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Method
Rel. frost
Last spring frost (0°C) 23 May Normal year · 20 years of data
Frost-free season 114 days 23 May – 14 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
10 Jun
5-7 wk
23 May
15 Jul
0 wk
24 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
22 Jun
4-6 wk
23 May
20 Jul
0 wk
24 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
5 Jun
5-7 wk
23 May
10 Jul
0 wk
23 May
30 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
1 – 8 May
24 May
3-4 wk
29 May
14 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
31 May
4-5 wk
5 Jun
28 Jun
2 wk after
17 Jun
18 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
28 Feb – 28 Mar
21 Mar
8-12 wk
23 May
0 wk
29 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
26 May
0 wk
24 May
0 wk
Maize
Zea mays
Greenhouse
25 Apr – 2 May
14 May
3-4 wk
23 May
4 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Apr – 4 May
27 Jun
3-4 wk
25 May
18 Jul
0 wk
5 Jun
8 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
30 Jun
0 wk
23 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
5 Jun
5-7 wk
23 May
10 Jul
0 wk
23 May
30 Jun
0 wk
Potato
Solanum tuberosum
21 Apr – 5 May
12 May
4-6 wk
2 Jun
9 Jun
1 wk after
2 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
15 Jun
5-7 wk
23 May
20 Jul
0 wk
24 May
10 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
8 – 15 May
29 May
3-4 wk
5 Jun
19 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
27 Apr – 4 May
9 May
3-4 wk
25 May
30 May
0 wk
5 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
17 Jun
4-6 wk
23 May
15 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
4 Jul
3-4 wk
23 May
25 Jul
0 wk
24 May
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
17 Jun
4-6 wk
23 May
15 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
17 May
2-4 wk
23 May
31 May
0 wk
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
26 May
0 wk
24 May
0 wk
Spinach
Spinacia oleracea
25 Apr – 2 May
19 Jul
3-4 wk
23 May
9 Aug
0 wk
20 May
30 Jul
0 wk
Sweet potato
Ipomoea batatas
17 Jun – 1 Jul
4-6 wk
29 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
28 Mar – 11 Apr
23 Apr
6-8 wk
23 May
4 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
1 – 15 May
31 May
2-4 wk
29 May
14 Jun
1 wk after
17 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
17 Jun
4-6 wk
23 May
15 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
19 Jun
3-4 wk
23 May
10 Jul
0 wk
24 May
30 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
24 Apr – 8 May
7 May
4-6 wk
5 Jun
2 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
15 May
8-10 wk
23 May
10 Jul
0 wk
17 Jun
30 Jun
4 wk after
Dill
Anethum graveolens
24 May
18 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
29 May
6-8 wk
23 May
10 Jul
0 wk
24 May
30 Jun
0 wk
Spearmint
Mentha spicata
28 Feb – 28 Mar
15 May
8-12 wk
23 May
10 Jul
0 wk
17 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
23 May
7 Aug
0 wk
5 Jun
28 Jul
2 wk after
Garden sage
Salvia officinalis
16 – 30 Mar
30 Apr
8-10 wk
25 May
25 Jun
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
5 May
8-10 wk
23 May
30 Jun
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
19 May
6-8 wk
23 May
30 Jun
0 wk
17 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
19 May
6-8 wk
23 May
30 Jun
0 wk
24 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
16 Feb – 16 Mar
21 Mar
10-14 wk
25 May
30 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
8 – 15 May
14 May
3-4 wk
5 Jun
2 wk after
Cornflower
Centaurea cyanus
23 May
10 Jul
0 wk
24 May
30 Jun
0 wk
Statice
Limonium sinuatum
27 Mar – 10 Apr
13 Apr
8-10 wk
5 Jun
8 Jun
2 wk after
Sweet William
Dianthus barbatus
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
2 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
10 – 24 Apr
27 Apr
6-8 wk
5 Jun
8 Jun
2 wk after
29 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
8 – 22 Apr
3 May
6-8 wk
3 Jun
14 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
10 Apr – 8 May
29 May
4-8 wk
5 Jun
26 Jun
2 wk after
5 Jun
16 Jun
2 wk after
Foxglove
Digitalis purpurea
14 – 28 Mar
8-10 wk
23 May
0 wk
5 Jun
2 wk after
Busy lizzie
Impatiens walleriana
1 – 29 Apr
25 May
8-12 wk
24 Jun
20 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
10 – 24 Apr
7 May
6-8 wk
5 Jun
18 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
24 Apr – 8 May
4-6 wk
5 Jun
2 wk after
Chinese lantern
Physalis alkekengi
16 – 30 Mar
13 Apr
8-10 wk
25 May
8 Jun
0 wk
Love in a mist
Nigella damascena
23 May
25 Jun
0 wk
24 May
15 Jun
0 wk
Strawflower
Xerochrysum bracteatum
10 – 24 Apr
17 Apr
6-8 wk
5 Jun
2 wk after
29 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Mar
13 Apr
8-12 wk
25 May
8 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
28 Feb – 28 Mar
16 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
13 Mar – 10 Apr
30 Mar
8-12 wk
5 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
10 – 24 Apr
13 Apr
6-8 wk
5 Jun
2 wk after
Corn poppy
Papaver rhoeas
23 May
10 Jul
0 wk
24 May
30 Jun
0 wk
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
5 May
8-12 wk
23 May
30 Jun
0 wk
2 Jun
20 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Mar – 10 Apr
7 May
8-10 wk
5 Jun
2 Jul
2 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
26 May
5-8 wk
23 May
30 Jun
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
29 May
6-8 wk
23 May
10 Jul
0 wk
5 Jun
30 Jun
2 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
29 Apr
6-8 wk
23 May
10 Jun
0 wk
5 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
17 Apr – 1 May
12 May
4-6 wk
29 May
9 Jun
1 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
15 May
8-10 wk
23 May
10 Jul
0 wk
2 Jun
30 Jun
1 wk after
Petunia
Petunia
13 Mar – 10 Apr
13 Apr
8-12 wk
5 Jun
8 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Mar – 13 Apr
27 Apr
6-8 wk
25 May
8 Jun
0 wk
5 Jul
6 wk after
Common zinnia
Zinnia elegans
24 Apr – 8 May
7 May
4-6 wk
5 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
1 – 15 May
14 May
3-5 wk
5 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
24 Apr – 8 May
17 May
4-6 wk
5 Jun
14 Jun
2 wk after
5 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
13 Mar – 10 Apr
19 May
8-12 wk
5 Jun
14 Jul
2 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
15 Apr
8-12 wk
23 May
10 Jun
0 wk
17 Jun
4 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
30 Mar
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Safflower
Carthamus tinctorius
23 May
10 Jun
0 wk
24 May
31 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
19 May
6-8 wk
23 May
30 Jun
0 wk
7 May
20 Jun
2 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
2 Jun
4-6 wk
23 May
30 Jun
0 wk
5 Jun
20 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
13 – 27 Mar
16 Mar
10-12 wk
5 Jun
2 wk after
Sunflower
Helianthus annuus
8 – 15 May
29 May
3-4 wk
5 Jun
19 Jun
2 wk after
17 Jun
4 wk after
China aster
Callistephus chinensis
10 – 24 Apr
18 May
6-8 wk
5 Jun
29 Jun
2 wk after
5 Jul
6 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
7 May
6-8 wk
29 May
18 Jun
1 wk after
5 Jul
6 wk after
Hollyhock
Alcea rosea
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
15 Apr
8-12 wk
23 May
10 Jun
0 wk
17 Jun
4 wk after
African marigold
Tagetes erecta
10 – 24 Apr
7 May
6-8 wk
5 Jun
18 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
8 May
6-8 wk
25 May
19 Jun
0 wk
5 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
5 Apr
8-10 wk
23 May
31 May
0 wk
17 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
27 Mar – 24 Apr
23 Apr
6-10 wk
5 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
23 May
10 Jul
0 wk
24 May
30 Jun
0 wk
Painted tongue
Salpiglossis sinuata
27 Mar – 10 Apr
19 Apr
8-10 wk
5 Jun
14 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
29 Apr
6-8 wk
23 May
10 Jun
0 wk
5 Jun
2 wk after