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Method
Rel. frost
Last spring frost (0°C) 13 May Frost 3 of 4 years · 20 years of data
Frost-free season 117 days 13 May – 7 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)
25 Mar – 8 Apr
14 Jun
5-7 wk
13 May
19 Jul
0 wk
14 May
9 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
1 – 15 Apr
26 Jun
4-6 wk
13 May
24 Jul
0 wk
14 May
14 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
28 Feb – 28 Mar
22 Mar
8-12 wk
23 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
25 Mar – 8 Apr
9 Jun
5-7 wk
13 May
14 Jul
0 wk
13 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
5 – 12 May
16 May
3-4 wk
2 Jun
6 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
Fleece
28 Apr – 5 May
29 May
4-5 wk
2 Jun
26 Jun
3 wk after
7 Jun
16 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
18 Feb – 18 Mar
15 Mar
8-12 wk
13 May
0 wk
26 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 May
30 May
0 wk
14 May
20 May
0 wk
Maize
Zea mays
Fleece
25 Apr – 2 May
6 May
3-4 wk
23 May
27 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
25 Jun
3-4 wk
18 May
16 Jul
1 wk after
26 May
6 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
13 May
30 Jun
0 wk
13 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
25 Mar – 8 Apr
9 Jun
5-7 wk
13 May
14 Jul
0 wk
13 May
4 Jul
0 wk
Potato
Solanum tuberosum
11 – 25 Apr
12 May
4-6 wk
23 May
9 Jun
1 wk after
23 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
25 Mar – 8 Apr
15 Jun
5-7 wk
13 May
20 Jul
0 wk
14 May
10 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
5 – 12 May
6 Jun
3-4 wk
2 Jun
27 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
19 May
3-4 wk
18 May
9 Jun
1 wk after
26 May
30 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
1 – 15 Apr
21 Jun
4-6 wk
13 May
19 Jul
0 wk
Lettuce
Lactuca sativa
15 – 22 Apr
4 Jul
3-4 wk
13 May
25 Jul
0 wk
14 May
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Apr
21 Jun
4-6 wk
13 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Apr
19 May
2-4 wk
13 May
2 Jun
0 wk
13 May
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
14 May
30 May
0 wk
14 May
20 May
0 wk
Spinach
Spinacia oleracea
15 – 22 Apr
23 Jul
3-4 wk
13 May
13 Aug
0 wk
10 May
3 Aug
0 wk
Sweet potato
Ipomoea batatas
7 – 21 Jun
4-6 wk
19 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
28 Mar – 11 Apr
15 Apr
6-8 wk
23 May
27 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
5 – 19 May
23 May
2-4 wk
2 Jun
6 Jun
3 wk after
25 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
1 – 15 Apr
21 Jun
4-6 wk
13 May
19 Jul
0 wk
Garden pea
Pisum sativum
15 – 22 Apr
19 Jun
3-4 wk
13 May
10 Jul
0 wk
14 May
30 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
21 Apr – 5 May
15 May
4-6 wk
2 Jun
12 Jun
3 wk after
Lemon balm
Melissa officinalis
4 – 18 Mar
15 May
8-10 wk
13 May
10 Jul
0 wk
7 Jun
30 Jun
4 wk after
Dill
Anethum graveolens
14 May
16 Jul
0 wk
Wild chives
Allium schoenoprasum
18 Mar – 1 Apr
2 Jun
6-8 wk
13 May
14 Jul
0 wk
14 May
4 Jul
0 wk
Spearmint
Mentha spicata
18 Feb – 18 Mar
19 May
8-12 wk
13 May
14 Jul
0 wk
7 Jun
4 Jul
4 wk after
Coriander
Coriandrum sativum
13 May
5 Aug
0 wk
26 May
26 Jul
2 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
4 May
8-10 wk
18 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
4 – 18 Mar
9 May
8-10 wk
13 May
4 Jul
0 wk
Oregano
Origanum vulgare
18 Mar – 1 Apr
23 May
6-8 wk
13 May
4 Jul
0 wk
7 Jun
24 Jun
4 wk after
Parsley
Petroselinum crispum
18 Mar – 1 Apr
23 May
6-8 wk
13 May
4 Jul
0 wk
14 May
24 Jun
0 wk
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
25 Mar
10-14 wk
18 May
3 Jun
1 wk after

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
5 – 12 May
22 May
3-4 wk
2 Jun
12 Jun
3 wk after
Cornflower
Centaurea cyanus
13 May
14 Jul
0 wk
14 May
4 Jul
0 wk
Statice
Limonium sinuatum
24 Mar – 7 Apr
15 Apr
8-10 wk
2 Jun
10 Jun
3 wk after
Sweet William
Dianthus barbatus
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
23 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
29 Apr
6-8 wk
2 Jun
10 Jun
3 wk after
19 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
5 May
6-8 wk
26 May
16 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
19 May
4-8 wk
7 Jun
16 Jun
4 wk after
7 Jun
4 wk after
Foxglove
Digitalis purpurea
4 – 18 Mar
8-10 wk
13 May
0 wk
26 May
2 wk after
Busy lizzie
Impatiens walleriana
26 Mar – 23 Apr
2 Jun
8-12 wk
18 Jun
28 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
9 May
6-8 wk
2 Jun
20 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
3 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
11 Apr
8-10 wk
18 May
6 Jun
1 wk after
Love in a mist
Nigella damascena
13 May
25 Jun
0 wk
14 May
15 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
28 Mar – 11 Apr
30 Apr
6-8 wk
23 May
11 Jun
1 wk after
2 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
11 Apr
8-12 wk
18 May
6 Jun
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
20 Feb – 20 Mar
20 Mar
8-12 wk
15 May
15 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
28 Feb – 28 Mar
21 Apr
8-12 wk
23 May
16 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
28 Mar – 11 Apr
5 May
6-8 wk
23 May
16 Jun
1 wk after
Corn poppy
Papaver rhoeas
13 May
10 Jul
0 wk
14 May
30 Jun
0 wk
Snapdragon
Antirrhinum majus
18 Feb – 18 Mar
5 May
8-12 wk
13 May
30 Jun
0 wk
23 May
20 Jun
1 wk after
Flossflower
Ageratum houstonianum
9 – 23 Apr
25 Apr
8-10 wk
18 Jun
20 Jun
5 wk after
Sweet pea
Lathyrus odoratus
18 Mar – 8 Apr
30 May
5-8 wk
13 May
4 Jul
0 wk
Stock
Matthiola incana
18 Mar – 1 Apr
29 May
6-8 wk
13 May
10 Jul
0 wk
26 May
30 Jun
2 wk after
Wormwood
Artemisia absinthium
18 Mar – 1 Apr
3 May
6-8 wk
13 May
14 Jun
0 wk
26 May
4 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
11 – 25 Apr
14 May
4-6 wk
23 May
11 Jun
1 wk after
Garden pansy
Viola × wittrockiana
4 – 18 Mar
19 May
8-10 wk
13 May
14 Jul
0 wk
23 May
4 Jul
1 wk after
Petunia
Petunia
10 Mar – 7 Apr
15 Apr
8-12 wk
2 Jun
10 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
25 Apr
6-8 wk
18 May
6 Jun
1 wk after
25 Jun
6 wk after
Common zinnia
Zinnia elegans
21 Apr – 5 May
15 May
4-6 wk
2 Jun
12 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
28 Apr – 12 May
22 May
3-5 wk
2 Jun
12 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
19 May
4-6 wk
2 Jun
16 Jun
3 wk after
25 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
26 Mar – 23 Apr
7 May
8-12 wk
18 Jun
2 Jul
5 wk after
Bee balm
Monarda didyma
18 Feb – 18 Mar
15 Apr
8-12 wk
13 May
10 Jun
0 wk
7 Jun
4 wk after
Yarrow
Achillea millefolium
18 Mar – 1 Apr
3 Apr
6-8 wk
13 May
15 May
0 wk
26 May
2 wk after
Safflower
Carthamus tinctorius
13 May
14 Jun
0 wk
14 May
4 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
18 Mar – 1 Apr
23 May
6-8 wk
13 May
4 Jul
0 wk
27 Apr
24 Jun
2 wk before
Bishop's flower
Ammi majus
1 – 15 Apr
2 Jun
4-6 wk
13 May
30 Jun
0 wk
26 May
20 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
28 Feb – 14 Mar
24 Mar
10-12 wk
23 May
2 Jun
1 wk after
Sunflower
Helianthus annuus
5 – 12 May
2 Jun
3-4 wk
2 Jun
23 Jun
3 wk after
7 Jun
13 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
22 May
6-8 wk
2 Jun
3 Jul
3 wk after
25 Jun
6 wk after
Annual phlox
Phlox drummondii
28 Mar – 11 Apr
9 May
6-8 wk
23 May
20 Jun
1 wk after
25 Jun
6 wk after
Hollyhock
Alcea rosea
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
26 May
2 wk after
Alpine delphinium
Delphinium elatum
18 Feb – 18 Mar
15 Apr
8-12 wk
13 May
10 Jun
0 wk
7 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Apr
9 May
6-8 wk
2 Jun
20 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
12 May
6-8 wk
18 May
23 Jun
1 wk after
25 Jun
6 wk after
Wood sage
Salvia nemorosa
4 – 18 Mar
5 Apr
8-10 wk
13 May
31 May
0 wk
7 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
24 Mar – 21 Apr
1 May
6-10 wk
2 Jun
12 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
13 May
9 Jul
0 wk
14 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
16 Apr
8-10 wk
2 Jun
11 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
18 Mar – 1 Apr
3 May
6-8 wk
13 May
14 Jun
0 wk
26 May
4 Jun
2 wk after