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Method
Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 10 years · 20 years of data
Frost-free season 155 days 22 May – 24 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)
3 – 17 Apr
10 Jun
5-7 wk
22 May
15 Jul
0 wk
23 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
22 Jun
4-6 wk
22 May
20 Jul
0 wk
23 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
10 Mar – 7 Apr
8-12 wk
2 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Apr
5 Jun
5-7 wk
22 May
10 Jul
0 wk
22 May
30 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
5 – 12 May
7 Jun
3-4 wk
2 Jun
28 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 May
2 Jun
4-5 wk
25 Jun
30 Jun
5 wk after
4 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
4 – 11 Jun
3-4 wk
2 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
26 Mar
8-12 wk
22 May
0 wk
4 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
10 Jun
0 wk
23 May
31 May
0 wk
Maize
Zea mays
Greenhouse
28 Apr – 5 May
28 May
3-4 wk
26 May
18 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Apr – 7 May
29 Jun
3-4 wk
28 May
20 Jul
1 wk after
4 Jun
10 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
30 Jun
0 wk
22 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Apr
5 Jun
5-7 wk
22 May
10 Jul
0 wk
22 May
30 Jun
0 wk
Potato
Solanum tuberosum
20 Apr – 4 May
20 May
4-6 wk
1 Jun
17 Jun
1 wk after
1 Jun
7 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Apr
15 Jun
5-7 wk
22 May
20 Jul
0 wk
23 May
10 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
14 – 21 May
12 Jun
3-4 wk
11 Jun
3 Jul
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Apr – 7 May
29 May
3-4 wk
28 May
19 Jun
1 wk after
4 Jun
9 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
17 Jun
4-6 wk
22 May
15 Jul
0 wk
Lettuce
Lactuca sativa
24 Apr – 1 May
4 Jul
3-4 wk
22 May
25 Jul
0 wk
23 May
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Apr
17 Jun
4-6 wk
22 May
15 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
27 May
2-4 wk
22 May
10 Jun
0 wk
22 May
31 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
10 Jun
0 wk
23 May
31 May
0 wk
Spinach
Spinacia oleracea
24 Apr – 1 May
19 Jul
3-4 wk
22 May
9 Aug
0 wk
19 May
30 Jul
0 wk
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
31 Mar – 14 Apr
7 May
6-8 wk
26 May
18 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
5 – 19 May
14 Jun
2-4 wk
2 Jun
28 Jun
2 wk after
16 Jun
18 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
17 Jun
4-6 wk
22 May
15 Jul
0 wk
Garden pea
Pisum sativum
24 Apr – 1 May
19 Jun
3-4 wk
22 May
10 Jul
0 wk
23 May
30 Jun
0 wk

Herbs

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