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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 9 of 10 years · 20 years of data
Frost-free season 96 days 21 May – 25 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)
2 – 16 Apr
10 Jun
5-7 wk
21 May
15 Jul
0 wk
22 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
22 Jun
4-6 wk
21 May
20 Jul
0 wk
22 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
18 May
4-5 wk
3 Jun
15 Jun
2 wk after
15 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
26 Feb – 26 Mar
15 Mar
8-12 wk
21 May
0 wk
27 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
22 May
0 wk
22 May
0 wk
Maize
Zea mays
Season too short
23 – 30 Apr
3-4 wk
21 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
14 Jun
3-4 wk
23 May
5 Jul
0 wk
3 Jun
25 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
24 Jun
0 wk
21 May
14 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
23 Apr
4-6 wk
31 May
1 wk after
31 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
9 Jun
5-7 wk
21 May
14 Jul
0 wk
22 May
4 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
4 May
3-4 wk
23 May
25 May
0 wk
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
28 Jun
3-4 wk
21 May
19 Jul
0 wk
22 May
9 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
11 May
2-4 wk
21 May
25 May
0 wk
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
22 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
16 Jul
3-4 wk
21 May
6 Aug
0 wk
18 May
27 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
23 Apr – 7 May
2-4 wk
21 May
0 wk
3 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
13 Jun
3-4 wk
21 May
4 Jul
0 wk
22 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
15 – 29 Apr
4-6 wk
27 May
1 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
9 May
8-10 wk
21 May
4 Jul
0 wk
15 Jun
24 Jun
4 wk after
Dill
Anethum graveolens
22 May
5 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
31 May
6-8 wk
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
15 May
8-12 wk
21 May
10 Jul
0 wk
15 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
21 May
25 Jul
0 wk
3 Jun
15 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
2 May
8-10 wk
23 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
7 May
8-10 wk
21 May
2 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
19 May
6-8 wk
21 May
30 Jun
0 wk
15 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
19 May
6-8 wk
21 May
30 Jun
0 wk
22 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
10 Mar
10-14 wk
23 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
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Cornflower
Centaurea cyanus
21 May
10 Jul
0 wk
22 May
30 Jun
0 wk
Statice
Limonium sinuatum
Season too short
12 – 26 Mar
23 Mar
8-10 wk
21 May
0 wk
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
26 Mar – 9 Apr
6 Apr
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
26 Mar – 9 Apr
7 Apr
6-8 wk
21 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
1 – 29 Apr
21 Apr
4-8 wk
27 May
1 wk after
27 May
1 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
4 Mar – 1 Apr
7 May
8-12 wk
27 May
2 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
26 Mar – 9 Apr
16 Apr
6-8 wk
21 May
28 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
31 Mar
8-10 wk
23 May
26 May
0 wk
Love in a mist
Nigella damascena
21 May
19 Jun
0 wk
22 May
9 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
26 Mar – 9 Apr
27 Mar
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
31 Mar
8-12 wk
23 May
26 May
0 wk
Cardoon
Cynara cardunculus
Season too short
26 Feb – 26 Mar
13 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
1 – 15 Apr
6-8 wk
27 May
1 wk after
Corn poppy
Papaver rhoeas
21 May
4 Jul
0 wk
22 May
24 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
29 Apr
8-12 wk
21 May
24 Jun
0 wk
31 May
14 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
18 Mar – 1 Apr
2 Apr
8-10 wk
27 May
28 May
1 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
26 May
5-8 wk
21 May
30 Jun
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
23 May
6-8 wk
21 May
4 Jul
0 wk
3 Jun
24 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
15 – 29 Apr
4-6 wk
27 May
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
17 May
8-10 wk
21 May
12 Jul
0 wk
31 May
2 Jul
1 wk after
Petunia
Petunia
Season too short
26 Feb – 26 Mar
23 Mar
8-12 wk
21 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
14 Apr
6-8 wk
23 May
26 May
0 wk
3 Jul
6 wk after
Common zinnia
Zinnia elegans
Season too short
9 – 23 Apr
19 Apr
4-6 wk
21 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
22 Apr – 6 May
3-5 wk
27 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
9 – 23 Apr
21 Apr
4-6 wk
21 May
0 wk
3 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
11 Mar – 8 Apr
8-12 wk
3 Jun
2 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
9 Apr
8-12 wk
21 May
4 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
1 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
7 Jun
0 wk
22 May
28 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
5 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
27 May
4-6 wk
21 May
24 Jun
0 wk
3 Jun
14 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
4 – 18 Mar
10-12 wk
27 May
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
18 May
3-4 wk
3 Jun
8 Jun
2 wk after
15 Jun
4 wk after
China aster
Callistephus chinensis
8 – 22 Apr
7 May
6-8 wk
3 Jun
18 Jun
2 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
26 Mar – 9 Apr
16 Apr
6-8 wk
21 May
28 May
0 wk
3 Jun
2 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
9 Apr
8-12 wk
21 May
4 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
26 Mar – 9 Apr
16 Apr
6-8 wk
21 May
28 May
0 wk
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
27 Apr
6-8 wk
23 May
8 Jun
0 wk
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
30 Mar
8-10 wk
21 May
25 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
18 Mar – 15 Apr
6-10 wk
27 May
1 wk after
California goldenpoppy
Eschscholzia californica
21 May
30 Jun
0 wk
22 May
20 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
20 Apr
8-10 wk
27 May
15 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after