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Method
Rel. frost
Last spring frost (0°C) 23 May Normal year · 20 years of data
Frost-free season 107 days 23 May – 7 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
9 Jun
5-7 wk
23 May
14 Jul
0 wk
24 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
21 Jun
4-6 wk
23 May
19 Jul
0 wk
24 May
9 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
4 Jun
5-7 wk
23 May
9 Jul
0 wk
23 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
1 – 8 May
5 Jun
3-4 wk
29 May
26 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
26 May
3-4 wk
23 May
16 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
29 Jun
0 wk
23 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
4 Jun
5-7 wk
23 May
9 Jul
0 wk
23 May
29 Jun
0 wk
Potato
Solanum tuberosum
21 Apr – 5 May
11 May
4-6 wk
2 Jun
8 Jun
1 wk after
2 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
14 Jun
5-7 wk
23 May
19 Jul
0 wk
24 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
8 – 15 May
10 Jun
3-4 wk
5 Jun
1 Jul
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
16 Jun
4-6 wk
23 May
14 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
3 Jul
3-4 wk
23 May
24 Jul
0 wk
24 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
16 Jun
4-6 wk
23 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
19 May
2-4 wk
23 May
2 Jun
0 wk
23 May
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
18 Jul
3-4 wk
23 May
8 Aug
0 wk
20 May
29 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
5 May
6-8 wk
23 May
16 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
1 – 15 May
12 Jun
2-4 wk
29 May
26 Jun
1 wk after
17 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
16 Jun
4-6 wk
23 May
14 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
18 Jun
3-4 wk
23 May
9 Jul
0 wk
24 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
Fleece
24 Apr – 8 May
19 May
4-6 wk
5 Jun
16 Jun
2 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
14 May
8-10 wk
23 May
9 Jul
0 wk
17 Jun
29 Jun
4 wk after
Dill
Anethum graveolens
24 May
18 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
28 May
6-8 wk
23 May
9 Jul
0 wk
24 May
29 Jun
0 wk
Spearmint
Mentha spicata
28 Feb – 28 Mar
14 May
8-12 wk
23 May
9 Jul
0 wk
17 Jun
29 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
29 Apr
8-10 wk
25 May
24 Jun
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
4 May
8-10 wk
23 May
29 Jun
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
18 May
6-8 wk
23 May
29 Jun
0 wk
17 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
18 May
6-8 wk
23 May
29 Jun
0 wk
24 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
16 Feb – 16 Mar
24 Mar
10-14 wk
25 May
2 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
26 May
3-4 wk
5 Jun
16 Jun
2 wk after
Cornflower
Centaurea cyanus
23 May
9 Jul
0 wk
24 May
29 Jun
0 wk
Statice
Limonium sinuatum
27 Mar – 10 Apr
17 Apr
8-10 wk
5 Jun
12 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
1 May
6-8 wk
5 Jun
12 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
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
6 Jun
8-12 wk
24 Jun
1 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
10 – 24 Apr
11 May
6-8 wk
5 Jun
22 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
24 Jun
0 wk
24 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
3 – 17 Apr
2 May
6-8 wk
29 May
13 Jun
1 wk after
12 Jul
7 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
15 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
6 Mar – 3 Apr
22 Apr
8-12 wk
29 May
17 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
3 – 17 Apr
6 May
6-8 wk
29 May
17 Jun
1 wk after
Corn poppy
Papaver rhoeas
23 May
9 Jul
0 wk
24 May
29 Jun
0 wk
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
4 May
8-12 wk
23 May
29 Jun
0 wk
2 Jun
19 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Mar – 10 Apr
8 May
8-10 wk
5 Jun
3 Jul
2 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
25 May
5-8 wk
23 May
29 Jun
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
28 May
6-8 wk
23 May
9 Jul
0 wk
5 Jun
29 Jun
2 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
28 Apr
6-8 wk
23 May
9 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
14 May
8-10 wk
23 May
9 Jul
0 wk
2 Jun
29 Jun
1 wk after
Petunia
Petunia
13 Mar – 10 Apr
17 Apr
8-12 wk
5 Jun
12 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
19 May
4-6 wk
5 Jun
16 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
1 – 15 May
26 May
3-5 wk
5 Jun
16 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
11 May
8-12 wk
24 Jun
6 Jul
5 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
14 Apr
8-12 wk
23 May
9 Jun
0 wk
17 Jun
4 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
29 Mar
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Safflower
Carthamus tinctorius
23 May
9 Jun
0 wk
24 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
18 May
6-8 wk
23 May
29 Jun
0 wk
7 May
19 Jun
2 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
1 Jun
4-6 wk
23 May
29 Jun
0 wk
5 Jun
19 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
6 – 20 Mar
28 Mar
10-12 wk
29 May
6 Jun
1 wk after
Sunflower
Helianthus annuus
8 – 15 May
1 Jun
3-4 wk
5 Jun
22 Jun
2 wk after
17 Jun
4 wk after
China aster
Callistephus chinensis
10 – 24 Apr
21 May
6-8 wk
5 Jun
2 Jul
2 wk after
5 Jul
6 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
11 May
6-8 wk
29 May
22 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
14 Apr
8-12 wk
23 May
9 Jun
0 wk
17 Jun
4 wk after
African marigold
Tagetes erecta
10 – 24 Apr
11 May
6-8 wk
5 Jun
22 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
11 May
6-8 wk
25 May
22 Jun
0 wk
5 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
4 Apr
8-10 wk
23 May
30 May
0 wk
17 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
27 Mar – 24 Apr
5 May
6-10 wk
5 Jun
16 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
23 May
9 Jul
0 wk
24 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
27 Mar – 10 Apr
18 Apr
8-10 wk
5 Jun
13 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
28 Apr
6-8 wk
23 May
9 Jun
0 wk
5 Jun
2 wk after