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Method
Rel. frost
Last spring frost (0°C) 20 May Frost 9 of 10 years · 20 years of data
Frost-free season 92 days 20 May – 20 Aug
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
16 Jun
5-7 wk
20 May
21 Jul
0 wk
24 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
28 Jun
4-6 wk
20 May
26 Jul
0 wk
24 May
16 Jul
1 wk after
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
11 Jun
5-7 wk
20 May
16 Jul
0 wk
20 May
6 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
25 May
4-5 wk
2 Jun
22 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)
Fleece
25 Feb – 25 Mar
14 Mar
8-12 wk
20 May
0 wk
30 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
1 wk after
24 May
1 wk after
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
21 Jun
3-4 wk
22 May
12 Jul
0 wk
10 Jun
2 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
28 Jun
0 wk
20 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
11 Jun
5-7 wk
20 May
16 Jul
0 wk
20 May
6 Jul
0 wk
Potato
Solanum tuberosum
24 Apr – 8 May
4 May
4-6 wk
5 Jun
2 wk after
5 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
13 Jun
5-7 wk
20 May
18 Jul
0 wk
24 May
8 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
28 Apr – 5 May
3-4 wk
26 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
22 – 29 Apr
19 May
3-4 wk
20 May
9 Jun
0 wk
30 May
30 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
2 Jul
3-4 wk
20 May
23 Jul
0 wk
24 May
13 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
13 May
2-4 wk
20 May
27 May
0 wk
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
1 wk after
24 May
1 wk after
Spinach
Spinacia oleracea
22 – 29 Apr
25 Jul
3-4 wk
20 May
15 Aug
0 wk
16 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
21 Jun – 5 Jul
4-6 wk
2 Aug
11 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
10 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
23 Jun
4-6 wk
20 May
21 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
17 Jun
3-4 wk
20 May
8 Jul
0 wk
24 May
28 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
Season too short
14 – 28 Apr
4-6 wk
26 May
1 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
13 May
8-10 wk
20 May
8 Jul
0 wk
24 Jun
28 Jun
5 wk after
Dill
Anethum graveolens
24 May
12 Jul
1 wk after
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
4 Jun
6-8 wk
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
Spearmint
Mentha spicata
25 Feb – 25 Mar
21 May
8-12 wk
20 May
16 Jul
0 wk
24 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
20 May
1 Aug
0 wk
10 Jun
22 Jul
3 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
6 May
8-10 wk
22 May
1 Jul
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
11 May
8-10 wk
20 May
6 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
24 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
24 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
Fleece
11 Feb – 11 Mar
26 Mar
10-14 wk
20 May
4 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
Season too short
28 Apr – 5 May
3-4 wk
26 May
1 wk after
Cornflower
Centaurea cyanus
20 May
16 Jul
0 wk
24 May
6 Jul
1 wk after
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
5 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
25 Mar – 8 Apr
2 Apr
6-8 wk
20 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
4 Apr – 2 May
16 Apr
4-8 wk
30 May
1 wk after
30 May
1 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
10 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Season too short
3 – 31 Mar
28 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
13 – 27 Mar
7 Apr
8-10 wk
22 May
2 Jun
0 wk
Love in a mist
Nigella damascena
20 May
23 Jun
0 wk
24 May
13 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
7 Apr
8-12 wk
22 May
2 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
25 Feb – 25 Mar
22 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
8 Jul
0 wk
24 May
28 Jun
1 wk after
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
3 May
8-12 wk
20 May
28 Jun
0 wk
5 Jun
18 Jun
2 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
1 Jun
5-8 wk
20 May
6 Jul
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
27 May
6-8 wk
20 May
8 Jul
0 wk
10 Jun
28 Jun
3 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
10 Jun
3 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
21 May
8-10 wk
20 May
16 Jul
0 wk
5 Jun
6 Jul
2 wk after
Petunia
Petunia
Season too short
25 Feb – 25 Mar
8-12 wk
20 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
21 Apr
6-8 wk
22 May
2 Jun
0 wk
8 Jul
7 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
Greenhouse
8 – 22 Apr
16 Apr
4-6 wk
20 May
0 wk
10 Jun
3 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
13 Apr
8-12 wk
20 May
8 Jun
0 wk
24 Jun
5 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
5 Apr
6-8 wk
20 May
0 wk
10 Jun
3 wk after
Safflower
Carthamus tinctorius
20 May
16 Jun
0 wk
24 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
25 May
6-8 wk
20 May
6 Jul
0 wk
2 May
26 Jun
3 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
31 May
4-6 wk
20 May
28 Jun
0 wk
10 Jun
18 Jun
3 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
3 Jun
3-4 wk
26 May
24 Jun
1 wk after
10 Jun
14 Jun
3 wk after
China aster
Callistephus chinensis
Fleece
31 Mar – 14 Apr
23 May
6-8 wk
26 May
4 Jul
1 wk after
24 Jun
24 Jun
5 wk after
Annual phlox
Phlox drummondii
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
10 Jun
3 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
13 Apr
8-12 wk
20 May
8 Jun
0 wk
24 Jun
5 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
8 Jul
7 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
3 Apr
8-10 wk
20 May
29 May
0 wk
24 Jun
5 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
4 Jul
0 wk
24 May
24 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
17 – 31 Mar
27 Apr
8-10 wk
26 May
22 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
10 Jun
3 wk after