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Method
Rel. frost
Last spring frost (0°C) 1 May Normal year · 20 years of data
Frost-free season 167 days 1 May – 15 Oct
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)
Season too short
13 – 27 Mar
19 Jun
5-7 wk
1 May
24 Jul
0 wk
28 Mar
14 Jul
5 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
Season too short
20 Mar – 3 Apr
1 Jul
4-6 wk
1 May
29 Jul
0 wk
28 Mar
19 Jul
5 wk before
Chili pepper
Capsicum annuum
Season too short
24 Feb – 24 Mar
14 May
8-12 wk
19 May
9 Jul
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
13 – 27 Mar
14 Jun
5-7 wk
1 May
19 Jul
0 wk
16 Mar
9 Jul
7 wk before
Garden cucumber
Cucumis sativus
Season too short
21 – 28 Apr
8 Jul
3-4 wk
19 May
29 Jul
3 wk after
Florence Fennel
Foeniculum vulgare
Season too short
14 – 21 Apr
11 Jun
4-5 wk
19 May
9 Jul
3 wk after
14 May
29 Jun
2 wk after
Butter bean
Phaseolus lunatus
Season too short
24 – 31 May
8 Jun
3-4 wk
21 Jun
29 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
Season too short
6 Feb – 6 Mar
4 Apr
8-12 wk
1 May
30 May
0 wk
18 Apr
20 May
2 wk before
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
28 Mar
19 Jun
5 wk before
28 Mar
9 Jun
5 wk before
Maize
Zea mays
Season too short
3 – 10 Apr
28 Jun
3-4 wk
1 May
19 Jul
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
Season too short
3 – 10 Apr
8 Jul
3-4 wk
1 May
29 Jul
0 wk
18 Apr
19 Jul
2 wk before
Carrot
Daucus carota subsp. sativus var. sativus
1 May
9 Jul
0 wk
18 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
13 – 27 Mar
14 Jun
5-7 wk
1 May
19 Jul
0 wk
16 Mar
9 Jul
7 wk before
Potato
Solanum tuberosum
Season too short
28 Feb – 14 Mar
11 Jun
4-6 wk
11 Apr
9 Jul
3 wk before
11 Apr
29 Jun
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
Season too short
13 – 27 Mar
24 Jun
5-7 wk
1 May
29 Jul
0 wk
28 Mar
19 Jul
5 wk before
Pumpkin
Cucurbita pepo
Season too short
21 – 28 Apr
13 Jul
3-4 wk
19 May
3 Aug
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Season too short
3 – 10 Apr
8 Jul
3-4 wk
1 May
29 Jul
0 wk
18 Apr
19 Jul
2 wk before
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
20 Mar – 3 Apr
26 Jun
4-6 wk
1 May
24 Jul
0 wk
Lettuce
Lactuca sativa
Season too short
3 – 10 Apr
13 Jul
3-4 wk
1 May
3 Aug
0 wk
28 Mar
24 Jul
5 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
20 Mar – 3 Apr
26 Jun
4-6 wk
1 May
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
16 Feb – 2 Mar
5 Jun
2-4 wk
16 Mar
19 Jun
7 wk before
16 Mar
9 Jun
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
28 Mar
19 Jun
5 wk before
28 Mar
9 Jun
5 wk before
Spinach
Spinacia oleracea
Season too short
3 – 10 Apr
28 Jul
3-4 wk
1 May
18 Aug
0 wk
4 Mar
8 Aug
8 wk before
Sweet potato
Ipomoea batatas
2 – 16 Jun
4-6 wk
14 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
3 – 17 Apr
15 Jul
2-4 wk
1 May
29 Jul
0 wk
14 May
19 Jul
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
20 Mar – 3 Apr
26 Jun
4-6 wk
1 May
24 Jul
0 wk
Garden pea
Pisum sativum
Season too short
3 – 10 Apr
28 Jun
3-4 wk
1 May
19 Jul
0 wk
28 Mar
9 Jul
5 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Season too short
7 – 21 Apr
21 Jun
4-6 wk
19 May
19 Jul
3 wk after
Lemon balm
Melissa officinalis
Season too short
20 Feb – 6 Mar
24 May
8-10 wk
1 May
19 Jul
0 wk
30 Apr
9 Jul
0 wk
Dill
Anethum graveolens
25 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
28 Mar
9 Jul
5 wk before
Spearmint
Mentha spicata
Season too short
6 Feb – 6 Mar
24 May
8-12 wk
1 May
19 Jul
0 wk
30 Apr
9 Jul
0 wk
Coriander
Coriandrum sativum
1 May
18 Aug
0 wk
14 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
Season too short
20 Feb – 6 Mar
9 May
8-10 wk
1 May
4 Jul
0 wk
Common thyme
Thymus vulgaris
Season too short
20 Feb – 6 Mar
14 May
8-10 wk
1 May
9 Jul
0 wk
Oregano
Origanum vulgare
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
30 Apr
29 Jun
0 wk
Parsley
Petroselinum crispum
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
28 Mar
29 Jun
5 wk before
Rosemary
Salvia rosmarinus
Season too short
23 Jan – 20 Feb
10 Apr
10-14 wk
1 May
19 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
Season too short
21 – 28 Apr
28 Jun
3-4 wk
19 May
19 Jul
3 wk after
Cornflower
Centaurea cyanus
Season too short
1 May
19 Jul
0 wk
28 Mar
9 Jul
5 wk before
Statice
Limonium sinuatum
Season too short
20 Feb – 6 Mar
14 May
8-10 wk
1 May
9 Jul
0 wk
Sweet William
Dianthus barbatus
6 – 20 Mar
6-8 wk
1 May
0 wk
6 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
3 Jun
29 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
5 Mar – 2 Apr
11 Jun
4-8 wk
30 Apr
9 Jul
0 wk
30 Apr
29 Jun
0 wk
Foxglove
Digitalis purpurea
20 Feb – 6 Mar
8-10 wk
1 May
0 wk
14 May
2 wk after
Busy lizzie
Impatiens walleriana
Season too short
24 Feb – 24 Mar
9 Jul
8-12 wk
19 May
3 Sep
3 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
22 May
4-6 wk
28 May
19 Jun
4 wk after
Chinese lantern
Physalis alkekengi
Season too short
20 Feb – 6 Mar
24 Apr
8-10 wk
1 May
19 Jun
0 wk
Love in a mist
Nigella damascena
1 May
4 Jul
0 wk
25 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Season too short
6 – 20 Mar
18 May
6-8 wk
1 May
29 Jun
0 wk
3 Jun
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Season too short
6 Feb – 6 Mar
24 Apr
8-12 wk
1 May
19 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
6 Feb – 6 Mar
25 Mar
8-12 wk
1 May
20 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
24 Feb – 24 Mar
14 May
8-12 wk
19 May
9 Jul
3 wk after
Globe amaranth
Gomphrena globosa
Season too short
24 Mar – 7 Apr
28 May
6-8 wk
19 May
9 Jul
3 wk after
Corn poppy
Papaver rhoeas
1 May
19 Jul
0 wk
25 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
Season too short
6 Feb – 6 Mar
14 May
8-12 wk
1 May
9 Jul
0 wk
11 Apr
29 Jun
3 wk before
Flossflower
Ageratum houstonianum
Season too short
10 – 24 Mar
24 May
8-10 wk
19 May
19 Jul
3 wk after
Sweet pea
Lathyrus odoratus
Season too short
6 – 27 Mar
4 Jun
5-8 wk
1 May
9 Jul
0 wk
Stock
Matthiola incana
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
18 Apr
9 Jul
2 wk before
Wormwood
Artemisia absinthium
Season too short
6 – 20 Mar
8 May
6-8 wk
1 May
19 Jun
0 wk
18 Apr
9 Jun
2 wk before
Mexican sunflower
Tithonia rotundifolia
Season too short
7 – 21 Apr
6 Jun
4-6 wk
19 May
4 Jul
3 wk after
Garden pansy
Viola × wittrockiana
Season too short
20 Feb – 6 Mar
24 May
8-10 wk
1 May
19 Jul
0 wk
11 Apr
9 Jul
3 wk before
Petunia
Petunia
Season too short
6 Feb – 6 Mar
14 May
8-12 wk
1 May
9 Jul
0 wk
Sweet Scabious
Scabiosa atropurpurea
Season too short
6 – 20 Mar
8 May
6-8 wk
1 May
19 Jun
0 wk
14 May
9 Jun
2 wk after
Common zinnia
Zinnia elegans
Season too short
20 Mar – 3 Apr
21 Jun
4-6 wk
1 May
19 Jul
0 wk
Common morning glory
Ipomoea purpurea
Season too short
14 – 28 Apr
28 Jun
3-5 wk
19 May
19 Jul
3 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
20 Mar – 3 Apr
11 Jun
4-6 wk
1 May
9 Jul
0 wk
14 May
29 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
5 Mar – 2 Apr
13 Jun
8-12 wk
28 May
8 Aug
4 wk after
Bee balm
Monarda didyma
Season too short
6 Feb – 6 Mar
24 Apr
8-12 wk
1 May
19 Jun
0 wk
30 Apr
9 Jun
0 wk
Yarrow
Achillea millefolium
Season too short
6 – 20 Mar
8 Apr
6-8 wk
1 May
20 May
0 wk
18 Apr
10 May
2 wk before
Safflower
Carthamus tinctorius
Season too short
1 May
19 Jun
0 wk
28 Mar
9 Jun
5 wk before
Iceland poppy
Papaver nudicaule
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
16 Mar
29 Jun
7 wk before
Bishop's flower
Ammi majus
Season too short
20 Mar – 3 Apr
11 Jun
4-6 wk
1 May
9 Jul
0 wk
18 Apr
29 Jun
2 wk before
Drumsticks
Pycnosorus globosus
Season too short
24 Feb – 10 Mar
10 Apr
10-12 wk
19 May
19 Jun
3 wk after
Sunflower
Helianthus annuus
Season too short
3 – 10 Apr
18 Jun
3-4 wk
1 May
9 Jul
0 wk
30 Apr
29 Jun
0 wk
China aster
Callistephus chinensis
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
14 May
9 Jul
2 wk after
Annual phlox
Phlox drummondii
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
14 May
9 Jul
2 wk after
Hollyhock
Alcea rosea
6 – 20 Mar
6-8 wk
1 May
0 wk
14 May
2 wk after
Alpine delphinium
Delphinium elatum
Season too short
6 Feb – 6 Mar
24 Apr
8-12 wk
1 May
19 Jun
0 wk
30 Apr
9 Jun
0 wk
African marigold
Tagetes erecta
Season too short
6 – 20 Mar
7 Jun
6-8 wk
1 May
19 Jul
0 wk
Black-eyed Susan
Rudbeckia hirta
Season too short
6 – 20 Mar
28 May
6-8 wk
1 May
9 Jul
0 wk
14 May
29 Jun
2 wk after
Wood sage
Salvia nemorosa
Season too short
20 Feb – 6 Mar
14 Apr
8-10 wk
1 May
9 Jun
0 wk
30 Apr
30 May
0 wk
Black-eyed susan vine
Thunbergia alata
Season too short
10 Mar – 7 Apr
7 Jun
6-10 wk
19 May
19 Jul
3 wk after
California goldenpoppy
Eschscholzia californica
1 May
19 Jul
0 wk
25 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
Season too short
20 Feb – 6 Mar
14 May
8-10 wk
1 May
9 Jul
0 wk
Water forget-me-not
Myosotis scorpioides
Season too short
6 – 20 Mar
8 May
6-8 wk
1 May
19 Jun
0 wk
18 Apr
9 Jun
2 wk before