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Method
Rel. frost
Last spring frost (0°C) 20 May Normal year · 20 years of data
Frost-free season 139 days 20 May – 6 Oct
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
9 Jun
5-7 wk
20 May
14 Jul
0 wk
21 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
21 Jun
4-6 wk
20 May
19 Jul
0 wk
21 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
3 – 31 Mar
8-12 wk
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
4 Jun
5-7 wk
20 May
9 Jul
0 wk
20 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
28 Apr – 5 May
5 Jun
3-4 wk
26 May
26 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
17 – 24 May
1 Jun
4-5 wk
21 Jun
29 Jun
5 wk after
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
25 Feb – 25 Mar
12 Mar
8-12 wk
20 May
0 wk
26 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Greenhouse
11 May
5 Jun
1 wk before
11 May
26 May
1 wk before
Maize
Zea mays
Greenhouse
22 – 29 Apr
26 May
3-4 wk
20 May
16 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
28 Jun
3-4 wk
22 May
19 Jul
0 wk
2 Jun
9 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
4 Jun
5-7 wk
20 May
9 Jul
0 wk
20 May
29 Jun
0 wk
Potato
Solanum tuberosum
Fleece
9 – 23 Apr
12 May
4-6 wk
21 May
9 Jun
0 wk
21 May
30 May
0 wk
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
5 – 12 May
10 Jun
3-4 wk
2 Jun
1 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Apr – 1 May
5 May
3-4 wk
22 May
26 May
0 wk
2 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
16 Jun
4-6 wk
20 May
14 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
16 Jun
4-6 wk
20 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Greenhouse
6 – 20 Apr
26 May
2-4 wk
4 May
9 Jun
2 wk before
4 May
30 May
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Greenhouse
11 May
5 Jun
1 wk before
11 May
26 May
1 wk before
Spinach
Spinacia oleracea
22 – 29 Apr
18 Jul
3-4 wk
20 May
8 Aug
0 wk
17 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
14 – 28 Jun
4-6 wk
26 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
28 Apr – 12 May
12 Jun
2-4 wk
26 May
26 Jun
1 wk after
14 Jun
16 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
16 Jun
4-6 wk
20 May
14 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
Greenhouse
14 – 28 Apr
3 Jun
4-6 wk
26 May
1 Jul
1 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
19 Jul
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
28 May
6-8 wk
20 May
9 Jul
0 wk
21 May
29 Jun
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
14 May
8-12 wk
20 May
9 Jul
0 wk
14 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
20 May
8 Aug
0 wk
2 Jun
29 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
29 Apr
8-10 wk
22 May
24 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
4 May
8-10 wk
20 May
29 Jun
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
18 May
6-8 wk
20 May
29 Jun
0 wk
14 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
18 May
6-8 wk
20 May
29 Jun
0 wk
21 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
13 Feb – 13 Mar
31 Mar
10-14 wk
22 May
9 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
Greenhouse
28 Apr – 5 May
10 Jun
3-4 wk
26 May
1 Jul
1 wk after
Cornflower
Centaurea cyanus
20 May
9 Jul
0 wk
21 May
29 Jun
0 wk
Statice
Limonium sinuatum
Fleece
17 – 31 Mar
1 May
8-10 wk
26 May
26 Jun
1 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
Fleece
31 Mar – 14 Apr
15 May
6-8 wk
26 May
26 Jun
1 wk after
9 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
5 – 19 Apr
10 May
6-8 wk
31 May
21 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
7 Apr – 5 May
1 Jun
4-8 wk
2 Jun
29 Jun
2 wk after
2 Jun
19 Jun
2 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
2 Jun
2 wk after
Busy lizzie
Impatiens walleriana
29 Mar – 26 Apr
6 Jun
8-12 wk
21 Jun
1 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
16 May
6-8 wk
2 Jun
27 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Mar
14 Apr
8-10 wk
22 May
9 Jun
0 wk
Love in a mist
Nigella damascena
20 May
24 Jun
0 wk
21 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
31 Mar – 14 Apr
5 May
6-8 wk
26 May
16 Jun
1 wk after
9 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
14 Apr
8-12 wk
22 May
9 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
3 – 31 Mar
15 Mar
8-12 wk
26 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
3 – 31 Mar
26 Apr
8-12 wk
26 May
21 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
31 Mar – 14 Apr
10 May
6-8 wk
26 May
21 Jun
1 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
24 Mar – 7 Apr
11 May
8-10 wk
2 Jun
6 Jul
2 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
25 May
5-8 wk
20 May
29 Jun
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
28 Apr
6-8 wk
20 May
9 Jun
0 wk
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
14 – 28 Apr
19 May
4-6 wk
26 May
16 Jun
1 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
14 May
8-10 wk
20 May
9 Jul
0 wk
30 May
29 Jun
1 wk after
Petunia
Petunia
Fleece
3 – 31 Mar
1 May
8-12 wk
26 May
26 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
28 Apr
6-8 wk
22 May
9 Jun
0 wk
2 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
14 – 28 Apr
3 Jun
4-6 wk
26 May
1 Jul
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
21 Apr – 5 May
10 Jun
3-5 wk
26 May
1 Jul
1 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
24 May
4-6 wk
2 Jun
21 Jun
2 wk after
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
29 Mar – 26 Apr
11 May
8-12 wk
21 Jun
6 Jul
5 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
29 Mar
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
9 Jun
0 wk
21 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
18 May
6-8 wk
20 May
29 Jun
0 wk
4 May
19 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
3 – 17 Mar
31 Mar
10-12 wk
26 May
9 Jun
1 wk after
Sunflower
Helianthus annuus
5 – 12 May
8 Jun
3-4 wk
2 Jun
29 Jun
2 wk after
14 Jun
19 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
28 May
6-8 wk
2 Jun
9 Jul
2 wk after
2 Jul
6 wk after
Annual phlox
Phlox drummondii
31 Mar – 14 Apr
16 May
6-8 wk
26 May
27 Jun
1 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
7 – 21 Apr
16 May
6-8 wk
2 Jun
27 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
18 May
6-8 wk
22 May
29 Jun
0 wk
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
Greenhouse
17 Mar – 14 Apr
20 May
6-10 wk
26 May
1 Jul
1 wk after
California goldenpoppy
Eschscholzia californica
20 May
9 Jul
0 wk
21 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
4 May
8-10 wk
2 Jun
29 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
28 Apr
6-8 wk
20 May
9 Jun
0 wk
2 Jun
2 wk after