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Method
Rel. frost
Last spring frost (0°C) 21 May Normal year · 20 years of data
Frost-free season 103 days 21 May – 1 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)
2 – 16 Apr
11 Jun
5-7 wk
21 May
16 Jul
0 wk
22 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
23 Jun
4-6 wk
21 May
21 Jul
0 wk
22 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
4 Mar – 1 Apr
30 Mar
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
6 – 13 May
24 May
3-4 wk
3 Jun
14 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
30 May
4-5 wk
3 Jun
27 Jun
2 wk after
15 Jun
17 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Feb – 26 Mar
17 Mar
8-12 wk
21 May
0 wk
3 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
1 Jun
0 wk
22 May
22 May
0 wk
Maize
Zea mays
Fleece
29 Apr – 6 May
14 May
3-4 wk
27 May
4 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
26 Jun
3-4 wk
23 May
17 Jul
0 wk
3 Jun
7 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
1 Jul
0 wk
21 May
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
16 May
4-6 wk
31 May
13 Jun
1 wk after
31 May
3 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
16 Jun
5-7 wk
21 May
21 Jul
0 wk
22 May
11 Jul
0 wk
Pumpkin
Cucurbita pepo
25 May – 1 Jun
29 May
3-4 wk
22 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
25 May
3-4 wk
23 May
15 Jun
0 wk
3 Jun
5 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
5 Jul
3-4 wk
21 May
26 Jul
0 wk
22 May
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
21 May
2-4 wk
21 May
4 Jun
0 wk
21 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
1 Jun
0 wk
22 May
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
20 Jul
3-4 wk
21 May
10 Aug
0 wk
18 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
1 – 15 Apr
23 Apr
6-8 wk
27 May
4 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
6 – 20 May
31 May
2-4 wk
3 Jun
14 Jun
2 wk after
3 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
20 Jun
3-4 wk
21 May
11 Jul
0 wk
22 May
1 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
22 Apr – 6 May
23 May
4-6 wk
3 Jun
20 Jun
2 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
16 May
8-10 wk
21 May
11 Jul
0 wk
15 Jun
1 Jul
4 wk after
Dill
Anethum graveolens
22 May
17 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
16 May
8-12 wk
21 May
11 Jul
0 wk
15 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
6 Aug
0 wk
3 Jun
27 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
1 May
8-10 wk
23 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
6 May
8-10 wk
21 May
1 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
15 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
22 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
14 Mar
10-14 wk
23 May
23 May
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
6 – 13 May
30 May
3-4 wk
3 Jun
20 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Statice
Limonium sinuatum
25 Mar – 8 Apr
16 Apr
8-10 wk
3 Jun
11 Jun
2 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
8 – 22 Apr
30 Apr
6-8 wk
3 Jun
11 Jun
2 wk after
27 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
8 May
6-8 wk
1 Jun
19 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Apr – 18 May
22 May
4-8 wk
15 Jun
19 Jun
4 wk after
15 Jun
4 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
30 Mar – 27 Apr
10 Jun
8-12 wk
22 Jun
5 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Apr
10 May
6-8 wk
3 Jun
21 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
23 Apr
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
12 Apr
8-10 wk
23 May
7 Jun
0 wk
Love in a mist
Nigella damascena
21 May
26 Jun
0 wk
22 May
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
2 May
6-8 wk
27 May
13 Jun
1 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
12 Apr
8-12 wk
23 May
7 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
26 Feb – 26 Mar
17 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
11 Mar – 8 Apr
15 Apr
8-12 wk
3 Jun
10 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
8 – 22 Apr
29 Apr
6-8 wk
3 Jun
10 Jun
2 wk after
Corn poppy
Papaver rhoeas
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
6 May
8-12 wk
21 May
1 Jul
0 wk
31 May
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
13 – 27 Apr
26 Apr
8-10 wk
22 Jun
5 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
27 May
5-8 wk
21 May
1 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
0 wk
3 Jun
1 Jul
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
22 Apr – 6 May
8 May
4-6 wk
3 Jun
5 Jun
2 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
16 May
8-10 wk
21 May
11 Jul
0 wk
31 May
1 Jul
1 wk after
Petunia
Petunia
11 Mar – 8 Apr
16 Apr
8-12 wk
3 Jun
11 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
26 Apr
6-8 wk
23 May
7 Jun
0 wk
3 Jul
6 wk after
Common zinnia
Zinnia elegans
22 Apr – 6 May
23 May
4-6 wk
3 Jun
20 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
29 Apr – 13 May
30 May
3-5 wk
3 Jun
20 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
22 Apr – 6 May
22 May
4-6 wk
3 Jun
19 Jun
2 wk after
3 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
15 May
8-12 wk
22 Jun
10 Jul
5 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
16 Apr
8-12 wk
21 May
11 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
31 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
11 Jun
0 wk
22 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
5 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
3 Jun
4-6 wk
21 May
1 Jul
0 wk
3 Jun
21 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
4 – 18 Mar
31 Mar
10-12 wk
27 May
9 Jun
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
22 May
3-4 wk
3 Jun
12 Jun
2 wk after
15 Jun
4 wk after
China aster
Callistephus chinensis
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
2 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
10 May
6-8 wk
27 May
21 Jun
1 wk after
3 Jul
6 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
16 Apr
8-12 wk
21 May
11 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
8 – 22 Apr
10 May
6-8 wk
3 Jun
21 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
1 May
6-8 wk
23 May
12 Jun
0 wk
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
6 Apr
8-10 wk
21 May
1 Jun
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
25 Mar – 22 Apr
9 May
6-10 wk
3 Jun
20 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
10 Jul
0 wk
22 May
30 Jun
0 wk
Painted tongue
Salpiglossis sinuata
25 Mar – 8 Apr
10 Apr
8-10 wk
3 Jun
5 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after