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Method
Rel. frost
Last spring frost (0°C) 23 May Normal year · 20 years of data
Frost-free season 115 days 23 May – 15 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
13 Jun
5-7 wk
23 May
18 Jul
0 wk
24 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
25 Jun
4-6 wk
23 May
23 Jul
0 wk
24 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
25 Mar
8-12 wk
29 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
8 Jun
5-7 wk
23 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
8 – 15 May
19 May
3-4 wk
5 Jun
9 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
5 Jun
4-5 wk
5 Jun
3 Jul
2 wk after
17 Jun
23 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)
28 Feb – 28 Mar
18 Mar
8-12 wk
23 May
0 wk
5 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
2 Jun
0 wk
24 May
0 wk
Maize
Zea mays
Greenhouse
25 Apr – 2 May
28 May
3-4 wk
23 May
18 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Apr – 4 May
2 Jul
3-4 wk
25 May
23 Jul
0 wk
5 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
3 Jul
0 wk
23 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
8 Jun
5-7 wk
23 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Potato
Solanum tuberosum
21 Apr – 5 May
15 May
4-6 wk
2 Jun
12 Jun
1 wk after
2 Jun
2 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
18 Jun
5-7 wk
23 May
23 Jul
0 wk
24 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
8 – 15 May
12 Jun
3-4 wk
5 Jun
3 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
27 Apr – 4 May
19 May
3-4 wk
25 May
9 Jun
0 wk
5 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
20 Jun
4-6 wk
23 May
18 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
7 Jul
3-4 wk
23 May
28 Jul
0 wk
24 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
20 Jun
4-6 wk
23 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
21 May
2-4 wk
23 May
4 Jun
0 wk
23 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
2 Jun
0 wk
24 May
0 wk
Spinach
Spinacia oleracea
25 Apr – 2 May
22 Jul
3-4 wk
23 May
12 Aug
0 wk
20 May
2 Aug
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
7 May
6-8 wk
23 May
18 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
8 – 22 May
26 May
2-4 wk
5 Jun
9 Jun
2 wk after
5 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
20 Jun
4-6 wk
23 May
18 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
22 Jun
3-4 wk
23 May
13 Jul
0 wk
24 May
3 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
24 Apr – 8 May
21 May
4-6 wk
5 Jun
18 Jun
2 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
18 May
8-10 wk
23 May
13 Jul
0 wk
17 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
24 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
1 Jun
6-8 wk
23 May
13 Jul
0 wk
24 May
3 Jul
0 wk
Spearmint
Mentha spicata
28 Feb – 28 Mar
18 May
8-12 wk
23 May
13 Jul
0 wk
17 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
23 May
12 Aug
0 wk
5 Jun
2 Aug
2 wk after
Garden sage
Salvia officinalis
16 – 30 Mar
3 May
8-10 wk
25 May
28 Jun
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
8 May
8-10 wk
23 May
3 Jul
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
22 May
6-8 wk
23 May
3 Jul
0 wk
17 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
22 May
6-8 wk
23 May
3 Jul
0 wk
24 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
16 Feb – 16 Mar
31 Mar
10-14 wk
25 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
Fleece
8 – 15 May
28 May
3-4 wk
5 Jun
18 Jun
2 wk after
Cornflower
Centaurea cyanus
23 May
13 Jul
0 wk
24 May
3 Jul
0 wk
Statice
Limonium sinuatum
27 Mar – 10 Apr
16 Apr
8-10 wk
5 Jun
11 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
30 Apr
6-8 wk
5 Jun
11 Jun
2 wk after
29 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
8 – 22 Apr
6 May
6-8 wk
3 Jun
17 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
22 Apr – 20 May
20 May
4-8 wk
17 Jun
17 Jun
4 wk after
17 Jun
4 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
8 Jun
8-12 wk
24 Jun
3 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
10 – 24 Apr
10 May
6-8 wk
5 Jun
21 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
18 Apr
8-10 wk
25 May
13 Jun
0 wk
Love in a mist
Nigella damascena
23 May
28 Jun
0 wk
24 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
3 – 17 Apr
29 Apr
6-8 wk
29 May
10 Jun
1 wk after
12 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Mar
18 Apr
8-12 wk
25 May
13 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
28 Feb – 28 Mar
19 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
13 Mar – 10 Apr
13 Apr
8-12 wk
5 Jun
8 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
10 – 24 Apr
27 Apr
6-8 wk
5 Jun
8 Jun
2 wk after
Corn poppy
Papaver rhoeas
23 May
13 Jul
0 wk
24 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
8 May
8-12 wk
23 May
3 Jul
0 wk
2 Jun
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Mar – 10 Apr
5 May
8-10 wk
5 Jun
30 Jun
2 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
29 May
5-8 wk
23 May
3 Jul
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
1 Jun
6-8 wk
23 May
13 Jul
0 wk
5 Jun
3 Jul
2 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
2 May
6-8 wk
23 May
13 Jun
0 wk
5 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
17 Apr – 1 May
15 May
4-6 wk
29 May
12 Jun
1 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
18 May
8-10 wk
23 May
13 Jul
0 wk
2 Jun
3 Jul
1 wk after
Petunia
Petunia
13 Mar – 10 Apr
16 Apr
8-12 wk
5 Jun
11 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Mar – 13 Apr
2 May
6-8 wk
25 May
13 Jun
0 wk
5 Jul
6 wk after
Common zinnia
Zinnia elegans
24 Apr – 8 May
21 May
4-6 wk
5 Jun
18 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
1 – 15 May
28 May
3-5 wk
5 Jun
18 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
24 Apr – 8 May
20 May
4-6 wk
5 Jun
17 Jun
2 wk after
5 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
1 – 29 Apr
13 May
8-12 wk
24 Jun
8 Jul
5 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
18 Apr
8-12 wk
23 May
13 Jun
0 wk
17 Jun
4 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
2 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Safflower
Carthamus tinctorius
23 May
13 Jun
0 wk
24 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
22 May
6-8 wk
23 May
3 Jul
0 wk
7 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
5 Jun
4-6 wk
23 May
3 Jul
0 wk
5 Jun
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
6 – 20 Mar
31 Mar
10-12 wk
29 May
9 Jun
1 wk after
Sunflower
Helianthus annuus
8 – 15 May
8 Jun
3-4 wk
5 Jun
29 Jun
2 wk after
17 Jun
19 Jun
4 wk after
China aster
Callistephus chinensis
10 – 24 Apr
28 May
6-8 wk
5 Jun
9 Jul
2 wk after
5 Jul
6 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
10 May
6-8 wk
29 May
21 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
18 Apr
8-12 wk
23 May
13 Jun
0 wk
17 Jun
4 wk after
African marigold
Tagetes erecta
10 – 24 Apr
10 May
6-8 wk
5 Jun
21 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
18 May
6-8 wk
25 May
29 Jun
0 wk
5 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
8 Apr
8-10 wk
23 May
3 Jun
0 wk
17 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
27 Mar – 24 Apr
7 May
6-10 wk
5 Jun
18 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
23 May
13 Jul
0 wk
24 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
27 Mar – 10 Apr
25 Apr
8-10 wk
5 Jun
20 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
2 May
6-8 wk
23 May
13 Jun
0 wk
5 Jun
2 wk after