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Method
Rel. frost
Last spring frost (0°C) 25 May Frost 1 of 10 years · 20 years of data
Frost-free season 148 days 25 May – 20 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)
6 – 20 Apr
15 Jun
5-7 wk
25 May
20 Jul
0 wk
29 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
13 – 27 Apr
27 Jun
4-6 wk
25 May
25 Jul
0 wk
29 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
17 Mar – 14 Apr
8-12 wk
9 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
6 – 20 Apr
10 Jun
5-7 wk
25 May
15 Jul
0 wk
25 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
12 – 19 May
22 May
3-4 wk
9 Jun
12 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
2 – 9 Jun
7 Jun
4-5 wk
7 Jul
6 wk after
13 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
14 – 21 Jun
3-4 wk
12 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
2 – 30 Mar
31 Mar
8-12 wk
25 May
26 May
0 wk
15 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
29 May
15 Jun
1 wk after
29 May
5 Jun
1 wk after
Maize
Zea mays
Greenhouse
28 Apr – 5 May
12 May
3-4 wk
26 May
2 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
5 – 12 May
4 Jul
3-4 wk
2 Jun
25 Jul
1 wk after
15 Jun
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 May
5 Jul
0 wk
25 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
6 – 20 Apr
10 Jun
5-7 wk
25 May
15 Jul
0 wk
25 May
5 Jul
0 wk
Potato
Solanum tuberosum
29 Apr – 13 May
7 Jun
4-6 wk
10 Jun
5 Jul
2 wk after
10 Jun
25 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
6 – 20 Apr
20 Jun
5-7 wk
25 May
25 Jul
0 wk
29 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
24 – 31 May
27 May
3-4 wk
21 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
5 – 12 May
16 Jun
3-4 wk
2 Jun
7 Jul
1 wk after
15 Jun
27 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Lettuce
Lactuca sativa
27 Apr – 4 May
9 Jul
3-4 wk
25 May
30 Jul
0 wk
29 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
27 Apr – 11 May
1 Jun
2-4 wk
25 May
15 Jun
0 wk
25 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
29 May
15 Jun
1 wk after
29 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
27 Apr – 4 May
24 Jul
3-4 wk
25 May
14 Aug
0 wk
21 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
26 Jun – 10 Jul
4-6 wk
7 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
31 Mar – 14 Apr
21 Apr
6-8 wk
26 May
2 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
12 – 26 May
29 May
2-4 wk
9 Jun
12 Jun
2 wk after
29 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Garden pea
Pisum sativum
27 Apr – 4 May
24 Jun
3-4 wk
25 May
15 Jul
0 wk
29 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
10 – 24 May
4-6 wk
21 Jun
4 wk after
Lemon balm
Melissa officinalis
16 – 30 Mar
20 May
8-10 wk
25 May
15 Jul
0 wk
29 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
29 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
30 Mar – 13 Apr
3 Jun
6-8 wk
25 May
15 Jul
0 wk
29 May
5 Jul
1 wk after
Spearmint
Mentha spicata
2 – 30 Mar
20 May
8-12 wk
25 May
15 Jul
0 wk
29 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
25 May
14 Aug
0 wk
15 Jun
4 Aug
3 wk after
Garden sage
Salvia officinalis
24 Mar – 7 Apr
5 May
8-10 wk
2 Jun
30 Jun
1 wk after
Common thyme
Thymus vulgaris
16 – 30 Mar
10 May
8-10 wk
25 May
5 Jul
0 wk
Oregano
Origanum vulgare
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
0 wk
29 Jun
5 wk after
Parsley
Petroselinum crispum
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
0 wk
29 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
24 Feb – 24 Mar
6 Apr
10-14 wk
2 Jun
15 Jun
1 wk after

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