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