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Method
Rel. frost
Last spring frost (0°C) 23 May Normal year · 20 years of data
Frost-free season 121 days 23 May – 21 Sep
Probability that frost is over

50% = 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)
4 – 18 Apr
14 Jun
5-7 wk
23 May
19 Jul
0 wk
27 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
26 Jun
4-6 wk
23 May
24 Jul
0 wk
27 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
15 Mar – 12 Apr
31 Mar
8-12 wk
7 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
9 Jun
5-7 wk
23 May
14 Jul
0 wk
23 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
22 – 29 May
25 May
3-4 wk
19 Jun
4 wk after
Florence Fennel
Foeniculum vulgare
Fleece
15 – 22 May
5 Jun
4-5 wk
19 Jun
3 Jul
4 wk after
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
12 – 19 Jun
3-4 wk
10 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
28 Feb – 28 Mar
23 Mar
8-12 wk
23 May
0 wk
13 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
27 May
7 Jun
1 wk after
27 May
28 May
1 wk after
Maize
Zea mays
Fleece
10 – 17 May
15 May
3-4 wk
7 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
3 – 10 May
2 Jul
3-4 wk
31 May
23 Jul
1 wk after
13 Jun
13 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
4 Jul
0 wk
23 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
9 Jun
5-7 wk
23 May
14 Jul
0 wk
23 May
4 Jul
0 wk
Potato
Solanum tuberosum
27 Apr – 11 May
19 May
4-6 wk
8 Jun
16 Jun
2 wk after
8 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
19 Jun
5-7 wk
23 May
24 Jul
0 wk
27 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
22 – 29 May
17 Jun
3-4 wk
19 Jun
8 Jul
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
3 – 10 May
25 May
3-4 wk
31 May
15 Jun
1 wk after
13 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
21 Jun
4-6 wk
23 May
19 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
8 Jul
3-4 wk
23 May
29 Jul
0 wk
27 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
21 Jun
4-6 wk
23 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
26 May
2-4 wk
23 May
9 Jun
0 wk
23 May
30 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
27 May
7 Jun
1 wk after
27 May
28 May
1 wk after
Spinach
Spinacia oleracea
25 Apr – 2 May
23 Jul
3-4 wk
23 May
13 Aug
0 wk
19 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
24 Jun – 8 Jul
4-6 wk
5 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
12 – 26 Apr
24 Apr
6-8 wk
7 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
22 May – 5 Jun
1 Jun
2-4 wk
19 Jun
4 wk after
11 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
21 Jun
4-6 wk
23 May
19 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
23 Jun
3-4 wk
23 May
14 Jul
0 wk
27 May
4 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
8 – 22 May
26 May
4-6 wk
19 Jun
23 Jun
4 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
19 May
8-10 wk
23 May
14 Jul
0 wk
27 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
27 May
23 Jul
1 wk after
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
2 Jun
6-8 wk
23 May
14 Jul
0 wk
27 May
4 Jul
1 wk after
Spearmint
Mentha spicata
28 Feb – 28 Mar
19 May
8-12 wk
23 May
14 Jul
0 wk
27 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
23 May
12 Aug
0 wk
13 Jun
2 Aug
3 wk after
Garden sage
Salvia officinalis
22 Mar – 5 Apr
4 May
8-10 wk
31 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
14 – 28 Mar
9 May
8-10 wk
23 May
4 Jul
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
23 May
6-8 wk
23 May
4 Jul
0 wk
27 Jun
5 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
23 May
6-8 wk
23 May
4 Jul
0 wk
27 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
22 Feb – 22 Mar
27 Mar
10-14 wk
31 May
5 Jun
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
22 – 29 May
2 Jun
3-4 wk
19 Jun
23 Jun
4 wk after
Cornflower
Centaurea cyanus
23 May
14 Jul
0 wk
27 May
4 Jul
1 wk after
Statice
Limonium sinuatum
10 – 24 Apr
22 Apr
8-10 wk
19 Jun
4 wk after
Sweet William
Dianthus barbatus
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
8 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
24 Apr – 8 May
6 May
6-8 wk
19 Jun
4 wk after
5 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Apr
13 May
6-8 wk
11 Jun
24 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 May
27 May
4-8 wk
27 Jun
5 wk after
27 Jun
5 wk after
Foxglove
Digitalis purpurea
14 – 28 Mar
8-10 wk
23 May
0 wk
13 Jun
3 wk after
Busy lizzie
Impatiens walleriana
12 Apr – 10 May
13 Jun
8-12 wk
5 Jul
8 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
24 Apr – 8 May
16 May
6-8 wk
19 Jun
27 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
8 – 22 May
4-6 wk
19 Jun
4 wk after
Chinese lantern
Physalis alkekengi
22 Mar – 5 Apr
18 Apr
8-10 wk
31 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
23 May
29 Jun
0 wk
27 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
24 Apr – 8 May
26 Apr
6-8 wk
19 Jun
4 wk after
5 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
8 Mar – 5 Apr
18 Apr
8-12 wk
31 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
15 Mar – 12 Apr
20 Mar
8-12 wk
7 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
27 Mar – 24 Apr
18 Apr
8-12 wk
19 Jun
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
24 Apr – 8 May
2 May
6-8 wk
19 Jun
4 wk after
Corn poppy
Papaver rhoeas
23 May
14 Jul
0 wk
27 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
9 May
8-12 wk
23 May
4 Jul
0 wk
8 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
10 – 24 Apr
9 May
8-10 wk
19 Jun
4 Jul
4 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
30 May
5-8 wk
23 May
4 Jul
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
2 Jun
6-8 wk
23 May
14 Jul
0 wk
13 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
3 May
6-8 wk
23 May
14 Jun
0 wk
13 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
8 – 22 May
11 May
4-6 wk
19 Jun
4 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
19 May
8-10 wk
23 May
14 Jul
0 wk
8 Jun
4 Jul
2 wk after
Petunia
Petunia
27 Mar – 24 Apr
22 Apr
8-12 wk
19 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
5 – 19 Apr
2 May
6-8 wk
31 May
13 Jun
1 wk after
11 Jul
7 wk after
Common zinnia
Zinnia elegans
8 – 22 May
26 May
4-6 wk
19 Jun
23 Jun
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
15 – 29 May
2 Jun
3-5 wk
19 Jun
23 Jun
4 wk after
Garden cosmos
Cosmos bipinnatus
8 – 22 May
27 May
4-6 wk
19 Jun
24 Jun
4 wk after
11 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
12 Apr – 10 May
18 May
8-12 wk
5 Jul
13 Jul
6 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
19 Apr
8-12 wk
23 May
14 Jun
0 wk
27 Jun
5 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
3 Apr
6-8 wk
23 May
0 wk
13 Jun
3 wk after
Safflower
Carthamus tinctorius
23 May
14 Jun
0 wk
27 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
23 May
6-8 wk
23 May
4 Jul
0 wk
5 May
24 Jun
3 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
6 Jun
4-6 wk
23 May
4 Jul
0 wk
13 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
27 Mar – 10 Apr
10-12 wk
19 Jun
4 wk after
Sunflower
Helianthus annuus
22 – 29 May
4 Jun
3-4 wk
19 Jun
25 Jun
4 wk after
27 Jun
5 wk after
China aster
Callistephus chinensis
24 Apr – 8 May
24 May
6-8 wk
19 Jun
5 Jul
4 wk after
11 Jul
7 wk after
Annual phlox
Phlox drummondii
12 – 26 Apr
16 May
6-8 wk
7 Jun
27 Jun
2 wk after
11 Jul
7 wk after
Hollyhock
Alcea rosea
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
13 Jun
3 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
19 Apr
8-12 wk
23 May
14 Jun
0 wk
27 Jun
5 wk after
African marigold
Tagetes erecta
24 Apr – 8 May
16 May
6-8 wk
19 Jun
27 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
5 – 19 Apr
14 May
6-8 wk
31 May
25 Jun
1 wk after
11 Jul
7 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
9 Apr
8-10 wk
23 May
4 Jun
0 wk
27 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
10 Apr – 8 May
12 May
6-10 wk
19 Jun
23 Jun
4 wk after
California goldenpoppy
Eschscholzia californica
23 May
14 Jul
0 wk
27 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
10 – 24 Apr
25 Apr
8-10 wk
19 Jun
20 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
3 May
6-8 wk
23 May
14 Jun
0 wk
13 Jun
3 wk after