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Method
Rel. frost
Last spring frost (0°C) 25 Mar Normal year · 20 years of data
Frost-free season 247 days 25 Mar – 27 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)
4 – 18 Feb
22 Jun
5-7 wk
25 Mar
27 Jul
0 wk
19 Mar
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Feb
4 Jul
4-6 wk
25 Mar
1 Aug
0 wk
19 Mar
22 Jul
1 wk before
Chili pepper
Capsicum annuum
19 Feb – 19 Mar
21 Apr
8-12 wk
14 May
16 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Feb
17 Jun
5-7 wk
25 Mar
22 Jul
0 wk
12 Mar
12 Jul
2 wk before
Garden cucumber
Cucumis sativus
16 – 23 Apr
1 Jul
3-4 wk
14 May
22 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 Apr
14 Jun
4-5 wk
14 May
12 Jul
7 wk after
5 May
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Fleece
16 – 23 May
11 Jun
3-4 wk
13 Jun
2 Jul
11 wk after
Onion
Allium cepa (Cepa-gruppen)
31 Dec – 28 Jan
7 Apr
8-12 wk
25 Mar
2 Jun
0 wk
7 Apr
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 Mar
22 Jun
1 wk before
19 Mar
12 Jun
1 wk before
Maize
Zea mays
4 – 11 Apr
21 Jun
3-4 wk
2 May
12 Jul
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Feb – 6 Mar
11 Jul
3-4 wk
27 Mar
1 Aug
0 wk
7 Apr
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 Mar
12 Jul
0 wk
12 Mar
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Feb
17 Jun
5-7 wk
25 Mar
22 Jul
0 wk
12 Mar
12 Jul
2 wk before
Potato
Solanum tuberosum
16 Feb – 2 Mar
14 Jun
4-6 wk
30 Mar
12 Jul
1 wk after
30 Mar
2 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Feb
27 Jun
5-7 wk
25 Mar
1 Aug
0 wk
19 Mar
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
16 – 23 Apr
16 Jul
3-4 wk
14 May
6 Aug
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
27 Feb – 6 Mar
10 Jul
3-4 wk
27 Mar
31 Jul
0 wk
7 Apr
21 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Lettuce
Lactuca sativa
25 Feb – 4 Mar
16 Jul
3-4 wk
25 Mar
6 Aug
0 wk
19 Mar
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Feb
8 Jun
2-4 wk
12 Mar
22 Jun
2 wk before
12 Mar
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 Mar
22 Jun
1 wk before
19 Mar
12 Jun
1 wk before
Spinach
Spinacia oleracea
25 Feb – 4 Mar
31 Jul
3-4 wk
25 Mar
21 Aug
0 wk
5 Mar
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
26 Apr – 10 May
4-6 wk
7 Jun
11 wk after
Garden tomato
Solanum lycopersicum
7 – 21 Mar
31 May
6-8 wk
2 May
12 Jul
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
4 – 18 Apr
18 Jul
2-4 wk
2 May
1 Aug
5 wk after
5 May
22 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Feb
29 Jun
4-6 wk
25 Mar
27 Jul
0 wk
Garden pea
Pisum sativum
25 Feb – 4 Mar
1 Jul
3-4 wk
25 Mar
22 Jul
0 wk
19 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
2 – 16 Apr
24 Jun
4-6 wk
14 May
22 Jul
7 wk after
Lemon balm
Melissa officinalis
14 – 28 Jan
27 May
8-10 wk
25 Mar
22 Jul
0 wk
20 Apr
12 Jul
4 wk after
Dill
Anethum graveolens
19 Mar
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
Season too short
28 Jan – 11 Feb
10 Jun
6-8 wk
25 Mar
22 Jul
0 wk
19 Feb
12 Jul
5 wk before
Spearmint
Mentha spicata
31 Dec – 28 Jan
27 May
8-12 wk
25 Mar
22 Jul
0 wk
20 Apr
12 Jul
4 wk after
Coriander
Coriandrum sativum
25 Mar
21 Aug
0 wk
7 Apr
11 Aug
2 wk after
Garden sage
Salvia officinalis
16 – 30 Jan
12 May
8-10 wk
27 Mar
7 Jul
0 wk
Common thyme
Thymus vulgaris
14 – 28 Jan
17 May
8-10 wk
25 Mar
12 Jul
0 wk
Oregano
Origanum vulgare
28 Jan – 11 Feb
31 May
6-8 wk
25 Mar
12 Jul
0 wk
20 Apr
2 Jul
4 wk after
Parsley
Petroselinum crispum
28 Jan – 11 Feb
31 May
6-8 wk
25 Mar
12 Jul
0 wk
19 Mar
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
19 Dec – 16 Jan
13 Apr
10-14 wk
27 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
16 – 23 Apr
1 Jul
3-4 wk
14 May
22 Jul
7 wk after
Cornflower
Centaurea cyanus
25 Mar
22 Jul
0 wk
19 Mar
12 Jul
1 wk before
Statice
Limonium sinuatum
21 Feb – 7 Mar
17 May
8-10 wk
2 May
12 Jul
5 wk after
Sweet William
Dianthus barbatus
28 Jan – 11 Feb
6-8 wk
25 Mar
0 wk
30 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Mar
31 May
6-8 wk
2 May
12 Jul
5 wk after
7 Jun
2 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
28 Feb – 14 Mar
31 May
6-8 wk
25 Apr
12 Jul
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
23 Feb – 23 Mar
14 Jun
4-8 wk
20 Apr
12 Jul
4 wk after
20 Apr
2 Jul
4 wk after
Foxglove
Digitalis purpurea
14 – 28 Jan
8-10 wk
25 Mar
0 wk
7 Apr
2 wk after
Busy lizzie
Impatiens walleriana
19 Feb – 19 Mar
12 Jul
8-12 wk
14 May
6 Sep
7 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Mar
10 Jun
6-8 wk
2 May
22 Jul
5 wk after
Hyacinth bean
Dolichos lablab
22 Apr – 6 May
15 May
4-6 wk
3 Jun
12 Jun
10 wk after
Chinese lantern
Physalis alkekengi
16 – 30 Jan
27 Apr
8-10 wk
27 Mar
22 Jun
0 wk
Love in a mist
Nigella damascena
25 Mar
7 Jul
0 wk
19 Mar
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
7 – 21 Mar
21 May
6-8 wk
2 May
2 Jul
5 wk after
7 Jun
22 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Jan
27 Apr
8-12 wk
27 Mar
22 Jun
0 wk
Cardoon
Cynara cardunculus
7 Feb – 7 Mar
28 Mar
8-12 wk
2 May
23 May
5 wk after
Regal-foxtail
Ptilotus nobilis
19 Feb – 19 Mar
17 May
8-12 wk
14 May
12 Jul
7 wk after
Globe amaranth
Gomphrena globosa
19 Mar – 2 Apr
31 May
6-8 wk
14 May
12 Jul
7 wk after
Corn poppy
Papaver rhoeas
25 Mar
22 Jul
0 wk
19 Mar
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
31 Dec – 28 Jan
17 May
8-12 wk
25 Mar
12 Jul
0 wk
30 Mar
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
5 – 19 Mar
27 May
8-10 wk
14 May
22 Jul
7 wk after
Sweet pea
Lathyrus odoratus
28 Jan – 18 Feb
7 Jun
5-8 wk
25 Mar
12 Jul
0 wk
Stock
Matthiola incana
28 Jan – 11 Feb
10 Jun
6-8 wk
25 Mar
22 Jul
0 wk
7 Apr
12 Jul
2 wk after
Wormwood
Artemisia absinthium
28 Jan – 11 Feb
11 May
6-8 wk
25 Mar
22 Jun
0 wk
7 Apr
12 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
2 – 16 Apr
9 Jun
4-6 wk
14 May
7 Jul
7 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Jan
27 May
8-10 wk
25 Mar
22 Jul
0 wk
30 Mar
12 Jul
1 wk after
Petunia
Petunia
7 Feb – 7 Mar
17 May
8-12 wk
2 May
12 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Jan – 13 Feb
11 May
6-8 wk
27 Mar
22 Jun
0 wk
5 May
12 Jun
6 wk after
Common zinnia
Zinnia elegans
21 Mar – 4 Apr
24 Jun
4-6 wk
2 May
22 Jul
5 wk after
Common morning glory
Ipomoea purpurea
9 – 23 Apr
1 Jul
3-5 wk
14 May
22 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
21 Mar – 4 Apr
14 Jun
4-6 wk
2 May
12 Jul
5 wk after
5 May
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
11 Mar – 8 Apr
16 Jun
8-12 wk
3 Jun
11 Aug
10 wk after
Bee balm
Monarda didyma
31 Dec – 28 Jan
27 Apr
8-12 wk
25 Mar
22 Jun
0 wk
20 Apr
12 Jun
4 wk after
Yarrow
Achillea millefolium
28 Jan – 11 Feb
11 Apr
6-8 wk
25 Mar
23 May
0 wk
7 Apr
13 May
2 wk after
Safflower
Carthamus tinctorius
25 Mar
22 Jun
0 wk
19 Mar
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
28 Jan – 11 Feb
31 May
6-8 wk
25 Mar
12 Jul
0 wk
7 Feb
2 Jul
7 wk before
Bishop's flower
Ammi majus
11 – 25 Feb
14 Jun
4-6 wk
25 Mar
12 Jul
0 wk
7 Apr
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
19 Feb – 5 Mar
13 Apr
10-12 wk
14 May
22 Jun
7 wk after
Sunflower
Helianthus annuus
4 – 11 Apr
21 Jun
3-4 wk
2 May
12 Jul
5 wk after
20 Apr
2 Jul
4 wk after
China aster
Callistephus chinensis
7 – 21 Mar
10 Jun
6-8 wk
2 May
22 Jul
5 wk after
5 May
12 Jul
6 wk after
Annual phlox
Phlox drummondii
21 Feb – 7 Mar
10 Jun
6-8 wk
18 Apr
22 Jul
3 wk after
5 May
12 Jul
6 wk after
Hollyhock
Alcea rosea
28 Jan – 11 Feb
6-8 wk
25 Mar
0 wk
7 Apr
2 wk after
Alpine delphinium
Delphinium elatum
31 Dec – 28 Jan
27 Apr
8-12 wk
25 Mar
22 Jun
0 wk
20 Apr
12 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Mar
10 Jun
6-8 wk
2 May
22 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
30 Jan – 13 Feb
31 May
6-8 wk
27 Mar
12 Jul
0 wk
5 May
2 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Jan
17 Apr
8-10 wk
25 Mar
12 Jun
0 wk
20 Apr
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
5 Mar – 2 Apr
10 Jun
6-10 wk
14 May
22 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
25 Mar
22 Jul
0 wk
19 Mar
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
21 Feb – 7 Mar
17 May
8-10 wk
2 May
12 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
28 Jan – 11 Feb
11 May
6-8 wk
25 Mar
22 Jun
0 wk
12 Mar
12 Jun
2 wk before