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Method
Rel. frost
Last spring frost (0°C) 16 May Frost 3 of 4 years · 20 years of data
Frost-free season 107 days 16 May – 31 Aug
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)
28 Mar – 11 Apr
12 Jun
5-7 wk
16 May
17 Jul
0 wk
17 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Apr
24 Jun
4-6 wk
16 May
22 Jul
0 wk
17 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
27 Feb – 27 Mar
19 Mar
8-12 wk
22 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
24 Apr – 1 May
25 May
3-4 wk
22 May
15 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
24 Apr – 1 May
24 May
4-5 wk
29 May
21 Jun
2 wk after
10 Jun
11 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
27 May – 3 Jun
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Feb – 21 Mar
12 Mar
8-12 wk
16 May
0 wk
29 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 May
27 May
0 wk
17 May
17 May
0 wk
Maize
Zea mays
Fleece
24 Apr – 1 May
3 May
3-4 wk
22 May
24 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
20 Jun
3-4 wk
18 May
11 Jul
0 wk
29 May
1 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
16 May
28 Jun
0 wk
16 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Potato
Solanum tuberosum
14 – 28 Apr
6 May
4-6 wk
26 May
3 Jun
1 wk after
26 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Mar – 11 Apr
13 Jun
5-7 wk
16 May
18 Jul
0 wk
17 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
1 – 8 May
30 May
3-4 wk
29 May
20 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
14 May
3-4 wk
18 May
4 Jun
0 wk
29 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Apr
2 Jul
3-4 wk
16 May
23 Jul
0 wk
17 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Apr – 2 May
17 May
2-4 wk
16 May
31 May
0 wk
16 May
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 May
27 May
0 wk
17 May
17 May
0 wk
Spinach
Spinacia oleracea
18 – 25 Apr
21 Jul
3-4 wk
16 May
11 Aug
0 wk
13 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
10 – 24 Jun
4-6 wk
22 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
27 Mar – 10 Apr
12 Apr
6-8 wk
22 May
24 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
24 Apr – 8 May
1 Jun
2-4 wk
22 May
15 Jun
1 wk after
10 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Apr
17 Jun
3-4 wk
16 May
8 Jul
0 wk
17 May
28 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
17 Apr – 1 May
8 May
4-6 wk
29 May
5 Jun
2 wk after
Lemon balm
Melissa officinalis
7 – 21 Mar
13 May
8-10 wk
16 May
8 Jul
0 wk
10 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
17 May
11 Jul
0 wk
Wild chives
Allium schoenoprasum
21 Mar – 4 Apr
31 May
6-8 wk
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Spearmint
Mentha spicata
21 Feb – 21 Mar
17 May
8-12 wk
16 May
12 Jul
0 wk
10 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
16 May
31 Jul
0 wk
29 May
21 Jul
2 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
2 May
8-10 wk
18 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
7 – 21 Mar
7 May
8-10 wk
16 May
2 Jul
0 wk
Oregano
Origanum vulgare
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
10 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
17 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
14 Mar
10-14 wk
18 May
23 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
1 – 8 May
15 May
3-4 wk
29 May
5 Jun
2 wk after
Cornflower
Centaurea cyanus
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Statice
Limonium sinuatum
20 Mar – 3 Apr
11 Apr
8-10 wk
29 May
6 Jun
2 wk after
Sweet William
Dianthus barbatus
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
26 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
3 – 17 Apr
25 Apr
6-8 wk
29 May
6 Jun
2 wk after
22 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
1 – 15 Apr
30 Apr
6-8 wk
27 May
11 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
15 Apr – 13 May
14 May
4-8 wk
10 Jun
11 Jun
4 wk after
10 Jun
4 wk after
Foxglove
Digitalis purpurea
7 – 21 Mar
8-10 wk
16 May
0 wk
29 May
2 wk after
Busy lizzie
Impatiens walleriana
25 Mar – 22 Apr
26 May
8-12 wk
17 Jun
21 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
3 – 17 Apr
5 May
6-8 wk
29 May
16 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
2 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
6 Apr
8-10 wk
18 May
1 Jun
0 wk
Love in a mist
Nigella damascena
16 May
23 Jun
0 wk
17 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
27 Mar – 10 Apr
26 Apr
6-8 wk
22 May
7 Jun
1 wk after
5 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
6 Apr
8-12 wk
18 May
1 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
21 Feb – 21 Mar
18 Mar
8-12 wk
16 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
27 Feb – 27 Mar
16 Apr
8-12 wk
22 May
11 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
27 Mar – 10 Apr
30 Apr
6-8 wk
22 May
11 Jun
1 wk after
Corn poppy
Papaver rhoeas
16 May
8 Jul
0 wk
17 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
3 May
8-12 wk
16 May
28 Jun
0 wk
26 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
20 Mar – 3 Apr
2 May
8-10 wk
29 May
27 Jun
2 wk after
Sweet pea
Lathyrus odoratus
21 Mar – 11 Apr
28 May
5-8 wk
16 May
2 Jul
0 wk
Stock
Matthiola incana
21 Mar – 4 Apr
27 May
6-8 wk
16 May
8 Jul
0 wk
29 May
28 Jun
2 wk after
Wormwood
Artemisia absinthium
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
10 – 24 Apr
9 May
4-6 wk
22 May
6 Jun
1 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Mar
17 May
8-10 wk
16 May
12 Jul
0 wk
26 May
2 Jul
1 wk after
Petunia
Petunia
6 Mar – 3 Apr
11 Apr
8-12 wk
29 May
6 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
20 Apr
6-8 wk
18 May
1 Jun
0 wk
28 Jun
6 wk after
Common zinnia
Zinnia elegans
17 Apr – 1 May
8 May
4-6 wk
29 May
5 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
24 Apr – 8 May
15 May
3-5 wk
29 May
5 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
17 Apr – 1 May
14 May
4-6 wk
29 May
11 Jun
2 wk after
28 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
6 Mar – 3 Apr
16 May
8-12 wk
29 May
11 Jul
2 wk after
Bee balm
Monarda didyma
21 Feb – 21 Mar
13 Apr
8-12 wk
16 May
8 Jun
0 wk
10 Jun
4 wk after
Yarrow
Achillea millefolium
21 Mar – 4 Apr
1 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Safflower
Carthamus tinctorius
16 May
12 Jun
0 wk
17 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
30 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
4 – 18 Apr
31 May
4-6 wk
16 May
28 Jun
0 wk
29 May
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
27 Feb – 13 Mar
23 Mar
10-12 wk
22 May
1 Jun
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
22 May
3-4 wk
29 May
12 Jun
2 wk after
10 Jun
4 wk after
China aster
Callistephus chinensis
3 – 17 Apr
11 May
6-8 wk
29 May
22 Jun
2 wk after
28 Jun
6 wk after
Annual phlox
Phlox drummondii
27 Mar – 10 Apr
5 May
6-8 wk
22 May
16 Jun
1 wk after
28 Jun
6 wk after
Hollyhock
Alcea rosea
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Alpine delphinium
Delphinium elatum
21 Feb – 21 Mar
13 Apr
8-12 wk
16 May
8 Jun
0 wk
10 Jun
4 wk after
African marigold
Tagetes erecta
3 – 17 Apr
5 May
6-8 wk
29 May
16 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
1 May
6-8 wk
18 May
12 Jun
0 wk
28 Jun
6 wk after
Wood sage
Salvia nemorosa
7 – 21 Mar
3 Apr
8-10 wk
16 May
29 May
0 wk
10 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
20 Mar – 17 Apr
24 Apr
6-10 wk
29 May
5 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
16 May
8 Jul
0 wk
17 May
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
20 Mar – 3 Apr
11 Apr
8-10 wk
29 May
6 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after