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