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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 1 of 10 years · 20 years of data
Frost-free season 137 days 21 May – 5 Oct
Probability that frost is over

90% = 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
17 Jun
5-7 wk
21 May
22 Jul
0 wk
14 May
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
29 Jun
4-6 wk
21 May
27 Jul
0 wk
14 May
17 Jul
1 wk before
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
12 Jun
5-7 wk
21 May
17 Jul
0 wk
9 May
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
29 Apr – 6 May
6 May
3-4 wk
27 May
27 May
1 wk after
Florence Fennel
Foeniculum vulgare
18 – 25 May
9 Jun
4-5 wk
22 Jun
7 Jul
5 wk after
26 Jun
27 Jun
5 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)
26 Feb – 26 Mar
2 Apr
8-12 wk
21 May
28 May
0 wk
31 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 May
17 Jun
1 wk before
14 May
7 Jun
1 wk before
Maize
Zea mays
Greenhouse
23 – 30 Apr
26 Apr
3-4 wk
21 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
6 Jul
3-4 wk
23 May
27 Jul
0 wk
31 May
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
7 Jul
0 wk
9 May
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
9 May
7 Jul
2 wk before
Potato
Solanum tuberosum
14 – 28 Apr
8 Jun
4-6 wk
26 May
6 Jul
1 wk after
26 May
26 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
22 Jun
5-7 wk
21 May
27 Jul
0 wk
14 May
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
Greenhouse
29 Apr – 6 May
29 May
3-4 wk
27 May
19 Jun
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
25 Jun
3-4 wk
23 May
16 Jul
0 wk
31 May
6 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
11 Jul
3-4 wk
21 May
1 Aug
0 wk
14 May
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Apr
3 Jun
2-4 wk
9 May
17 Jun
2 wk before
9 May
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
14 May
17 Jun
1 wk before
14 May
7 Jun
1 wk before
Spinach
Spinacia oleracea
23 – 30 Apr
26 Jul
3-4 wk
21 May
16 Aug
0 wk
3 May
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
17 Jun – 1 Jul
4-6 wk
29 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
26 Mar – 9 Apr
5 Apr
6-8 wk
21 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
29 Apr – 13 May
13 May
2-4 wk
27 May
27 May
1 wk after
11 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
26 Jun
3-4 wk
21 May
17 Jul
0 wk
14 May
7 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
15 – 29 Apr
7 May
4-6 wk
27 May
4 Jun
1 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
22 May
8-10 wk
21 May
17 Jul
0 wk
11 Jun
7 Jul
3 wk after
Dill
Anethum graveolens
14 May
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
5 Jun
6-8 wk
21 May
17 Jul
0 wk
14 May
7 Jul
1 wk before
Spearmint
Mentha spicata
26 Feb – 26 Mar
22 May
8-12 wk
21 May
17 Jul
0 wk
11 Jun
7 Jul
3 wk after
Coriander
Coriandrum sativum
21 May
16 Aug
0 wk
31 May
6 Aug
1 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
7 May
8-10 wk
23 May
2 Jul
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
12 May
8-10 wk
21 May
7 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
0 wk
11 Jun
27 Jun
3 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
0 wk
14 May
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
8 Apr
10-14 wk
23 May
17 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
Greenhouse
29 Apr – 6 May
14 May
3-4 wk
27 May
4 Jun
1 wk after
Cornflower
Centaurea cyanus
21 May
17 Jul
0 wk
14 May
7 Jul
1 wk before
Statice
Limonium sinuatum
Fleece
18 Mar – 1 Apr
14 Apr
8-10 wk
27 May
9 Jun
1 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
26 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
1 – 15 Apr
28 Apr
6-8 wk
27 May
9 Jun
1 wk after
6 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
13 Apr
6-8 wk
1 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
5 Apr – 3 May
19 May
4-8 wk
31 May
16 Jun
1 wk after
31 May
6 Jun
1 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
31 May
1 wk after
Busy lizzie
Impatiens walleriana
30 Mar – 27 Apr
7 May
8-12 wk
22 Jun
2 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
1 – 15 Apr
8 May
6-8 wk
27 May
19 Jun
1 wk after
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
22 Apr
8-10 wk
23 May
17 Jun
0 wk
Love in a mist
Nigella damascena
21 May
2 Jul
0 wk
14 May
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
18 Apr
6-8 wk
27 May
30 May
1 wk after
6 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
22 Apr
8-12 wk
23 May
17 Jun
0 wk
Cardoon
Cynara cardunculus
11 Mar – 8 Apr
23 Mar
8-12 wk
3 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
4 Mar – 1 Apr
30 Mar
8-12 wk
27 May
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
1 – 15 Apr
13 Apr
6-8 wk
27 May
1 wk after
Corn poppy
Papaver rhoeas
21 May
17 Jul
0 wk
14 May
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
12 May
8-12 wk
21 May
7 Jul
0 wk
26 May
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
25 Mar – 8 Apr
24 Apr
8-10 wk
3 Jun
19 Jun
2 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
2 Jun
5-8 wk
21 May
7 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
5 Jun
6-8 wk
21 May
17 Jul
0 wk
31 May
7 Jul
1 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
6 May
6-8 wk
21 May
17 Jun
0 wk
31 May
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
15 – 29 Apr
22 Apr
4-6 wk
27 May
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
22 May
8-10 wk
21 May
17 Jul
0 wk
26 May
7 Jul
1 wk after
Petunia
Petunia
Fleece
4 Mar – 1 Apr
14 Apr
8-12 wk
27 May
9 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
6 May
6-8 wk
23 May
17 Jun
0 wk
26 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
15 – 29 Apr
7 May
4-6 wk
27 May
4 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
22 Apr – 6 May
14 May
3-5 wk
27 May
4 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
15 – 29 Apr
19 May
4-6 wk
27 May
16 Jun
1 wk after
11 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
11 Apr
8-12 wk
22 Jun
5 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
22 Apr
8-12 wk
21 May
17 Jun
0 wk
11 Jun
3 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
6 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Safflower
Carthamus tinctorius
21 May
17 Jun
0 wk
14 May
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
0 wk
12 Apr
27 Jun
6 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
9 Jun
4-6 wk
21 May
7 Jul
0 wk
31 May
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
4 – 18 Mar
18 Mar
10-12 wk
27 May
27 May
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
16 Jun
3-4 wk
3 Jun
7 Jul
2 wk after
11 Jun
27 Jun
3 wk after
China aster
Callistephus chinensis
8 – 22 Apr
5 Jun
6-8 wk
3 Jun
17 Jul
2 wk after
26 Jun
7 Jul
5 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
19 Apr
6-8 wk
27 May
31 May
1 wk after
26 Jun
5 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
22 Apr
8-12 wk
21 May
17 Jun
0 wk
11 Jun
3 wk after
African marigold
Tagetes erecta
Fleece
1 – 15 Apr
8 May
6-8 wk
27 May
19 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
26 May
6-8 wk
23 May
7 Jul
0 wk
26 Jun
27 Jun
5 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
12 Apr
8-10 wk
21 May
7 Jun
0 wk
11 Jun
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
18 Mar – 15 Apr
23 Apr
6-10 wk
27 May
4 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
21 May
17 Jul
0 wk
14 May
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
25 Mar – 8 Apr
12 May
8-10 wk
3 Jun
7 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
6 May
6-8 wk
21 May
17 Jun
0 wk
31 May
7 Jun
1 wk after