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Method
Rel. frost
Last spring frost (0°C) 18 May Normal year · 20 years of data
Frost-free season 133 days 18 May – 28 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)
30 Mar – 13 Apr
13 Jun
5-7 wk
18 May
18 Jul
0 wk
19 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
25 Jun
4-6 wk
18 May
23 Jul
0 wk
19 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
6 Mar – 3 Apr
5 Apr
8-12 wk
29 May
31 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
8 Jun
5-7 wk
18 May
13 Jul
0 wk
18 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
10 – 17 May
30 May
3-4 wk
7 Jun
20 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
17 – 24 May
31 May
4-5 wk
21 Jun
28 Jun
5 wk after
30 Jun
6 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)
23 Feb – 23 Mar
19 Mar
8-12 wk
18 May
0 wk
31 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
3 Jun
0 wk
19 May
24 May
0 wk
Maize
Zea mays
Fleece
1 – 8 May
20 May
3-4 wk
29 May
10 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
2 Jul
3-4 wk
24 May
23 Jul
1 wk after
31 May
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
3 Jul
0 wk
18 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
8 Jun
5-7 wk
18 May
13 Jul
0 wk
18 May
3 Jul
0 wk
Potato
Solanum tuberosum
16 – 30 Apr
19 May
4-6 wk
28 May
16 Jun
1 wk after
28 May
6 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
18 Jun
5-7 wk
18 May
23 Jul
0 wk
19 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
10 – 17 May
20 Jun
3-4 wk
7 Jun
11 Jul
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Apr – 3 May
24 May
3-4 wk
24 May
14 Jun
1 wk after
31 May
4 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
7 Jul
3-4 wk
18 May
28 Jul
0 wk
19 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
26 May
2-4 wk
18 May
9 Jun
0 wk
18 May
30 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
3 Jun
0 wk
19 May
24 May
0 wk
Spinach
Spinacia oleracea
20 – 27 Apr
22 Jul
3-4 wk
18 May
12 Aug
0 wk
15 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
12 – 26 Jun
4-6 wk
24 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
3 – 17 Apr
29 Apr
6-8 wk
29 May
10 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
10 – 24 May
6 Jun
2-4 wk
7 Jun
20 Jun
3 wk after
30 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
22 Jun
3-4 wk
18 May
13 Jul
0 wk
19 May
3 Jul
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
26 Apr – 10 May
29 May
4-6 wk
7 Jun
26 Jun
3 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
18 May
8-10 wk
18 May
13 Jul
0 wk
12 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
19 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
1 Jun
6-8 wk
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
18 May
8-12 wk
18 May
13 Jul
0 wk
12 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
18 May
12 Aug
0 wk
31 May
2 Aug
2 wk after
Garden sage
Salvia officinalis
15 – 29 Mar
3 May
8-10 wk
24 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
9 – 23 Mar
8 May
8-10 wk
18 May
3 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
12 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
19 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
15 Feb – 15 Mar
4 Apr
10-14 wk
24 May
13 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
10 – 17 May
5 Jun
3-4 wk
7 Jun
26 Jun
3 wk after
Cornflower
Centaurea cyanus
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Statice
Limonium sinuatum
29 Mar – 12 Apr
23 Apr
8-10 wk
7 Jun
18 Jun
3 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
12 – 26 Apr
7 May
6-8 wk
7 Jun
18 Jun
3 wk after
24 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
7 – 21 Apr
13 May
6-8 wk
2 Jun
24 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
17 Apr – 15 May
27 May
4-8 wk
12 Jun
24 Jun
4 wk after
12 Jun
14 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
29 Mar – 26 Apr
16 Jun
8-12 wk
21 Jun
11 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 Apr
17 May
6-8 wk
7 Jun
28 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
26 Apr – 10 May
29 Apr
4-6 wk
7 Jun
3 wk after
Chinese lantern
Physalis alkekengi
15 – 29 Mar
18 Apr
8-10 wk
24 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
18 May
28 Jun
0 wk
19 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
12 – 26 Apr
27 Apr
6-8 wk
7 Jun
8 Jun
3 wk after
24 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
1 – 29 Mar
18 Apr
8-12 wk
24 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
6 Mar – 3 Apr
19 Mar
8-12 wk
29 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
15 Mar – 12 Apr
21 Apr
8-12 wk
7 Jun
16 Jun
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
12 – 26 Apr
5 May
6-8 wk
7 Jun
16 Jun
3 wk after
Corn poppy
Papaver rhoeas
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
8 May
8-12 wk
18 May
3 Jul
0 wk
28 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
12 – 26 Apr
3 May
8-10 wk
21 Jun
28 Jun
5 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
29 May
5-8 wk
18 May
3 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
1 Jun
6-8 wk
18 May
13 Jul
0 wk
31 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
0 wk
31 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
26 Apr – 10 May
14 May
4-6 wk
7 Jun
11 Jun
3 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
18 May
8-10 wk
18 May
13 Jul
0 wk
28 May
3 Jul
1 wk after
Petunia
Petunia
15 Mar – 12 Apr
23 Apr
8-12 wk
7 Jun
18 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
29 Mar – 12 Apr
2 May
6-8 wk
24 May
13 Jun
1 wk after
30 Jun
6 wk after
Common zinnia
Zinnia elegans
26 Apr – 10 May
29 May
4-6 wk
7 Jun
26 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
3 – 17 May
5 Jun
3-5 wk
7 Jun
26 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
26 Apr – 10 May
27 May
4-6 wk
7 Jun
24 Jun
3 wk after
30 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
29 Mar – 26 Apr
21 May
8-12 wk
21 Jun
16 Jul
5 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
18 Apr
8-12 wk
18 May
13 Jun
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
2 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
13 Jun
0 wk
19 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
2 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
5 Jun
4-6 wk
18 May
3 Jul
0 wk
31 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
15 – 29 Mar
26 Mar
10-12 wk
7 Jun
3 wk after
Sunflower
Helianthus annuus
10 – 17 May
12 Jun
3-4 wk
7 Jun
3 Jul
3 wk after
12 Jun
23 Jun
4 wk after
China aster
Callistephus chinensis
12 – 26 Apr
1 Jun
6-8 wk
7 Jun
13 Jul
3 wk after
30 Jun
3 Jul
6 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
17 May
6-8 wk
29 May
28 Jun
2 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
18 Apr
8-12 wk
18 May
13 Jun
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
12 – 26 Apr
17 May
6-8 wk
7 Jun
28 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
29 Mar – 12 Apr
22 May
6-8 wk
24 May
3 Jul
1 wk after
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
8 Apr
8-10 wk
18 May
3 Jun
0 wk
12 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
29 Mar – 26 Apr
15 May
6-10 wk
7 Jun
26 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
29 Mar – 12 Apr
3 May
8-10 wk
7 Jun
28 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
0 wk
31 May
3 Jun
2 wk after