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