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Rel. frost
Last spring frost (0°C) 20 May Frost 9 of 10 years · 20 years of data
Frost-free season 69 days 20 May – 28 Jul
Probability that frost is over

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