melissa officinalis
10 – 24 Jan
24 May
8-10 wk
21 Mar
19 Jul
0 wk
11 Apr
9 Jul
3 wk after
Dill
Anethum graveolens
14 Mar
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
24 Jan – 7 Feb
7 Jun
6-8 wk
21 Mar
19 Jul
0 wk
20 Feb
9 Jul
4 wk before
Spearmint
Mentha spicata
27 Dec – 24 Jan
24 May
8-12 wk
21 Mar
19 Jul
0 wk
11 Apr
9 Jul
3 wk after
Coriander
Coriandrum sativum
21 Mar
18 Aug
0 wk
31 Mar
8 Aug
1 wk after
Garden sage
Salvia officinalis
16 – 30 Jan
9 May
8-10 wk
27 Mar
4 Jul
1 wk after
Common thyme
Thymus vulgaris
10 – 24 Jan
14 May
8-10 wk
21 Mar
9 Jul
0 wk
Oregano
Origanum vulgare
24 Jan – 7 Feb
28 May
6-8 wk
21 Mar
9 Jul
0 wk
11 Apr
29 Jun
3 wk after
Parsley
Petroselinum crispum
24 Jan – 7 Feb
28 May
6-8 wk
21 Mar
9 Jul
0 wk
14 Mar
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
19 Dec – 16 Jan
10 Apr
10-14 wk
27 Mar
19 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
29 Mar – 5 Apr
1 Jun
3-4 wk
26 Apr
22 Jun
5 wk after
Cornflower
Centaurea cyanus
21 Mar
19 Jul
0 wk
14 Mar
9 Jul
1 wk before
Statice
Limonium sinuatum
29 Jan – 12 Feb
30 Apr
8-10 wk
9 Apr
25 Jun
3 wk after
Sweet William
Dianthus barbatus
24 Jan – 7 Feb
6-8 wk
21 Mar
0 wk
26 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
12 – 26 Feb
14 May
6-8 wk
9 Apr
25 Jun
3 wk after
29 May
15 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
7 – 21 Feb
18 May
6-8 wk
4 Apr
29 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
14 Feb – 14 Mar
1 Jun
4-8 wk
11 Apr
29 Jun
3 wk after
11 Apr
19 Jun
3 wk after
Foxglove
Digitalis purpurea
10 – 24 Jan
8-10 wk
21 Mar
0 wk
31 Mar
1 wk after
Busy lizzie
Impatiens walleriana
1 Feb – 1 Mar
18 Jun
8-12 wk
26 Apr
13 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 Feb
24 May
6-8 wk
9 Apr
5 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
15 – 29 Mar
25 Apr
4-6 wk
26 Apr
23 May
5 wk after
Chinese lantern
Physalis alkekengi
16 – 30 Jan
24 Apr
8-10 wk
27 Mar
19 Jun
1 wk after
Love in a mist
Nigella damascena
21 Mar
4 Jul
0 wk
14 Mar
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
12 – 26 Feb
4 May
6-8 wk
9 Apr
15 Jun
3 wk after
29 May
5 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Jan
24 Apr
8-12 wk
27 Mar
19 Jun
1 wk after
Cardoon
Cynara cardunculus
15 Jan – 12 Feb
25 Mar
8-12 wk
9 Apr
20 May
3 wk after
Regal-foxtail
Ptilotus nobilis
1 Feb – 1 Mar
17 Apr
8-12 wk
26 Apr
12 Jun
5 wk after
Globe amaranth
Gomphrena globosa
1 – 15 Mar
1 May
6-8 wk
26 Apr
12 Jun
5 wk after
Corn poppy
Papaver rhoeas
21 Mar
19 Jul
0 wk
14 Mar
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
27 Dec – 24 Jan
14 May
8-12 wk
21 Mar
9 Jul
0 wk
26 Mar
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
15 Feb – 1 Mar
10 May
8-10 wk
26 Apr
5 Jul
5 wk after
Sweet pea
Lathyrus odoratus
24 Jan – 14 Feb
4 Jun
5-8 wk
21 Mar
9 Jul
0 wk
Stock
Matthiola incana
24 Jan – 7 Feb
7 Jun
6-8 wk
21 Mar
19 Jul
0 wk
31 Mar
9 Jul
1 wk after
Wormwood
Artemisia absinthium
24 Jan – 7 Feb
8 May
6-8 wk
21 Mar
19 Jun
0 wk
31 Mar
9 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
15 – 29 Mar
10 May
4-6 wk
26 Apr
7 Jun
5 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Jan
24 May
8-10 wk
21 Mar
19 Jul
0 wk
26 Mar
9 Jul
1 wk after
Petunia
Petunia
15 Jan – 12 Feb
30 Apr
8-12 wk
9 Apr
25 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Jan – 13 Feb
8 May
6-8 wk
27 Mar
19 Jun
1 wk after
26 Apr
9 Jun
5 wk after
Common zinnia
Zinnia elegans
26 Feb – 12 Mar
31 May
4-6 wk
9 Apr
28 Jun
3 wk after
Common morning glory
Ipomoea purpurea
22 Mar – 5 Apr
1 Jun
3-5 wk
26 Apr
22 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
26 Feb – 12 Mar
1 Jun
4-6 wk
9 Apr
29 Jun
3 wk after
26 Apr
19 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
13 Feb – 13 Mar
17 May
8-12 wk
8 May
12 Jul
7 wk after
Bee balm
Monarda didyma
27 Dec – 24 Jan
24 Apr
8-12 wk
21 Mar
19 Jun
0 wk
11 Apr
9 Jun
3 wk after
Yarrow
Achillea millefolium
24 Jan – 7 Feb
8 Apr
6-8 wk
21 Mar
20 May
0 wk
31 Mar
10 May
1 wk after
Safflower
Carthamus tinctorius
21 Mar
19 Jun
0 wk
14 Mar
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
24 Jan – 7 Feb
28 May
6-8 wk
21 Mar
9 Jul
0 wk
10 Feb
29 Jun
6 wk before
Bishop's flower
Ammi majus
7 – 21 Feb
11 Jun
4-6 wk
21 Mar
9 Jul
0 wk
31 Mar
29 Jun
1 wk after
Drumsticks
Pycnosorus globosus
1 – 15 Feb
20 Mar
10-12 wk
26 Apr
29 May
5 wk after
Sunflower
Helianthus annuus
12 – 19 Mar
18 Jun
3-4 wk
9 Apr
9 Jul
3 wk after
11 Apr
29 Jun
3 wk after
China aster
Callistephus chinensis
12 – 26 Feb
7 Jun
6-8 wk
9 Apr
19 Jul
3 wk after
26 Apr
9 Jul
5 wk after
Annual phlox
Phlox drummondii
4 – 18 Feb
24 May
6-8 wk
1 Apr
5 Jul
2 wk after
26 Apr
25 Jun
5 wk after
Hollyhock
Alcea rosea
24 Jan – 7 Feb
6-8 wk
21 Mar
0 wk
31 Mar
1 wk after
Alpine delphinium
Delphinium elatum
27 Dec – 24 Jan
24 Apr
8-12 wk
21 Mar
19 Jun
0 wk
11 Apr
9 Jun
3 wk after
African marigold
Tagetes erecta
12 – 26 Feb
24 May
6-8 wk
9 Apr
5 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
30 Jan – 13 Feb
28 May
6-8 wk
27 Mar
9 Jul
1 wk after
26 Apr
29 Jun
5 wk after
Wood sage
Salvia nemorosa
10 – 24 Jan
14 Apr
8-10 wk
21 Mar
9 Jun
0 wk
11 Apr
30 May
3 wk after
Black-eyed susan vine
Thunbergia alata
15 Feb – 15 Mar
11 May
6-10 wk
26 Apr
22 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
21 Mar
19 Jul
0 wk
14 Mar
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
29 Jan – 12 Feb
14 May
8-10 wk
9 Apr
9 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
24 Jan – 7 Feb
8 May
6-8 wk
21 Mar
19 Jun
0 wk
9 Mar
9 Jun
2 wk before