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Rel. frost
Last spring frost (0°C) 23 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 217 days 23 Mar – 26 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)
2 – 16 Feb
18 Jun
5-7 wk
23 Mar
23 Jul
0 wk
16 Mar
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Feb
30 Jun
4-6 wk
23 Mar
28 Jul
0 wk
16 Mar
18 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
17 Jan – 14 Feb
6 Mar
8-12 wk
11 Apr
1 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Feb
13 Jun
5-7 wk
23 Mar
18 Jul
0 wk
11 Mar
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
31 Mar – 7 Apr
30 Apr
3-4 wk
28 Apr
21 May
5 wk after
Florence Fennel
Foeniculum vulgare
24 – 31 Mar
10 Jun
4-5 wk
28 Apr
8 Jul
5 wk after
28 Apr
28 Jun
5 wk after
Butter bean
Phaseolus lunatus
Greenhouse
7 – 14 Apr
17 May
3-4 wk
5 May
7 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
29 Dec – 26 Jan
30 Mar
8-12 wk
23 Mar
25 May
0 wk
2 Apr
15 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 Mar
14 Jun
1 wk before
16 Mar
4 Jun
1 wk before
Maize
Zea mays
14 – 21 Mar
20 Apr
3-4 wk
11 Apr
11 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
1 – 8 Mar
7 Jul
3-4 wk
29 Mar
28 Jul
1 wk after
2 Apr
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 Mar
8 Jul
0 wk
11 Mar
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Feb
13 Jun
5-7 wk
23 Mar
18 Jul
0 wk
11 Mar
8 Jul
2 wk before
Potato
Solanum tuberosum
14 – 28 Feb
28 May
4-6 wk
28 Mar
25 Jun
1 wk after
28 Mar
15 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Feb
23 Jun
5-7 wk
23 Mar
28 Jul
0 wk
16 Mar
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
31 Mar – 7 Apr
2 Jun
3-4 wk
28 Apr
23 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
1 – 8 Mar
9 Jun
3-4 wk
29 Mar
30 Jun
1 wk after
2 Apr
20 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Feb
25 Jun
4-6 wk
23 Mar
23 Jul
0 wk
Lettuce
Lactuca sativa
23 Feb – 2 Mar
12 Jul
3-4 wk
23 Mar
2 Aug
0 wk
16 Mar
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Feb
25 Jun
4-6 wk
23 Mar
23 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Feb
3 Jun
2-4 wk
11 Mar
17 Jun
2 wk before
11 Mar
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 Mar
14 Jun
1 wk before
16 Mar
4 Jun
1 wk before
Spinach
Spinacia oleracea
23 Feb – 2 Mar
27 Jul
3-4 wk
23 Mar
17 Aug
0 wk
5 Mar
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
19 Apr – 3 May
4-6 wk
31 May
10 wk after
Garden tomato
Solanum lycopersicum
14 – 28 Feb
30 Mar
6-8 wk
11 Apr
11 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
14 – 28 Mar
4 Jun
2-4 wk
11 Apr
18 Jun
3 wk after
28 Apr
8 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Feb
25 Jun
4-6 wk
23 Mar
23 Jul
0 wk
Garden pea
Pisum sativum
23 Feb – 2 Mar
27 Jun
3-4 wk
23 Mar
18 Jul
0 wk
16 Mar
8 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
11 May
4-6 wk
28 Apr
8 Jun
5 wk after
Lemon balm
Melissa officinalis
12 – 26 Jan
23 May
8-10 wk
23 Mar
18 Jul
0 wk
13 Apr
8 Jul
3 wk after
Dill
Anethum graveolens
16 Mar
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
26 Jan – 9 Feb
6 Jun
6-8 wk
23 Mar
18 Jul
0 wk
16 Mar
8 Jul
1 wk before
Spearmint
Mentha spicata
29 Dec – 26 Jan
23 May
8-12 wk
23 Mar
18 Jul
0 wk
13 Apr
8 Jul
3 wk after
Coriander
Coriandrum sativum
23 Mar
17 Aug
0 wk
2 Apr
7 Aug
1 wk after
Garden sage
Salvia officinalis
18 Jan – 1 Feb
8 May
8-10 wk
29 Mar
3 Jul
1 wk after
Common thyme
Thymus vulgaris
12 – 26 Jan
13 May
8-10 wk
23 Mar
8 Jul
0 wk
Oregano
Origanum vulgare
26 Jan – 9 Feb
27 May
6-8 wk
23 Mar
8 Jul
0 wk
13 Apr
28 Jun
3 wk after
Parsley
Petroselinum crispum
26 Jan – 9 Feb
27 May
6-8 wk
23 Mar
8 Jul
0 wk
16 Mar
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
21 Dec – 18 Jan
9 Apr
10-14 wk
29 Mar
18 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
31 Mar – 7 Apr
18 May
3-4 wk
28 Apr
8 Jun
5 wk after
Cornflower
Centaurea cyanus
23 Mar
18 Jul
0 wk
16 Mar
8 Jul
1 wk before
Statice
Limonium sinuatum
31 Jan – 14 Feb
27 Apr
8-10 wk
11 Apr
22 Jun
3 wk after
Sweet William
Dianthus barbatus
26 Jan – 9 Feb
6-8 wk
23 Mar
0 wk
28 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
14 – 28 Feb
11 May
6-8 wk
11 Apr
22 Jun
3 wk after
31 May
12 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
9 – 23 Feb
15 May
6-8 wk
6 Apr
26 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
16 Feb – 16 Mar
29 May
4-8 wk
13 Apr
26 Jun
3 wk after
13 Apr
16 Jun
3 wk after
Foxglove
Digitalis purpurea
12 – 26 Jan
8-10 wk
23 Mar
0 wk
2 Apr
1 wk after
Busy lizzie
Impatiens walleriana
3 Feb – 3 Mar
17 Jun
8-12 wk
28 Apr
12 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
14 – 28 Feb
21 May
6-8 wk
11 Apr
2 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
17 – 31 Mar
11 Apr
4-6 wk
28 Apr
9 May
5 wk after
Chinese lantern
Physalis alkekengi
18 Jan – 1 Feb
23 Apr
8-10 wk
29 Mar
18 Jun
1 wk after
Love in a mist
Nigella damascena
23 Mar
3 Jul
0 wk
16 Mar
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
14 – 28 Feb
1 May
6-8 wk
11 Apr
12 Jun
3 wk after
31 May
2 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
4 Jan – 1 Feb
23 Apr
8-12 wk
29 Mar
18 Jun
1 wk after
Cardoon
Cynara cardunculus
17 Jan – 14 Feb
24 Mar
8-12 wk
11 Apr
19 May
3 wk after
Regal-foxtail
Ptilotus nobilis
3 Feb – 3 Mar
3 Apr
8-12 wk
28 Apr
29 May
5 wk after
Globe amaranth
Gomphrena globosa
3 – 17 Mar
17 Apr
6-8 wk
28 Apr
29 May
5 wk after
Corn poppy
Papaver rhoeas
23 Mar
18 Jul
0 wk
16 Mar
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
29 Dec – 26 Jan
13 May
8-12 wk
23 Mar
8 Jul
0 wk
28 Mar
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
17 Feb – 3 Mar
7 May
8-10 wk
28 Apr
2 Jul
5 wk after
Sweet pea
Lathyrus odoratus
26 Jan – 16 Feb
3 Jun
5-8 wk
23 Mar
8 Jul
0 wk
Stock
Matthiola incana
26 Jan – 9 Feb
6 Jun
6-8 wk
23 Mar
18 Jul
0 wk
2 Apr
8 Jul
1 wk after
Wormwood
Artemisia absinthium
26 Jan – 9 Feb
7 May
6-8 wk
23 Mar
18 Jun
0 wk
2 Apr
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
17 – 31 Mar
26 Apr
4-6 wk
28 Apr
24 May
5 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Jan
23 May
8-10 wk
23 Mar
18 Jul
0 wk
28 Mar
8 Jul
1 wk after
Petunia
Petunia
17 Jan – 14 Feb
27 Apr
8-12 wk
11 Apr
22 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Feb
7 May
6-8 wk
29 Mar
18 Jun
1 wk after
28 Apr
8 Jun
5 wk after
Common zinnia
Zinnia elegans
28 Feb – 14 Mar
30 May
4-6 wk
11 Apr
27 Jun
3 wk after
Common morning glory
Ipomoea purpurea
24 Mar – 7 Apr
18 May
3-5 wk
28 Apr
8 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
28 Feb – 14 Mar
29 May
4-6 wk
11 Apr
26 Jun
3 wk after
28 Apr
16 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
15 Feb – 15 Mar
3 May
8-12 wk
10 May
28 Jun
7 wk after
Bee balm
Monarda didyma
29 Dec – 26 Jan
23 Apr
8-12 wk
23 Mar
18 Jun
0 wk
13 Apr
8 Jun
3 wk after
Yarrow
Achillea millefolium
26 Jan – 9 Feb
7 Apr
6-8 wk
23 Mar
19 May
0 wk
2 Apr
9 May
1 wk after
Safflower
Carthamus tinctorius
23 Mar
18 Jun
0 wk
16 Mar
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
26 Jan – 9 Feb
27 May
6-8 wk
23 Mar
8 Jul
0 wk
12 Feb
28 Jun
6 wk before
Bishop's flower
Ammi majus
9 – 23 Feb
10 Jun
4-6 wk
23 Mar
8 Jul
0 wk
2 Apr
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
3 – 17 Feb
19 Mar
10-12 wk
28 Apr
28 May
5 wk after
Sunflower
Helianthus annuus
14 – 21 Mar
17 Jun
3-4 wk
11 Apr
8 Jul
3 wk after
13 Apr
28 Jun
3 wk after
China aster
Callistephus chinensis
14 – 28 Feb
6 Jun
6-8 wk
11 Apr
18 Jul
3 wk after
28 Apr
8 Jul
5 wk after
Annual phlox
Phlox drummondii
6 – 20 Feb
21 May
6-8 wk
3 Apr
2 Jul
2 wk after
28 Apr
22 Jun
5 wk after
Hollyhock
Alcea rosea
26 Jan – 9 Feb
6-8 wk
23 Mar
0 wk
2 Apr
1 wk after
Alpine delphinium
Delphinium elatum
29 Dec – 26 Jan
23 Apr
8-12 wk
23 Mar
18 Jun
0 wk
13 Apr
8 Jun
3 wk after
African marigold
Tagetes erecta
14 – 28 Feb
21 May
6-8 wk
11 Apr
2 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Feb
27 May
6-8 wk
29 Mar
8 Jul
1 wk after
28 Apr
28 Jun
5 wk after
Wood sage
Salvia nemorosa
12 – 26 Jan
13 Apr
8-10 wk
23 Mar
8 Jun
0 wk
13 Apr
29 May
3 wk after
Black-eyed susan vine
Thunbergia alata
17 Feb – 17 Mar
27 Apr
6-10 wk
28 Apr
8 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
23 Mar
18 Jul
0 wk
16 Mar
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
31 Jan – 14 Feb
13 May
8-10 wk
11 Apr
8 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
26 Jan – 9 Feb
7 May
6-8 wk
23 Mar
18 Jun
0 wk
2 Apr
8 Jun
1 wk after