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