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