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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 91 days 21 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)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
22 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
22 May
12 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
Greenhouse
22 – 29 Apr
30 May
4-5 wk
27 May
27 Jun
1 wk after
3 Jun
17 Jun
2 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)
Greenhouse
26 Feb – 26 Mar
13 Mar
8-12 wk
21 May
0 wk
21 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
18 May
22 May
0 wk
18 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
15 Jun
3-4 wk
23 May
6 Jul
0 wk
3 Jun
26 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
27 Jun
0 wk
21 May
17 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
Fleece
10 – 24 Apr
27 Apr
4-6 wk
22 May
25 May
0 wk
22 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
22 May
7 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)
Fleece
23 – 30 Apr
6 May
3-4 wk
21 May
27 May
0 wk
27 May
1 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
1 Jul
3-4 wk
21 May
22 Jul
0 wk
22 May
12 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
4 May
2-4 wk
21 May
0 wk
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
18 May
22 May
0 wk
18 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
21 Jul
3-4 wk
21 May
11 Aug
0 wk
18 May
1 Aug
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
16 Jun
3-4 wk
21 May
7 Jul
0 wk
22 May
27 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
12 May
8-10 wk
21 May
7 Jul
0 wk
15 Jun
27 Jun
4 wk after
Dill
Anethum graveolens
22 May
6 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
17 May
8-12 wk
21 May
12 Jul
0 wk
15 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
26 Jul
0 wk
3 Jun
16 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
21 May
6-8 wk
21 May
2 Jul
0 wk
15 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
22 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
12 Feb – 12 Mar
27 Mar
10-14 wk
21 May
5 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
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Cornflower
Centaurea cyanus
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Statice
Limonium sinuatum
Season too short
12 – 26 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
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
26 Mar – 9 Apr
2 Apr
6-8 wk
21 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
1 – 29 Apr
16 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
Season too short
4 Mar – 1 Apr
29 Mar
8-12 wk
27 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
26 Mar – 9 Apr
6-8 wk
21 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
Fleece
12 – 26 Mar
12 Apr
8-10 wk
21 May
7 Jun
0 wk
Love in a mist
Nigella damascena
21 May
22 Jun
0 wk
22 May
12 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
26 Feb – 26 Mar
12 Apr
8-12 wk
21 May
7 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
26 Feb – 26 Mar
18 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
7 Jul
0 wk
22 May
27 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
2 May
8-12 wk
21 May
27 Jun
0 wk
31 May
17 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
18 Mar – 1 Apr
8-10 wk
27 May
1 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
28 May
5-8 wk
21 May
2 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
0 wk
3 Jun
27 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
8-12 wk
21 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
26 Mar – 9 Apr
26 Apr
6-8 wk
21 May
7 Jun
0 wk
15 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
9 – 23 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
Season too short
9 – 23 Apr
16 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
12 Apr
8-12 wk
21 May
7 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
12 Jun
0 wk
22 May
2 Jun
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
30 May
4-6 wk
21 May
27 Jun
0 wk
3 Jun
17 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
4 – 18 Mar
10-12 wk
27 May
1 wk after
Sunflower
Helianthus annuus
Fleece
29 Apr – 6 May
4 Jun
3-4 wk
27 May
25 Jun
1 wk after
3 Jun
15 Jun
2 wk after
China aster
Callistephus chinensis
Fleece
1 – 15 Apr
24 May
6-8 wk
27 May
5 Jul
1 wk after
15 Jun
25 Jun
4 wk after
Annual phlox
Phlox drummondii
Season too short
26 Mar – 9 Apr
6-8 wk
21 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
12 Apr
8-12 wk
21 May
7 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
30 Apr
6-8 wk
23 May
11 Jun
0 wk
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
2 Apr
8-10 wk
21 May
28 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
5 Jul
0 wk
22 May
25 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
21 Apr
8-10 wk
27 May
16 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