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Method
Rel. frost
Last spring frost (0°C) 21 May Normal year · 20 years of data
Frost-free season 126 days 21 May – 24 Sep
Probability that frost is over

50% = Half of years are frost-free by this date. More about frost & season →

Custom date
Note: This location has a shorter growing season. Plants marked with Fleece, Greenhouse or Season too short need extra protection or are difficult to grow here.

Vegetables

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