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Method
Rel. frost
Last spring frost (0°C) 25 May Frost 3 of 4 years · 20 years of data
Frost-free season 93 days 25 May – 26 Aug
Probability that frost is over

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