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Method
Rel. frost
Last spring frost (0°C) 18 May Frost 3 of 4 years · 20 years of data
Frost-free season 115 days 18 May – 10 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)
30 Mar – 13 Apr
11 Jun
5-7 wk
18 May
16 Jul
0 wk
19 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
23 Jun
4-6 wk
18 May
21 Jul
0 wk
19 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
1 – 29 Mar
27 Mar
8-12 wk
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
3 – 10 May
21 May
3-4 wk
31 May
11 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
26 Apr – 3 May
30 May
4-5 wk
31 May
27 Jun
2 wk after
12 Jun
17 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
10 Mar
8-12 wk
18 May
0 wk
31 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
25 May
0 wk
19 May
0 wk
Maize
Zea mays
Fleece
26 Apr – 3 May
11 May
3-4 wk
24 May
1 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
26 Jun
3-4 wk
20 May
17 Jul
0 wk
31 May
7 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
29 Jun
0 wk
18 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 Jul
0 wk
Potato
Solanum tuberosum
16 – 30 Apr
29 Apr
4-6 wk
28 May
1 wk after
28 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
14 Jun
5-7 wk
18 May
19 Jul
0 wk
19 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
3 – 10 May
6 Jun
3-4 wk
31 May
27 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
12 May
3-4 wk
20 May
2 Jun
0 wk
31 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
3 Jul
3-4 wk
18 May
24 Jul
0 wk
19 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
13 May
2-4 wk
18 May
27 May
0 wk
18 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
25 May
0 wk
19 May
0 wk
Spinach
Spinacia oleracea
20 – 27 Apr
20 Jul
3-4 wk
18 May
10 Aug
0 wk
15 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
12 – 26 Jun
4-6 wk
24 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
29 Mar – 12 Apr
20 Apr
6-8 wk
24 May
1 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 May
28 May
2-4 wk
31 May
11 Jun
2 wk after
30 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
18 Jun
3-4 wk
18 May
9 Jul
0 wk
19 May
29 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
19 Apr – 3 May
15 May
4-6 wk
31 May
12 Jun
2 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
14 May
8-10 wk
18 May
9 Jul
0 wk
12 Jun
29 Jun
4 wk after
Dill
Anethum graveolens
19 May
17 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
30 May
6-8 wk
18 May
11 Jul
0 wk
19 May
1 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
16 May
8-12 wk
18 May
11 Jul
0 wk
12 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
18 May
6 Aug
0 wk
31 May
27 Jul
2 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
1 May
8-10 wk
20 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
6 May
8-10 wk
18 May
1 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
12 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
19 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
23 Mar
10-14 wk
20 May
1 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
3 – 10 May
22 May
3-4 wk
31 May
12 Jun
2 wk after
Cornflower
Centaurea cyanus
18 May
11 Jul
0 wk
19 May
1 Jul
0 wk
Statice
Limonium sinuatum
22 Mar – 5 Apr
13 Apr
8-10 wk
31 May
8 Jun
2 wk after
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
28 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
5 – 19 Apr
27 Apr
6-8 wk
31 May
8 Jun
2 wk after
24 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
3 – 17 Apr
5 May
6-8 wk
29 May
16 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
17 Apr – 15 May
19 May
4-8 wk
12 Jun
16 Jun
4 wk after
12 Jun
4 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
31 May
2 wk after
Busy lizzie
Impatiens walleriana
27 Mar – 24 Apr
2 Jun
8-12 wk
19 Jun
28 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
5 – 19 Apr
7 May
6-8 wk
31 May
18 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
4-6 wk
31 May
2 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Mar
12 Apr
8-10 wk
20 May
7 Jun
0 wk
Love in a mist
Nigella damascena
18 May
24 Jun
0 wk
19 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
29 Mar – 12 Apr
29 Apr
6-8 wk
24 May
10 Jun
1 wk after
7 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
12 Apr
8-12 wk
20 May
7 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
23 Feb – 23 Mar
17 Mar
8-12 wk
18 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
8 Mar – 5 Apr
7 Apr
8-12 wk
31 May
2 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
5 – 19 Apr
21 Apr
6-8 wk
31 May
2 Jun
2 wk after
Corn poppy
Papaver rhoeas
18 May
9 Jul
0 wk
19 May
29 Jun
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
4 May
8-12 wk
18 May
29 Jun
0 wk
28 May
19 Jun
1 wk after
Flossflower
Ageratum houstonianum
10 – 24 Apr
23 Apr
8-10 wk
19 Jun
5 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
27 May
5-8 wk
18 May
1 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
28 May
6-8 wk
18 May
9 Jul
0 wk
31 May
29 Jun
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
12 – 26 Apr
14 May
4-6 wk
24 May
11 Jun
1 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
16 May
8-10 wk
18 May
11 Jul
0 wk
28 May
1 Jul
1 wk after
Petunia
Petunia
8 Mar – 5 Apr
13 Apr
8-12 wk
31 May
8 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
26 Apr
6-8 wk
20 May
7 Jun
0 wk
30 Jun
6 wk after
Common zinnia
Zinnia elegans
19 Apr – 3 May
15 May
4-6 wk
31 May
12 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
26 Apr – 10 May
22 May
3-5 wk
31 May
12 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
19 Apr – 3 May
19 May
4-6 wk
31 May
16 Jun
2 wk after
30 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
27 Mar – 24 Apr
7 May
8-12 wk
19 Jun
2 Jul
5 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
14 Apr
8-12 wk
18 May
9 Jun
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
31 Mar
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
11 Jun
0 wk
19 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
2 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
1 Jun
4-6 wk
18 May
29 Jun
0 wk
31 May
19 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
1 – 15 Mar
28 Mar
10-12 wk
24 May
6 Jun
1 wk after
Sunflower
Helianthus annuus
3 – 10 May
31 May
3-4 wk
31 May
21 Jun
2 wk after
12 Jun
4 wk after
China aster
Callistephus chinensis
5 – 19 Apr
20 May
6-8 wk
31 May
1 Jul
2 wk after
30 Jun
6 wk after
Annual phlox
Phlox drummondii
29 Mar – 12 Apr
7 May
6-8 wk
24 May
18 Jun
1 wk after
30 Jun
6 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
14 Apr
8-12 wk
18 May
9 Jun
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
5 – 19 Apr
7 May
6-8 wk
31 May
18 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
10 May
6-8 wk
20 May
21 Jun
0 wk
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
4 Apr
8-10 wk
18 May
30 May
0 wk
12 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
22 Mar – 19 Apr
1 May
6-10 wk
31 May
12 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
18 May
8 Jul
0 wk
19 May
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
16 Apr
8-10 wk
31 May
11 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 Jun
2 wk after