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Method
Rel. frost
Last spring frost (0°C) 20 May Frost 3 of 4 years · 20 years of data
Frost-free season 112 days 20 May – 9 Sep
Probability that frost is over

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