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Method
Rel. frost
Last spring frost (0°C) 26 May Frost 1 of 10 years · 20 years of data
Frost-free season 140 days 26 May – 13 Oct
Probability that frost is over

90% = 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)
7 – 21 Apr
15 Jun
5-7 wk
26 May
20 Jul
0 wk
30 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
14 – 28 Apr
27 Jun
4-6 wk
26 May
25 Jul
0 wk
30 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
9 Mar – 6 Apr
8-12 wk
1 Jun
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Apr
10 Jun
5-7 wk
26 May
15 Jul
0 wk
26 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
4 – 11 May
20 May
3-4 wk
1 Jun
10 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
23 – 30 May
7 Jun
4-5 wk
27 Jun
5 Jul
5 wk after
14 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
6 – 13 Jun
3-4 wk
4 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
3 – 31 Mar
31 Mar
8-12 wk
26 May
26 May
0 wk
16 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
30 May
15 Jun
1 wk after
30 May
5 Jun
1 wk after
Maize
Zea mays
Greenhouse
28 Apr – 5 May
10 May
3-4 wk
26 May
31 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Apr – 7 May
4 Jul
3-4 wk
28 May
25 Jul
0 wk
16 Jun
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
26 May
5 Jul
0 wk
26 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Apr
10 Jun
5-7 wk
26 May
15 Jul
0 wk
26 May
5 Jul
0 wk
Potato
Solanum tuberosum
30 Apr – 14 May
7 Jun
4-6 wk
11 Jun
5 Jul
2 wk after
11 Jun
25 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Apr
20 Jun
5-7 wk
26 May
25 Jul
0 wk
30 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
11 – 18 May
25 May
3-4 wk
8 Jun
15 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Apr – 7 May
26 Jun
3-4 wk
28 May
17 Jul
0 wk
16 Jun
7 Jul
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
14 – 28 Apr
22 Jun
4-6 wk
26 May
20 Jul
0 wk
Lettuce
Lactuca sativa
28 Apr – 5 May
9 Jul
3-4 wk
26 May
30 Jul
0 wk
30 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
14 – 28 Apr
22 Jun
4-6 wk
26 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
28 Apr – 12 May
1 Jun
2-4 wk
26 May
15 Jun
0 wk
26 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
30 May
15 Jun
1 wk after
30 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
28 Apr – 5 May
24 Jul
3-4 wk
26 May
14 Aug
0 wk
22 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
27 Jun – 11 Jul
4-6 wk
8 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
31 Mar – 14 Apr
19 Apr
6-8 wk
26 May
31 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
4 – 18 May
27 May
2-4 wk
1 Jun
10 Jun
1 wk after
30 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
14 – 28 Apr
22 Jun
4-6 wk
26 May
20 Jul
0 wk
Garden pea
Pisum sativum
28 Apr – 5 May
24 Jun
3-4 wk
26 May
15 Jul
0 wk
30 May
5 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
27 Apr – 11 May
3 May
4-6 wk
8 Jun
2 wk after
Lemon balm
Melissa officinalis
17 – 31 Mar
20 May
8-10 wk
26 May
15 Jul
0 wk
30 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
30 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
31 Mar – 14 Apr
3 Jun
6-8 wk
26 May
15 Jul
0 wk
30 May
5 Jul
1 wk after
Spearmint
Mentha spicata
3 – 31 Mar
20 May
8-12 wk
26 May
15 Jul
0 wk
30 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
26 May
14 Aug
0 wk
16 Jun
4 Aug
3 wk after
Garden sage
Salvia officinalis
19 Mar – 2 Apr
5 May
8-10 wk
28 May
30 Jun
0 wk
Common thyme
Thymus vulgaris
17 – 31 Mar
10 May
8-10 wk
26 May
5 Jul
0 wk
Oregano
Origanum vulgare
31 Mar – 14 Apr
24 May
6-8 wk
26 May
5 Jul
0 wk
30 Jun
5 wk after
Parsley
Petroselinum crispum
31 Mar – 14 Apr
24 May
6-8 wk
26 May
5 Jul
0 wk
30 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
19 Feb – 19 Mar
6 Apr
10-14 wk
28 May
15 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
Fleece
11 – 18 May
3-4 wk
8 Jun
2 wk after
Cornflower
Centaurea cyanus
26 May
15 Jul
0 wk
30 May
5 Jul
1 wk after
Statice
Limonium sinuatum
30 Mar – 13 Apr
6 Apr
8-10 wk
8 Jun
2 wk after
Sweet William
Dianthus barbatus
31 Mar – 14 Apr
6-8 wk
26 May
0 wk
11 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
13 – 27 Apr
20 Apr
6-8 wk
8 Jun
2 wk after
8 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
11 – 25 Apr
27 Apr
6-8 wk
6 Jun
8 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
5 May – 2 Jun
11 May
4-8 wk
30 Jun
5 wk after
30 Jun
5 wk after
Foxglove
Digitalis purpurea
17 – 31 Mar
8-10 wk
26 May
0 wk
16 Jun
3 wk after
Busy lizzie
Impatiens walleriana
4 Apr – 2 May
21 May
8-12 wk
27 Jun
16 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
13 – 27 Apr
30 Apr
6-8 wk
8 Jun
11 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
27 Apr – 11 May
4-6 wk
8 Jun
2 wk after
Chinese lantern
Physalis alkekengi
19 Mar – 2 Apr
20 Apr
8-10 wk
28 May
15 Jun
0 wk
Love in a mist
Nigella damascena
26 May
30 Jun
0 wk
30 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
13 – 27 Apr
6-8 wk
8 Jun
2 wk after
8 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
5 Mar – 2 Apr
20 Apr
8-12 wk
28 May
15 Jun
0 wk
Cardoon
Cynara cardunculus
16 Mar – 13 Apr
21 Mar
8-12 wk
8 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
16 Mar – 13 Apr
26 Mar
8-12 wk
8 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
13 – 27 Apr
6-8 wk
8 Jun
2 wk after
Corn poppy
Papaver rhoeas
26 May
15 Jul
0 wk
30 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
3 – 31 Mar
10 May
8-12 wk
26 May
5 Jul
0 wk
11 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
18 Apr – 2 May
8-10 wk
27 Jun
5 wk after
Sweet pea
Lathyrus odoratus
31 Mar – 21 Apr
31 May
5-8 wk
26 May
5 Jul
0 wk
Stock
Matthiola incana
31 Mar – 14 Apr
3 Jun
6-8 wk
26 May
15 Jul
0 wk
16 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
31 Mar – 14 Apr
4 May
6-8 wk
26 May
15 Jun
0 wk
16 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
20 Apr – 4 May
6 May
4-6 wk
1 Jun
3 Jun
1 wk after
Garden pansy
Viola × wittrockiana
17 – 31 Mar
20 May
8-10 wk
26 May
15 Jul
0 wk
11 Jun
5 Jul
2 wk after
Petunia
Petunia
16 Mar – 13 Apr
6 Apr
8-12 wk
8 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
2 – 16 Apr
4 May
6-8 wk
28 May
15 Jun
0 wk
14 Jul
7 wk after
Common zinnia
Zinnia elegans
27 Apr – 11 May
3 May
4-6 wk
8 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
4 – 18 May
10 May
3-5 wk
8 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
27 Apr – 11 May
11 May
4-6 wk
8 Jun
8 Jun
2 wk after
14 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
4 Apr – 2 May
25 Apr
8-12 wk
27 Jun
5 wk after
Bee balm
Monarda didyma
3 – 31 Mar
20 Apr
8-12 wk
26 May
15 Jun
0 wk
30 Jun
5 wk after
Yarrow
Achillea millefolium
31 Mar – 14 Apr
4 Apr
6-8 wk
26 May
0 wk
16 Jun
3 wk after
Safflower
Carthamus tinctorius
26 May
15 Jun
0 wk
30 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
31 Mar – 14 Apr
24 May
6-8 wk
26 May
5 Jul
0 wk
8 May
25 Jun
3 wk before
Bishop's flower
Ammi majus
14 – 28 Apr
7 Jun
4-6 wk
26 May
5 Jul
0 wk
16 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
9 – 23 Mar
22 Mar
10-12 wk
1 Jun
1 wk after
Sunflower
Helianthus annuus
11 – 18 May
14 Jun
3-4 wk
8 Jun
5 Jul
2 wk after
30 Jun
5 wk after
China aster
Callistephus chinensis
13 – 27 Apr
3 Jun
6-8 wk
8 Jun
15 Jul
2 wk after
14 Jul
7 wk after
Annual phlox
Phlox drummondii
6 – 20 Apr
30 Apr
6-8 wk
1 Jun
11 Jun
1 wk after
14 Jul
7 wk after
Hollyhock
Alcea rosea
31 Mar – 14 Apr
6-8 wk
26 May
0 wk
16 Jun
3 wk after
Alpine delphinium
Delphinium elatum
3 – 31 Mar
20 Apr
8-12 wk
26 May
15 Jun
0 wk
30 Jun
5 wk after
African marigold
Tagetes erecta
13 – 27 Apr
30 Apr
6-8 wk
8 Jun
11 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
2 – 16 Apr
24 May
6-8 wk
28 May
5 Jul
0 wk
14 Jul
7 wk after
Wood sage
Salvia nemorosa
17 – 31 Mar
10 Apr
8-10 wk
26 May
5 Jun
0 wk
30 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
30 Mar – 27 Apr
19 Apr
6-10 wk
8 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
26 May
15 Jul
0 wk
30 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
30 Mar – 13 Apr
10 May
8-10 wk
8 Jun
5 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
31 Mar – 14 Apr
4 May
6-8 wk
26 May
15 Jun
0 wk
16 Jun
3 wk after