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Rel. frost
Last spring frost (0°C) 21 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 247 days 21 Mar – 23 Nov
Probability that frost is over

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