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Method
Rel. frost
Last spring frost (0°C) 22 Mar Normal year · 20 years of data
Frost-free season 249 days 22 Mar – 26 Nov
Probability that frost is over

50% = 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)
1 – 15 Feb
22 Jun
5-7 wk
22 Mar
27 Jul
0 wk
16 Mar
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Feb
4 Jul
4-6 wk
22 Mar
1 Aug
0 wk
16 Mar
22 Jul
1 wk before
Chili pepper
Capsicum annuum
16 Feb – 16 Mar
28 Apr
8-12 wk
11 May
23 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
1 – 15 Feb
17 Jun
5-7 wk
22 Mar
22 Jul
0 wk
4 Feb
12 Jul
7 wk before
Garden cucumber
Cucumis sativus
13 – 20 Apr
6 Jul
3-4 wk
11 May
27 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 Apr
14 Jun
4-5 wk
11 May
12 Jul
7 wk after
2 May
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
1 – 8 Jun
6 Jun
3-4 wk
29 Jun
14 wk after
Onion
Allium cepa (Cepa-gruppen)
28 Dec – 25 Jan
7 Apr
8-12 wk
22 Mar
2 Jun
0 wk
4 Apr
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 Mar
22 Jun
1 wk before
16 Mar
12 Jun
1 wk before
Maize
Zea mays
1 – 8 Apr
26 Jun
3-4 wk
29 Apr
17 Jul
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Feb – 3 Mar
11 Jul
3-4 wk
24 Mar
1 Aug
0 wk
4 Apr
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 Mar
12 Jul
0 wk
9 Mar
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
1 – 15 Feb
17 Jun
5-7 wk
22 Mar
22 Jul
0 wk
4 Feb
12 Jul
7 wk before
Potato
Solanum tuberosum
13 – 27 Feb
14 Jun
4-6 wk
27 Mar
12 Jul
1 wk after
27 Mar
2 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Feb
27 Jun
5-7 wk
22 Mar
1 Aug
0 wk
16 Mar
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
13 – 20 Apr
16 Jul
3-4 wk
11 May
6 Aug
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Feb – 3 Mar
1 Jul
3-4 wk
24 Mar
22 Jul
0 wk
4 Apr
12 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
8 – 22 Feb
29 Jun
4-6 wk
22 Mar
27 Jul
0 wk
Lettuce
Lactuca sativa
22 Feb – 1 Mar
16 Jul
3-4 wk
22 Mar
6 Aug
0 wk
16 Mar
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
8 – 22 Feb
29 Jun
4-6 wk
22 Mar
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
9 – 23 Feb
8 Jun
2-4 wk
9 Mar
22 Jun
2 wk before
9 Mar
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 Mar
22 Jun
1 wk before
16 Mar
12 Jun
1 wk before
Spinach
Spinacia oleracea
22 Feb – 1 Mar
31 Jul
3-4 wk
22 Mar
21 Aug
0 wk
2 Mar
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
23 Apr – 7 May
4-6 wk
4 Jun
11 wk after
Garden tomato
Solanum lycopersicum
4 – 18 Mar
5 Jun
6-8 wk
29 Apr
17 Jul
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
1 – 15 Apr
18 Jul
2-4 wk
29 Apr
1 Aug
5 wk after
2 May
22 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
8 – 22 Feb
29 Jun
4-6 wk
22 Mar
27 Jul
0 wk
Garden pea
Pisum sativum
22 Feb – 1 Mar
1 Jul
3-4 wk
22 Mar
22 Jul
0 wk
16 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
30 Mar – 13 Apr
24 Jun
4-6 wk
11 May
22 Jul
7 wk after
Lemon balm
Melissa officinalis
11 – 25 Jan
27 May
8-10 wk
22 Mar
22 Jul
0 wk
17 Apr
12 Jul
4 wk after
Dill
Anethum graveolens
16 Mar
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
Season too short
25 Jan – 8 Feb
10 Jun
6-8 wk
22 Mar
22 Jul
0 wk
16 Feb
12 Jul
5 wk before
Spearmint
Mentha spicata
28 Dec – 25 Jan
27 May
8-12 wk
22 Mar
22 Jul
0 wk
17 Apr
12 Jul
4 wk after
Coriander
Coriandrum sativum
22 Mar
21 Aug
0 wk
4 Apr
11 Aug
2 wk after
Garden sage
Salvia officinalis
Season too short
11 – 25 Jan
12 May
8-10 wk
22 Mar
7 Jul
0 wk
Common thyme
Thymus vulgaris
Season too short
11 – 25 Jan
17 May
8-10 wk
22 Mar
12 Jul
0 wk
Oregano
Origanum vulgare
25 Jan – 8 Feb
31 May
6-8 wk
22 Mar
12 Jul
0 wk
17 Apr
2 Jul
4 wk after
Parsley
Petroselinum crispum
25 Jan – 8 Feb
31 May
6-8 wk
22 Mar
12 Jul
0 wk
16 Mar
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
16 Dec – 13 Jan
13 Apr
10-14 wk
24 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
13 – 20 Apr
1 Jul
3-4 wk
11 May
22 Jul
7 wk after
Cornflower
Centaurea cyanus
22 Mar
22 Jul
0 wk
16 Mar
12 Jul
1 wk before
Statice
Limonium sinuatum
18 Feb – 4 Mar
17 May
8-10 wk
29 Apr
12 Jul
5 wk after
Sweet William
Dianthus barbatus
25 Jan – 8 Feb
6-8 wk
22 Mar
0 wk
27 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
4 – 18 Mar
31 May
6-8 wk
29 Apr
12 Jul
5 wk after
4 Jun
2 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
25 Feb – 11 Mar
31 May
6-8 wk
22 Apr
12 Jul
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Feb – 20 Mar
14 Jun
4-8 wk
17 Apr
12 Jul
4 wk after
17 Apr
2 Jul
4 wk after
Foxglove
Digitalis purpurea
11 – 25 Jan
8-10 wk
22 Mar
0 wk
4 Apr
2 wk after
Busy lizzie
Impatiens walleriana
16 Feb – 16 Mar
12 Jul
8-12 wk
11 May
6 Sep
7 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Mar
10 Jun
6-8 wk
29 Apr
22 Jul
5 wk after
Hyacinth bean
Dolichos lablab
19 Apr – 3 May
20 May
4-6 wk
31 May
17 Jun
10 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Jan
27 Apr
8-10 wk
24 Mar
22 Jun
0 wk
Love in a mist
Nigella damascena
22 Mar
7 Jul
0 wk
16 Mar
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
4 – 18 Mar
21 May
6-8 wk
29 Apr
2 Jul
5 wk after
4 Jun
22 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
30 Dec – 27 Jan
27 Apr
8-12 wk
24 Mar
22 Jun
0 wk
Cardoon
Cynara cardunculus
4 Feb – 4 Mar
28 Mar
8-12 wk
29 Apr
23 May
5 wk after
Regal-foxtail
Ptilotus nobilis
16 Feb – 16 Mar
17 May
8-12 wk
11 May
12 Jul
7 wk after
Globe amaranth
Gomphrena globosa
16 – 30 Mar
31 May
6-8 wk
11 May
12 Jul
7 wk after
Corn poppy
Papaver rhoeas
22 Mar
22 Jul
0 wk
16 Mar
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
28 Dec – 25 Jan
17 May
8-12 wk
22 Mar
12 Jul
0 wk
27 Mar
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
2 – 16 Mar
27 May
8-10 wk
11 May
22 Jul
7 wk after
Sweet pea
Lathyrus odoratus
25 Jan – 15 Feb
7 Jun
5-8 wk
22 Mar
12 Jul
0 wk
Stock
Matthiola incana
25 Jan – 8 Feb
10 Jun
6-8 wk
22 Mar
22 Jul
0 wk
4 Apr
12 Jul
2 wk after
Wormwood
Artemisia absinthium
Season too short
25 Jan – 8 Feb
11 May
6-8 wk
22 Mar
22 Jun
0 wk
9 Mar
12 Jun
2 wk before
Mexican sunflower
Tithonia rotundifolia
30 Mar – 13 Apr
9 Jun
4-6 wk
11 May
7 Jul
7 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Jan
27 May
8-10 wk
22 Mar
22 Jul
0 wk
27 Mar
12 Jul
1 wk after
Petunia
Petunia
4 Feb – 4 Mar
17 May
8-12 wk
29 Apr
12 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Jan – 10 Feb
11 May
6-8 wk
24 Mar
22 Jun
0 wk
2 May
12 Jun
6 wk after
Common zinnia
Zinnia elegans
18 Mar – 1 Apr
24 Jun
4-6 wk
29 Apr
22 Jul
5 wk after
Common morning glory
Ipomoea purpurea
6 – 20 Apr
1 Jul
3-5 wk
11 May
22 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
18 Mar – 1 Apr
14 Jun
4-6 wk
29 Apr
12 Jul
5 wk after
2 May
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
8 Mar – 5 Apr
16 Jun
8-12 wk
31 May
11 Aug
10 wk after
Bee balm
Monarda didyma
28 Dec – 25 Jan
27 Apr
8-12 wk
22 Mar
22 Jun
0 wk
17 Apr
12 Jun
4 wk after
Yarrow
Achillea millefolium
Season too short
25 Jan – 8 Feb
11 Apr
6-8 wk
22 Mar
23 May
0 wk
9 Mar
13 May
2 wk before
Safflower
Carthamus tinctorius
22 Mar
22 Jun
0 wk
16 Mar
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
25 Jan – 8 Feb
31 May
6-8 wk
22 Mar
12 Jul
0 wk
4 Feb
2 Jul
7 wk before
Bishop's flower
Ammi majus
8 – 22 Feb
14 Jun
4-6 wk
22 Mar
12 Jul
0 wk
4 Apr
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
16 Feb – 2 Mar
13 Apr
10-12 wk
11 May
22 Jun
7 wk after
Sunflower
Helianthus annuus
1 – 8 Apr
21 Jun
3-4 wk
29 Apr
12 Jul
5 wk after
17 Apr
2 Jul
4 wk after
China aster
Callistephus chinensis
4 – 18 Mar
10 Jun
6-8 wk
29 Apr
22 Jul
5 wk after
2 May
12 Jul
6 wk after
Annual phlox
Phlox drummondii
18 Feb – 4 Mar
10 Jun
6-8 wk
15 Apr
22 Jul
3 wk after
2 May
12 Jul
6 wk after
Hollyhock
Alcea rosea
25 Jan – 8 Feb
6-8 wk
22 Mar
0 wk
4 Apr
2 wk after
Alpine delphinium
Delphinium elatum
28 Dec – 25 Jan
27 Apr
8-12 wk
22 Mar
22 Jun
0 wk
17 Apr
12 Jun
4 wk after
African marigold
Tagetes erecta
4 – 18 Mar
10 Jun
6-8 wk
29 Apr
22 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
27 Jan – 10 Feb
31 May
6-8 wk
24 Mar
12 Jul
0 wk
2 May
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Jan
17 Apr
8-10 wk
22 Mar
12 Jun
0 wk
17 Apr
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
2 – 30 Mar
10 Jun
6-10 wk
11 May
22 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
22 Mar
22 Jul
0 wk
16 Mar
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
18 Feb – 4 Mar
17 May
8-10 wk
29 Apr
12 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
25 Jan – 8 Feb
11 May
6-8 wk
22 Mar
22 Jun
0 wk
9 Mar
12 Jun
2 wk before