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Method
Rel. frost
Last spring frost (0°C) 15 May Frost 3 of 4 years · 20 years of data
Frost-free season 123 days 15 May – 15 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)
27 Mar – 10 Apr
13 Jun
5-7 wk
15 May
18 Jul
0 wk
16 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
25 Jun
4-6 wk
15 May
23 Jul
0 wk
16 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
26 Feb – 26 Mar
24 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
0 wk
15 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
30 Apr – 7 May
18 May
3-4 wk
28 May
8 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
23 – 30 Apr
1 Jun
4-5 wk
28 May
29 Jun
2 wk after
9 Jun
19 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)
20 Feb – 20 Mar
14 Mar
8-12 wk
15 May
0 wk
28 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 May
29 May
0 wk
16 May
19 May
0 wk
Maize
Zea mays
Fleece
23 – 30 Apr
8 May
3-4 wk
21 May
29 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
28 Jun
3-4 wk
17 May
19 Jul
0 wk
28 May
9 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
3 Jul
0 wk
15 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
0 wk
15 May
3 Jul
0 wk
Potato
Solanum tuberosum
13 – 27 Apr
14 May
4-6 wk
25 May
11 Jun
1 wk after
25 May
1 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
18 Jun
5-7 wk
15 May
23 Jul
0 wk
16 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
30 Apr – 7 May
12 Jun
3-4 wk
28 May
3 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
17 May
3-4 wk
17 May
7 Jun
0 wk
28 May
28 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
20 Jun
4-6 wk
15 May
18 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
7 Jul
3-4 wk
15 May
28 Jul
0 wk
16 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
20 Jun
4-6 wk
15 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
19 May
2-4 wk
15 May
2 Jun
0 wk
15 May
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 May
29 May
0 wk
16 May
19 May
0 wk
Spinach
Spinacia oleracea
17 – 24 Apr
22 Jul
3-4 wk
15 May
12 Aug
0 wk
12 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
26 Mar – 9 Apr
17 Apr
6-8 wk
21 May
29 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 Apr – 14 May
25 May
2-4 wk
28 May
8 Jun
2 wk after
27 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
20 Jun
4-6 wk
15 May
18 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
22 Jun
3-4 wk
15 May
13 Jul
0 wk
16 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
16 – 30 Apr
21 May
4-6 wk
28 May
18 Jun
2 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
18 May
8-10 wk
15 May
13 Jul
0 wk
9 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
16 May
19 Jul
0 wk
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
1 Jun
6-8 wk
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Spearmint
Mentha spicata
20 Feb – 20 Mar
18 May
8-12 wk
15 May
13 Jul
0 wk
9 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
15 May
8 Aug
0 wk
28 May
29 Jul
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
3 May
8-10 wk
17 May
28 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
8 May
8-10 wk
15 May
3 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
22 May
6-8 wk
15 May
3 Jul
0 wk
9 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
22 May
6-8 wk
15 May
3 Jul
0 wk
16 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
25 Mar
10-14 wk
17 May
3 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
30 Apr – 7 May
28 May
3-4 wk
28 May
18 Jun
2 wk after
Cornflower
Centaurea cyanus
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Statice
Limonium sinuatum
19 Mar – 2 Apr
17 Apr
8-10 wk
28 May
12 Jun
2 wk after
Sweet William
Dianthus barbatus
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
25 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 Apr
1 May
6-8 wk
28 May
12 Jun
2 wk after
21 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
6 May
6-8 wk
26 May
17 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
14 Apr – 12 May
20 May
4-8 wk
9 Jun
17 Jun
4 wk after
9 Jun
4 wk after
Foxglove
Digitalis purpurea
6 – 20 Mar
8-10 wk
15 May
0 wk
28 May
2 wk after
Busy lizzie
Impatiens walleriana
24 Mar – 21 Apr
8 Jun
8-12 wk
16 Jun
3 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 Apr
11 May
6-8 wk
28 May
22 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
21 Apr
4-6 wk
28 May
2 wk after
Chinese lantern
Physalis alkekengi
8 – 22 Mar
14 Apr
8-10 wk
17 May
9 Jun
0 wk
Love in a mist
Nigella damascena
15 May
28 Jun
0 wk
16 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
1 wk after
4 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
22 Feb – 22 Mar
14 Apr
8-12 wk
17 May
9 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
26 Feb – 26 Mar
19 Mar
8-12 wk
21 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
5 Mar – 2 Apr
13 Apr
8-12 wk
28 May
8 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
2 – 16 Apr
27 Apr
6-8 wk
28 May
8 Jun
2 wk after
Corn poppy
Papaver rhoeas
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
20 Feb – 20 Mar
8 May
8-12 wk
15 May
3 Jul
0 wk
25 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
19 Mar – 2 Apr
6 May
8-10 wk
28 May
1 Jul
2 wk after
Sweet pea
Lathyrus odoratus
20 Mar – 10 Apr
29 May
5-8 wk
15 May
3 Jul
0 wk
Stock
Matthiola incana
20 Mar – 3 Apr
1 Jun
6-8 wk
15 May
13 Jul
0 wk
28 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
20 Mar – 3 Apr
2 May
6-8 wk
15 May
13 Jun
0 wk
28 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
16 – 30 Apr
6 May
4-6 wk
28 May
3 Jun
2 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
18 May
8-10 wk
15 May
13 Jul
0 wk
25 May
3 Jul
1 wk after
Petunia
Petunia
5 Mar – 2 Apr
17 Apr
8-12 wk
28 May
12 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
22 Mar – 5 Apr
28 Apr
6-8 wk
17 May
9 Jun
0 wk
27 Jun
6 wk after
Common zinnia
Zinnia elegans
16 – 30 Apr
21 May
4-6 wk
28 May
18 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
23 Apr – 7 May
28 May
3-5 wk
28 May
18 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 Apr
20 May
4-6 wk
28 May
17 Jun
2 wk after
27 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
24 Mar – 21 Apr
13 May
8-12 wk
16 Jun
8 Jul
5 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
18 Apr
8-12 wk
15 May
13 Jun
0 wk
9 Jun
4 wk after
Yarrow
Achillea millefolium
20 Mar – 3 Apr
2 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Safflower
Carthamus tinctorius
15 May
13 Jun
0 wk
16 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
20 Mar – 3 Apr
22 May
6-8 wk
15 May
3 Jul
0 wk
29 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
3 – 17 Apr
5 Jun
4-6 wk
15 May
3 Jul
0 wk
28 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
26 Feb – 12 Mar
27 Mar
10-12 wk
21 May
5 Jun
1 wk after
Sunflower
Helianthus annuus
30 Apr – 7 May
2 Jun
3-4 wk
28 May
23 Jun
2 wk after
9 Jun
13 Jun
4 wk after
China aster
Callistephus chinensis
2 – 16 Apr
22 May
6-8 wk
28 May
3 Jul
2 wk after
27 Jun
6 wk after
Annual phlox
Phlox drummondii
26 Mar – 9 Apr
11 May
6-8 wk
21 May
22 Jun
1 wk after
27 Jun
6 wk after
Hollyhock
Alcea rosea
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
18 Apr
8-12 wk
15 May
13 Jun
0 wk
9 Jun
4 wk after
African marigold
Tagetes erecta
2 – 16 Apr
11 May
6-8 wk
28 May
22 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
22 Mar – 5 Apr
12 May
6-8 wk
17 May
23 Jun
0 wk
27 Jun
6 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
8 Apr
8-10 wk
15 May
3 Jun
0 wk
9 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
19 Mar – 16 Apr
7 May
6-10 wk
28 May
18 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
19 Mar – 2 Apr
25 Apr
8-10 wk
28 May
20 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
20 Mar – 3 Apr
2 May
6-8 wk
15 May
13 Jun
0 wk
28 May
3 Jun
2 wk after