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Method
Rel. frost
Last spring frost (0°C) 13 May Frost 3 of 4 years · 20 years of data
Frost-free season 130 days 13 May – 20 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)
25 Mar – 8 Apr
13 Jun
5-7 wk
13 May
18 Jul
0 wk
14 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
1 – 15 Apr
25 Jun
4-6 wk
13 May
23 Jul
0 wk
14 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
1 – 29 Mar
1 Apr
8-12 wk
24 May
27 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
25 Mar – 8 Apr
8 Jun
5-7 wk
13 May
13 Jul
0 wk
13 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
5 – 12 May
26 May
3-4 wk
2 Jun
16 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
Fleece
28 Apr – 5 May
2 Jun
4-5 wk
2 Jun
30 Jun
3 wk after
7 Jun
20 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
18 Feb – 18 Mar
14 Mar
8-12 wk
13 May
0 wk
26 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 May
29 May
0 wk
14 May
19 May
0 wk
Maize
Zea mays
Fleece
26 Apr – 3 May
16 May
3-4 wk
24 May
6 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
21 – 28 Apr
29 Jun
3-4 wk
19 May
20 Jul
1 wk after
26 May
10 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
13 May
3 Jul
0 wk
13 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
25 Mar – 8 Apr
8 Jun
5-7 wk
13 May
13 Jul
0 wk
13 May
3 Jul
0 wk
Potato
Solanum tuberosum
11 – 25 Apr
14 May
4-6 wk
23 May
11 Jun
1 wk after
23 May
1 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
25 Mar – 8 Apr
18 Jun
5-7 wk
13 May
23 Jul
0 wk
14 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
5 – 12 May
14 Jun
3-4 wk
2 Jun
5 Jul
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
21 – 28 Apr
18 May
3-4 wk
19 May
8 Jun
1 wk after
26 May
29 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Lettuce
Lactuca sativa
15 – 22 Apr
7 Jul
3-4 wk
13 May
28 Jul
0 wk
14 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Apr
19 May
2-4 wk
13 May
2 Jun
0 wk
13 May
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
14 May
29 May
0 wk
14 May
19 May
0 wk
Spinach
Spinacia oleracea
15 – 22 Apr
22 Jul
3-4 wk
13 May
12 Aug
0 wk
10 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
7 – 21 Jun
4-6 wk
19 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
29 Mar – 12 Apr
25 Apr
6-8 wk
24 May
6 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
5 – 19 May
2 Jun
2-4 wk
2 Jun
16 Jun
3 wk after
25 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Garden pea
Pisum sativum
15 – 22 Apr
22 Jun
3-4 wk
13 May
13 Jul
0 wk
14 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
21 Apr – 5 May
23 May
4-6 wk
2 Jun
20 Jun
3 wk after
Lemon balm
Melissa officinalis
4 – 18 Mar
18 May
8-10 wk
13 May
13 Jul
0 wk
7 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
14 May
20 Jul
0 wk
Wild chives
Allium schoenoprasum
18 Mar – 1 Apr
1 Jun
6-8 wk
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Spearmint
Mentha spicata
18 Feb – 18 Mar
18 May
8-12 wk
13 May
13 Jul
0 wk
7 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
13 May
9 Aug
0 wk
26 May
30 Jul
2 wk after
Garden sage
Salvia officinalis
10 – 24 Mar
3 May
8-10 wk
19 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
4 – 18 Mar
8 May
8-10 wk
13 May
3 Jul
0 wk
Oregano
Origanum vulgare
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
7 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
14 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
10 Feb – 10 Mar
29 Mar
10-14 wk
19 May
7 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
5 – 12 May
30 May
3-4 wk
2 Jun
20 Jun
3 wk after
Cornflower
Centaurea cyanus
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Statice
Limonium sinuatum
24 Mar – 7 Apr
17 Apr
8-10 wk
2 Jun
12 Jun
3 wk after
Sweet William
Dianthus barbatus
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
23 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
1 May
6-8 wk
2 Jun
12 Jun
3 wk after
19 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
2 – 16 Apr
8 May
6-8 wk
28 May
19 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
22 May
4-8 wk
7 Jun
19 Jun
4 wk after
7 Jun
9 Jun
4 wk after
Foxglove
Digitalis purpurea
4 – 18 Mar
8-10 wk
13 May
0 wk
26 May
2 wk after
Busy lizzie
Impatiens walleriana
24 Mar – 21 Apr
10 Jun
8-12 wk
16 Jun
5 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
11 May
6-8 wk
2 Jun
22 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
23 Apr
4-6 wk
2 Jun
3 wk after
Chinese lantern
Physalis alkekengi
10 – 24 Mar
15 Apr
8-10 wk
19 May
10 Jun
1 wk after
Love in a mist
Nigella damascena
13 May
28 Jun
0 wk
14 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
29 Mar – 12 Apr
30 Apr
6-8 wk
24 May
11 Jun
2 wk after
2 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
24 Feb – 24 Mar
15 Apr
8-12 wk
19 May
10 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
1 – 29 Mar
19 Mar
8-12 wk
24 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
10 Mar – 7 Apr
15 Apr
8-12 wk
2 Jun
10 Jun
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
7 – 21 Apr
29 Apr
6-8 wk
2 Jun
10 Jun
3 wk after
Corn poppy
Papaver rhoeas
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
18 Feb – 18 Mar
8 May
8-12 wk
13 May
3 Jul
0 wk
23 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
24 Mar – 7 Apr
6 May
8-10 wk
2 Jun
1 Jul
3 wk after
Sweet pea
Lathyrus odoratus
18 Mar – 8 Apr
29 May
5-8 wk
13 May
3 Jul
0 wk
Stock
Matthiola incana
18 Mar – 1 Apr
1 Jun
6-8 wk
13 May
13 Jul
0 wk
26 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
18 Mar – 1 Apr
2 May
6-8 wk
13 May
13 Jun
0 wk
26 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
21 Apr – 5 May
8 May
4-6 wk
2 Jun
5 Jun
3 wk after
Garden pansy
Viola × wittrockiana
4 – 18 Mar
18 May
8-10 wk
13 May
13 Jul
0 wk
23 May
3 Jul
1 wk after
Petunia
Petunia
10 Mar – 7 Apr
17 Apr
8-12 wk
2 Jun
12 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
24 Mar – 7 Apr
29 Apr
6-8 wk
19 May
10 Jun
1 wk after
25 Jun
6 wk after
Common zinnia
Zinnia elegans
21 Apr – 5 May
23 May
4-6 wk
2 Jun
20 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
28 Apr – 12 May
30 May
3-5 wk
2 Jun
20 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
22 May
4-6 wk
2 Jun
19 Jun
3 wk after
25 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
24 Mar – 21 Apr
15 May
8-12 wk
16 Jun
10 Jul
5 wk after
Bee balm
Monarda didyma
18 Feb – 18 Mar
18 Apr
8-12 wk
13 May
13 Jun
0 wk
7 Jun
4 wk after
Yarrow
Achillea millefolium
18 Mar – 1 Apr
2 Apr
6-8 wk
13 May
14 May
0 wk
26 May
2 wk after
Safflower
Carthamus tinctorius
13 May
13 Jun
0 wk
14 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
27 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
1 – 15 Apr
5 Jun
4-6 wk
13 May
3 Jul
0 wk
26 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
1 – 15 Mar
30 Mar
10-12 wk
24 May
8 Jun
2 wk after
Sunflower
Helianthus annuus
5 – 12 May
6 Jun
3-4 wk
2 Jun
27 Jun
3 wk after
7 Jun
17 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
26 May
6-8 wk
2 Jun
7 Jul
3 wk after
25 Jun
27 Jun
6 wk after
Annual phlox
Phlox drummondii
29 Mar – 12 Apr
11 May
6-8 wk
24 May
22 Jun
2 wk after
25 Jun
6 wk after
Hollyhock
Alcea rosea
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
26 May
2 wk after
Alpine delphinium
Delphinium elatum
18 Feb – 18 Mar
18 Apr
8-12 wk
13 May
13 Jun
0 wk
7 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Apr
11 May
6-8 wk
2 Jun
22 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
24 Mar – 7 Apr
16 May
6-8 wk
19 May
27 Jun
1 wk after
25 Jun
6 wk after
Wood sage
Salvia nemorosa
4 – 18 Mar
8 Apr
8-10 wk
13 May
3 Jun
0 wk
7 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
24 Mar – 21 Apr
9 May
6-10 wk
2 Jun
20 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
27 Apr
8-10 wk
2 Jun
22 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
18 Mar – 1 Apr
2 May
6-8 wk
13 May
13 Jun
0 wk
26 May
3 Jun
2 wk after