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Method
Rel. frost
Last spring frost (0°C) 23 May Frost 9 of 10 years · 20 years of data
Frost-free season 92 days 23 May – 23 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)
4 – 18 Apr
9 Jun
5-7 wk
23 May
14 Jul
0 wk
24 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
21 Jun
4-6 wk
23 May
19 Jul
0 wk
24 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
7 Jun
5-7 wk
23 May
12 Jul
0 wk
23 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
1 – 8 May
3-4 wk
29 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
15 May
4-5 wk
5 Jun
12 Jun
2 wk after
17 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
28 Feb – 28 Mar
23 Mar
8-12 wk
23 May
0 wk
23 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
24 May
0 wk
24 May
0 wk
Maize
Zea mays
Season too short
25 Apr – 2 May
3-4 wk
23 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Apr – 4 May
11 Jun
3-4 wk
25 May
2 Jul
0 wk
5 Jun
22 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
24 Jun
0 wk
23 May
14 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
7 Jun
5-7 wk
23 May
12 Jul
0 wk
23 May
2 Jul
0 wk
Potato
Solanum tuberosum
21 Apr – 5 May
23 Apr
4-6 wk
2 Jun
1 wk after
2 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
9 Jun
5-7 wk
23 May
14 Jul
0 wk
24 May
4 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
1 – 8 May
3-4 wk
29 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
25 Apr – 2 May
17 May
3-4 wk
23 May
7 Jun
0 wk
29 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
19 Jun
4-6 wk
23 May
17 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
28 Jun
3-4 wk
23 May
19 Jul
0 wk
24 May
9 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
19 Jun
4-6 wk
23 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
10 May
2-4 wk
23 May
24 May
0 wk
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 May
0 wk
24 May
0 wk
Spinach
Spinacia oleracea
25 Apr – 2 May
16 Jul
3-4 wk
23 May
6 Aug
0 wk
20 May
27 Jul
0 wk
Sweet potato
Ipomoea batatas
17 Jun – 1 Jul
4-6 wk
29 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
25 Apr – 9 May
2-4 wk
23 May
0 wk
5 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
19 Jun
4-6 wk
23 May
17 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
13 Jun
3-4 wk
23 May
4 Jul
0 wk
24 May
24 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
17 Apr – 1 May
4-6 wk
29 May
1 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
9 May
8-10 wk
23 May
4 Jul
0 wk
17 Jun
24 Jun
4 wk after
Dill
Anethum graveolens
24 May
2 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
31 May
6-8 wk
23 May
12 Jul
0 wk
24 May
2 Jul
0 wk
Spearmint
Mentha spicata
28 Feb – 28 Mar
14 May
8-12 wk
23 May
9 Jul
0 wk
17 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
23 May
22 Jul
0 wk
5 Jun
12 Jul
2 wk after
Garden sage
Salvia officinalis
16 – 30 Mar
2 May
8-10 wk
25 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
7 May
8-10 wk
23 May
2 Jul
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
18 May
6-8 wk
23 May
29 Jun
0 wk
17 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
18 May
6-8 wk
23 May
29 Jun
0 wk
24 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
14 Feb – 14 Mar
22 Mar
10-14 wk
23 May
31 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
1 – 8 May
3-4 wk
29 May
1 wk after
Cornflower
Centaurea cyanus
23 May
9 Jul
0 wk
24 May
29 Jun
0 wk
Statice
Limonium sinuatum
Season too short
14 – 28 Mar
8-10 wk
23 May
0 wk
Sweet William
Dianthus barbatus
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
2 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
24 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
28 Mar – 11 Apr
5 Apr
6-8 wk
23 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
3 Apr – 1 May
19 Apr
4-8 wk
29 May
1 wk after
29 May
1 wk after
Foxglove
Digitalis purpurea
14 – 28 Mar
8-10 wk
23 May
0 wk
5 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Season too short
6 Mar – 3 Apr
30 Mar
8-12 wk
29 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
28 Mar – 11 Apr
4 Apr
6-8 wk
23 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
24 Apr – 8 May
4-6 wk
5 Jun
2 wk after
Chinese lantern
Physalis alkekengi
Fleece
14 – 28 Mar
9 Apr
8-10 wk
23 May
4 Jun
0 wk
Love in a mist
Nigella damascena
23 May
19 Jun
0 wk
24 May
9 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
24 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
28 Feb – 28 Mar
9 Apr
8-12 wk
23 May
4 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
28 Feb – 28 Mar
13 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
3 – 17 Apr
6-8 wk
29 May
1 wk after
Corn poppy
Papaver rhoeas
23 May
4 Jul
0 wk
24 May
24 Jun
0 wk
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
29 Apr
8-12 wk
23 May
24 Jun
0 wk
2 Jun
14 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
20 Mar – 3 Apr
21 Mar
8-10 wk
29 May
1 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
25 May
5-8 wk
23 May
29 Jun
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
23 May
6-8 wk
23 May
4 Jul
0 wk
5 Jun
24 Jun
2 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
1 May
6-8 wk
23 May
12 Jun
0 wk
5 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
17 Apr – 1 May
4-6 wk
29 May
1 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
17 May
8-10 wk
23 May
12 Jul
0 wk
2 Jun
2 Jul
1 wk after
Petunia
Petunia
Season too short
28 Feb – 28 Mar
11 Mar
8-12 wk
23 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
28 Mar – 11 Apr
23 Apr
6-8 wk
23 May
4 Jun
0 wk
17 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
11 – 25 Apr
4-6 wk
23 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
24 Apr – 8 May
3-5 wk
29 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
11 – 25 Apr
19 Apr
4-6 wk
23 May
0 wk
5 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
13 Mar – 10 Apr
8-12 wk
5 Jun
2 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
9 Apr
8-12 wk
23 May
4 Jun
0 wk
17 Jun
4 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
1 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Safflower
Carthamus tinctorius
23 May
7 Jun
0 wk
24 May
28 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
21 May
6-8 wk
23 May
2 Jul
0 wk
7 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
27 May
4-6 wk
23 May
24 Jun
0 wk
5 Jun
14 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
6 – 20 Mar
10-12 wk
29 May
1 wk after
Sunflower
Helianthus annuus
Fleece
1 – 8 May
30 May
3-4 wk
29 May
20 Jun
1 wk after
5 Jun
10 Jun
2 wk after
China aster
Callistephus chinensis
Fleece
3 – 17 Apr
19 May
6-8 wk
29 May
30 Jun
1 wk after
17 Jun
20 Jun
4 wk after
Annual phlox
Phlox drummondii
Greenhouse
28 Mar – 11 Apr
4 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Hollyhock
Alcea rosea
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
9 Apr
8-12 wk
23 May
4 Jun
0 wk
17 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
28 Mar – 11 Apr
4 Apr
6-8 wk
23 May
0 wk
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
19 Apr
6-8 wk
25 May
31 May
0 wk
5 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
30 Mar
8-10 wk
23 May
25 May
0 wk
17 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
20 Mar – 17 Apr
6-10 wk
29 May
1 wk after
California goldenpoppy
Eschscholzia californica
23 May
30 Jun
0 wk
24 May
20 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
20 Mar – 3 Apr
17 Apr
8-10 wk
29 May
12 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
1 May
6-8 wk
23 May
12 Jun
0 wk
5 Jun
2 wk after