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Method
Rel. frost
Last spring frost (0°C) 20 May Frost 3 of 4 years · 20 years of data
Frost-free season 103 days 20 May – 31 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)
1 – 15 Apr
14 Jun
5-7 wk
20 May
19 Jul
0 wk
24 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
26 Jun
4-6 wk
20 May
24 Jul
0 wk
24 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
3 – 31 Mar
31 Mar
8-12 wk
26 May
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
9 Jun
5-7 wk
20 May
14 Jul
0 wk
20 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
5 – 12 May
25 May
3-4 wk
2 Jun
15 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
28 Apr – 5 May
22 May
4-5 wk
2 Jun
19 Jun
2 wk after
24 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Feb – 25 Mar
19 Mar
8-12 wk
20 May
0 wk
10 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
3 Jun
1 wk after
24 May
24 May
1 wk after
Maize
Zea mays
Fleece
28 Apr – 5 May
15 May
3-4 wk
26 May
5 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
18 Jun
3-4 wk
22 May
9 Jul
0 wk
10 Jun
29 Jun
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
30 Jun
0 wk
20 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
9 Jun
5-7 wk
20 May
14 Jul
0 wk
20 May
4 Jul
0 wk
Potato
Solanum tuberosum
24 Apr – 8 May
17 May
4-6 wk
5 Jun
14 Jun
2 wk after
5 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
15 Jun
5-7 wk
20 May
20 Jul
0 wk
24 May
10 Jul
1 wk after
Pumpkin
Cucurbita pepo
24 – 31 May
30 May
3-4 wk
21 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Apr – 1 May
25 May
3-4 wk
22 May
15 Jun
0 wk
10 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
21 Jun
4-6 wk
20 May
19 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
4 Jul
3-4 wk
20 May
25 Jul
0 wk
24 May
15 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
21 Jun
4-6 wk
20 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
22 May
2-4 wk
20 May
5 Jun
0 wk
20 May
26 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
3 Jun
1 wk after
24 May
24 May
1 wk after
Spinach
Spinacia oleracea
22 – 29 Apr
23 Jul
3-4 wk
20 May
13 Aug
0 wk
16 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
21 Jun – 5 Jul
4-6 wk
2 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
31 Mar – 14 Apr
24 Apr
6-8 wk
26 May
5 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
5 – 19 May
1 Jun
2-4 wk
2 Jun
15 Jun
2 wk after
8 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
21 Jun
4-6 wk
20 May
19 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
19 Jun
3-4 wk
20 May
10 Jul
0 wk
24 May
30 Jun
1 wk after

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
22 May
4-6 wk
2 Jun
19 Jun
2 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
15 May
8-10 wk
20 May
10 Jul
0 wk
24 Jun
30 Jun
5 wk after
Dill
Anethum graveolens
24 May
9 Jul
1 wk after
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
2 Jun
6-8 wk
20 May
14 Jul
0 wk
24 May
4 Jul
1 wk after
Spearmint
Mentha spicata
25 Feb – 25 Mar
19 May
8-12 wk
20 May
14 Jul
0 wk
24 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
20 May
29 Jul
0 wk
10 Jun
19 Jul
3 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
4 May
8-10 wk
22 May
29 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
9 May
8-10 wk
20 May
4 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
23 May
6-8 wk
20 May
4 Jul
0 wk
24 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
23 May
6-8 wk
20 May
4 Jul
0 wk
24 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
13 Feb – 13 Mar
18 Mar
10-14 wk
22 May
27 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
5 – 12 May
29 May
3-4 wk
2 Jun
19 Jun
2 wk after
Cornflower
Centaurea cyanus
20 May
14 Jul
0 wk
24 May
4 Jul
1 wk after
Statice
Limonium sinuatum
24 Mar – 7 Apr
18 Apr
8-10 wk
2 Jun
13 Jun
2 wk after
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
5 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
2 May
6-8 wk
2 Jun
13 Jun
2 wk after
2 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
5 – 19 Apr
7 May
6-8 wk
31 May
18 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
29 Apr – 27 May
21 May
4-8 wk
24 Jun
5 wk after
24 Jun
5 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
10 Jun
3 wk after
Busy lizzie
Impatiens walleriana
29 Mar – 26 Apr
9 Jun
8-12 wk
21 Jun
4 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
12 May
6-8 wk
2 Jun
23 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
22 Apr
4-6 wk
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Mar
4 Apr
8-10 wk
22 May
30 May
0 wk
Love in a mist
Nigella damascena
20 May
25 Jun
0 wk
24 May
15 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
31 Mar – 14 Apr
30 Apr
6-8 wk
26 May
11 Jun
1 wk after
18 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
4 Apr
8-12 wk
22 May
30 May
0 wk
Cardoon
Cynara cardunculus
Greenhouse
25 Feb – 25 Mar
20 Mar
8-12 wk
20 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
10 Mar – 7 Apr
14 Apr
8-12 wk
2 Jun
9 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
7 – 21 Apr
28 Apr
6-8 wk
2 Jun
9 Jun
2 wk after
Corn poppy
Papaver rhoeas
20 May
10 Jul
0 wk
24 May
30 Jun
1 wk after
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
5 May
8-12 wk
20 May
30 Jun
0 wk
5 Jun
20 Jun
2 wk after
Flossflower
Ageratum houstonianum
12 – 26 Apr
28 Apr
8-10 wk
21 Jun
23 Jun
5 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
30 May
5-8 wk
20 May
4 Jul
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
29 May
6-8 wk
20 May
10 Jul
0 wk
10 Jun
30 Jun
3 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
3 May
6-8 wk
20 May
14 Jun
0 wk
10 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
14 – 28 Apr
16 May
4-6 wk
26 May
13 Jun
1 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
19 May
8-10 wk
20 May
14 Jul
0 wk
5 Jun
4 Jul
2 wk after
Petunia
Petunia
10 Mar – 7 Apr
18 Apr
8-12 wk
2 Jun
13 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
18 Apr
6-8 wk
22 May
30 May
0 wk
8 Jul
7 wk after
Common zinnia
Zinnia elegans
21 Apr – 5 May
22 May
4-6 wk
2 Jun
19 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
28 Apr – 12 May
29 May
3-5 wk
2 Jun
19 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
21 May
4-6 wk
2 Jun
18 Jun
2 wk after
8 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
29 Mar – 26 Apr
14 May
8-12 wk
21 Jun
9 Jul
5 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
15 Apr
8-12 wk
20 May
10 Jun
0 wk
24 Jun
5 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
3 Apr
6-8 wk
20 May
0 wk
10 Jun
3 wk after
Safflower
Carthamus tinctorius
20 May
14 Jun
0 wk
24 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
23 May
6-8 wk
20 May
4 Jul
0 wk
2 May
24 Jun
3 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
2 Jun
4-6 wk
20 May
30 Jun
0 wk
10 Jun
20 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
3 – 17 Mar
26 Mar
10-12 wk
26 May
4 Jun
1 wk after
Sunflower
Helianthus annuus
5 – 12 May
26 May
3-4 wk
2 Jun
16 Jun
2 wk after
24 Jun
5 wk after
China aster
Callistephus chinensis
7 – 21 Apr
15 May
6-8 wk
2 Jun
26 Jun
2 wk after
8 Jul
7 wk after
Annual phlox
Phlox drummondii
31 Mar – 14 Apr
12 May
6-8 wk
26 May
23 Jun
1 wk after
8 Jul
7 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
10 Jun
3 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
15 Apr
8-12 wk
20 May
10 Jun
0 wk
24 Jun
5 wk after
African marigold
Tagetes erecta
7 – 21 Apr
12 May
6-8 wk
2 Jun
23 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
5 May
6-8 wk
22 May
16 Jun
0 wk
8 Jul
7 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
5 Apr
8-10 wk
20 May
31 May
0 wk
24 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
24 Mar – 21 Apr
8 May
6-10 wk
2 Jun
19 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
20 May
7 Jul
0 wk
24 May
27 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
16 Apr
8-10 wk
2 Jun
11 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
3 May
6-8 wk
20 May
14 Jun
0 wk
10 Jun
3 wk after