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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 3 of 4 years · 20 years of data
Frost-free season 100 days 21 May – 29 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)
2 – 16 Apr
11 Jun
5-7 wk
21 May
16 Jul
0 wk
22 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
23 Jun
4-6 wk
21 May
21 Jul
0 wk
22 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
23 Mar
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
6 – 13 May
17 May
3-4 wk
3 Jun
7 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
21 May
4-5 wk
3 Jun
18 Jun
2 wk after
15 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
26 Feb – 26 Mar
19 Mar
8-12 wk
21 May
0 wk
27 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
25 May
0 wk
22 May
0 wk
Maize
Zea mays
Fleece
29 Apr – 6 May
7 May
3-4 wk
27 May
28 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
17 Jun
3-4 wk
23 May
8 Jul
0 wk
3 Jun
28 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
27 Jun
0 wk
21 May
17 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
6 May
4-6 wk
31 May
3 Jun
1 wk after
31 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
22 May
7 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
6 – 13 May
30 May
3-4 wk
3 Jun
20 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
13 May
3-4 wk
23 May
3 Jun
0 wk
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
1 Jul
3-4 wk
21 May
22 Jul
0 wk
22 May
12 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
13 May
2-4 wk
21 May
27 May
0 wk
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
25 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
20 Jul
3-4 wk
21 May
10 Aug
0 wk
18 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
1 – 15 Apr
16 Apr
6-8 wk
27 May
28 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
6 – 20 May
24 May
2-4 wk
3 Jun
7 Jun
2 wk after
3 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
16 Jun
3-4 wk
21 May
7 Jul
0 wk
22 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
Fleece
22 Apr – 6 May
8 May
4-6 wk
3 Jun
5 Jun
2 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
12 May
8-10 wk
21 May
7 Jul
0 wk
15 Jun
27 Jun
4 wk after
Dill
Anethum graveolens
22 May
8 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
16 May
8-12 wk
21 May
11 Jul
0 wk
15 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
28 Jul
0 wk
3 Jun
18 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
1 May
8-10 wk
23 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
6 May
8-10 wk
21 May
1 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
15 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
22 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
11 Mar
10-14 wk
23 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
6 – 13 May
15 May
3-4 wk
3 Jun
5 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Statice
Limonium sinuatum
25 Mar – 8 Apr
13 Apr
8-10 wk
3 Jun
8 Jun
2 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
8 – 22 Apr
27 Apr
6-8 wk
3 Jun
8 Jun
2 wk after
27 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
2 May
6-8 wk
1 Jun
13 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Apr – 18 May
16 May
4-8 wk
15 Jun
4 wk after
15 Jun
4 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
30 Mar – 27 Apr
26 May
8-12 wk
22 Jun
21 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Apr
7 May
6-8 wk
3 Jun
18 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
3 Apr
8-10 wk
23 May
29 May
0 wk
Love in a mist
Nigella damascena
21 May
22 Jun
0 wk
22 May
12 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
24 Apr
6-8 wk
27 May
5 Jun
1 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
3 Apr
8-12 wk
23 May
29 May
0 wk
Cardoon
Cynara cardunculus
Season too short
26 Feb – 26 Mar
17 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
4 Mar – 1 Apr
18 Apr
8-12 wk
27 May
13 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
1 – 15 Apr
2 May
6-8 wk
27 May
13 Jun
1 wk after
Corn poppy
Papaver rhoeas
21 May
7 Jul
0 wk
22 May
27 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
2 May
8-12 wk
21 May
27 Jun
0 wk
31 May
17 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
25 Mar – 8 Apr
30 Apr
8-10 wk
3 Jun
25 Jun
2 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
27 May
5-8 wk
21 May
1 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
0 wk
3 Jun
27 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
15 – 29 Apr
11 May
4-6 wk
27 May
8 Jun
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
16 May
8-10 wk
21 May
11 Jul
0 wk
31 May
1 Jul
1 wk after
Petunia
Petunia
11 Mar – 8 Apr
13 Apr
8-12 wk
3 Jun
8 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
17 Apr
6-8 wk
23 May
29 May
0 wk
3 Jul
6 wk after
Common zinnia
Zinnia elegans
22 Apr – 6 May
8 May
4-6 wk
3 Jun
5 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
29 Apr – 13 May
15 May
3-5 wk
3 Jun
5 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
22 Apr – 6 May
16 May
4-6 wk
3 Jun
13 Jun
2 wk after
3 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
30 Apr
8-12 wk
22 Jun
25 Jun
5 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
12 Apr
8-12 wk
21 May
7 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
31 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
11 Jun
0 wk
22 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
5 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
30 May
4-6 wk
21 May
27 Jun
0 wk
3 Jun
17 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
4 – 18 Mar
25 Mar
10-12 wk
27 May
3 Jun
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
19 May
3-4 wk
3 Jun
9 Jun
2 wk after
15 Jun
4 wk after
China aster
Callistephus chinensis
8 – 22 Apr
8 May
6-8 wk
3 Jun
19 Jun
2 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
7 May
6-8 wk
27 May
18 Jun
1 wk after
3 Jul
6 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
12 Apr
8-12 wk
21 May
7 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
8 – 22 Apr
7 May
6-8 wk
3 Jun
18 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
28 Apr
6-8 wk
23 May
9 Jun
0 wk
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
2 Apr
8-10 wk
21 May
28 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
25 Mar – 22 Apr
24 Apr
6-10 wk
3 Jun
5 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
3 Jul
0 wk
22 May
23 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
23 Apr
8-10 wk
27 May
18 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after