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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
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
16 Jun
5-7 wk
18 May
21 Jul
0 wk
22 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
28 Jun
4-6 wk
18 May
26 Jul
0 wk
22 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
1 – 29 Mar
6 Apr
8-12 wk
24 May
1 Jun
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
11 Jun
5-7 wk
18 May
16 Jul
0 wk
18 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
3 – 10 May
31 May
3-4 wk
31 May
21 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
15 – 22 May
2 Jun
4-5 wk
19 Jun
30 Jun
5 wk after
6 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
23 Mar
8-12 wk
18 May
18 May
0 wk
8 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
7 Jun
1 wk after
22 May
28 May
1 wk after
Maize
Zea mays
Fleece
26 Apr – 3 May
21 May
3-4 wk
24 May
11 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
5 Jul
3-4 wk
20 May
26 Jul
0 wk
8 Jun
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
6 Jul
0 wk
18 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
11 Jun
5-7 wk
18 May
16 Jul
0 wk
18 May
6 Jul
0 wk
Potato
Solanum tuberosum
22 Apr – 6 May
21 May
4-6 wk
3 Jun
18 Jun
2 wk after
3 Jun
8 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
21 Jun
5-7 wk
18 May
26 Jul
0 wk
22 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
22 – 29 May
5 Jun
3-4 wk
19 Jun
26 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
31 May
3-4 wk
20 May
21 Jun
0 wk
8 Jun
11 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
23 Jun
4-6 wk
18 May
21 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
10 Jul
3-4 wk
18 May
31 Jul
0 wk
22 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
23 Jun
4-6 wk
18 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
30 May
2-4 wk
18 May
13 Jun
0 wk
18 May
3 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
7 Jun
1 wk after
22 May
28 May
1 wk after
Spinach
Spinacia oleracea
20 – 27 Apr
25 Jul
3-4 wk
18 May
15 Aug
0 wk
14 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
19 Jun – 3 Jul
4-6 wk
31 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
29 Mar – 12 Apr
30 Apr
6-8 wk
24 May
11 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 May
7 Jun
2-4 wk
31 May
21 Jun
2 wk after
6 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
23 Jun
4-6 wk
18 May
21 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
25 Jun
3-4 wk
18 May
16 Jul
0 wk
22 May
6 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
19 Apr – 3 May
31 May
4-6 wk
31 May
28 Jun
2 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
21 May
8-10 wk
18 May
16 Jul
0 wk
22 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
22 May
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
4 Jun
6-8 wk
18 May
16 Jul
0 wk
22 May
6 Jul
1 wk after
Spearmint
Mentha spicata
23 Feb – 23 Mar
21 May
8-12 wk
18 May
16 Jul
0 wk
22 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
18 May
15 Aug
0 wk
8 Jun
5 Aug
3 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
6 May
8-10 wk
20 May
1 Jul
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
11 May
8-10 wk
18 May
6 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
25 May
6-8 wk
18 May
6 Jul
0 wk
22 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
25 May
6-8 wk
18 May
6 Jul
0 wk
22 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
4 Apr
10-14 wk
20 May
13 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
3 – 10 May
7 Jun
3-4 wk
31 May
28 Jun
2 wk after
Cornflower
Centaurea cyanus
18 May
16 Jul
0 wk
22 May
6 Jul
1 wk after
Statice
Limonium sinuatum
22 Mar – 5 Apr
27 Apr
8-10 wk
31 May
22 Jun
2 wk after
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
3 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
5 – 19 Apr
11 May
6-8 wk
31 May
22 Jun
2 wk after
31 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
3 – 17 Apr
18 May
6-8 wk
29 May
29 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Apr – 25 May
1 Jun
4-8 wk
22 Jun
29 Jun
5 wk after
22 Jun
5 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
8 Jun
3 wk after
Busy lizzie
Impatiens walleriana
27 Mar – 24 Apr
18 Jun
8-12 wk
19 Jun
13 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
5 – 19 Apr
21 May
6-8 wk
31 May
2 Jul
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
1 May
4-6 wk
31 May
2 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Mar
21 Apr
8-10 wk
20 May
16 Jun
0 wk
Love in a mist
Nigella damascena
18 May
1 Jul
0 wk
22 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
5 – 19 Apr
1 May
6-8 wk
31 May
12 Jun
2 wk after
31 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
21 Apr
8-12 wk
20 May
16 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
1 – 29 Mar
22 Mar
8-12 wk
24 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
8 Mar – 5 Apr
23 Apr
8-12 wk
31 May
18 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
5 – 19 Apr
7 May
6-8 wk
31 May
18 Jun
2 wk after
Corn poppy
Papaver rhoeas
18 May
16 Jul
0 wk
22 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
11 May
8-12 wk
18 May
6 Jul
0 wk
3 Jun
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
10 – 24 Apr
7 May
8-10 wk
19 Jun
2 Jul
5 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
1 Jun
5-8 wk
18 May
6 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
4 Jun
6-8 wk
18 May
16 Jul
0 wk
8 Jun
6 Jul
3 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
5 May
6-8 wk
18 May
16 Jun
0 wk
8 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
19 Apr – 3 May
16 May
4-6 wk
31 May
13 Jun
2 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
21 May
8-10 wk
18 May
16 Jul
0 wk
3 Jun
6 Jul
2 wk after
Petunia
Petunia
8 Mar – 5 Apr
27 Apr
8-12 wk
31 May
22 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
6 Jul
7 wk after
Common zinnia
Zinnia elegans
19 Apr – 3 May
31 May
4-6 wk
31 May
28 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
26 Apr – 10 May
7 Jun
3-5 wk
31 May
28 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
19 Apr – 3 May
1 Jun
4-6 wk
31 May
29 Jun
2 wk after
6 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
27 Mar – 24 Apr
23 May
8-12 wk
19 Jun
18 Jul
5 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
21 Apr
8-12 wk
18 May
16 Jun
0 wk
22 Jun
5 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
5 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Safflower
Carthamus tinctorius
18 May
16 Jun
0 wk
22 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
25 May
6-8 wk
18 May
6 Jul
0 wk
30 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
8 Jun
4-6 wk
18 May
6 Jul
0 wk
8 Jun
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
8 – 22 Mar
31 Mar
10-12 wk
31 May
9 Jun
2 wk after
Sunflower
Helianthus annuus
3 – 10 May
12 Jun
3-4 wk
31 May
3 Jul
2 wk after
22 Jun
23 Jun
5 wk after
China aster
Callistephus chinensis
5 – 19 Apr
1 Jun
6-8 wk
31 May
13 Jul
2 wk after
6 Jul
7 wk after
Annual phlox
Phlox drummondii
29 Mar – 12 Apr
21 May
6-8 wk
24 May
2 Jul
1 wk after
6 Jul
7 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
21 Apr
8-12 wk
18 May
16 Jun
0 wk
22 Jun
5 wk after
African marigold
Tagetes erecta
5 – 19 Apr
21 May
6-8 wk
31 May
2 Jul
2 wk after
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
22 May
6-8 wk
20 May
3 Jul
0 wk
6 Jul
7 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
11 Apr
8-10 wk
18 May
6 Jun
0 wk
22 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
22 Mar – 19 Apr
17 May
6-10 wk
31 May
28 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
18 May
16 Jul
0 wk
22 May
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
5 May
8-10 wk
31 May
30 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
5 May
6-8 wk
18 May
16 Jun
0 wk
8 Jun
3 wk after