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Method
Rel. frost
Last spring frost (0°C) 18 May Frost 3 of 4 years · 20 years of data
Frost-free season 95 days 18 May – 21 Aug
Probability that frost is over

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