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Method
Rel. frost
Last spring frost (0°C) 16 May Frost 3 of 4 years · 20 years of data
Frost-free season 110 days 16 May – 3 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)
28 Mar – 11 Apr
12 Jun
5-7 wk
16 May
17 Jul
0 wk
17 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Apr
24 Jun
4-6 wk
16 May
22 Jul
0 wk
17 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
27 Feb – 27 Mar
29 Mar
8-12 wk
22 May
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
1 – 8 May
23 May
3-4 wk
29 May
13 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
24 Apr – 1 May
26 May
4-5 wk
29 May
23 Jun
2 wk after
10 Jun
13 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
27 May – 3 Jun
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Feb – 21 Mar
18 Mar
8-12 wk
16 May
0 wk
29 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 May
2 Jun
0 wk
17 May
23 May
0 wk
Maize
Zea mays
Fleece
24 Apr – 1 May
13 May
3-4 wk
22 May
3 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
22 Jun
3-4 wk
18 May
13 Jul
0 wk
29 May
3 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
16 May
2 Jul
0 wk
16 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Potato
Solanum tuberosum
14 – 28 Apr
16 May
4-6 wk
26 May
13 Jun
1 wk after
26 May
3 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Mar – 11 Apr
17 Jun
5-7 wk
16 May
22 Jul
0 wk
17 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
20 – 27 May
28 May
3-4 wk
17 Jun
18 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
21 May
3-4 wk
18 May
11 Jun
0 wk
29 May
1 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Apr
6 Jul
3-4 wk
16 May
27 Jul
0 wk
17 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Apr – 2 May
21 May
2-4 wk
16 May
4 Jun
0 wk
16 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 May
2 Jun
0 wk
17 May
23 May
0 wk
Spinach
Spinacia oleracea
18 – 25 Apr
21 Jul
3-4 wk
16 May
11 Aug
0 wk
13 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
10 – 24 Jun
4-6 wk
22 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
27 Mar – 10 Apr
22 Apr
6-8 wk
22 May
3 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
1 – 15 May
30 May
2-4 wk
29 May
13 Jun
2 wk after
28 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Apr
21 Jun
3-4 wk
16 May
12 Jul
0 wk
17 May
2 Jul
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
17 Apr – 1 May
19 May
4-6 wk
29 May
16 Jun
2 wk after
Lemon balm
Melissa officinalis
7 – 21 Mar
17 May
8-10 wk
16 May
12 Jul
0 wk
10 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
17 May
13 Jul
0 wk
Wild chives
Allium schoenoprasum
21 Mar – 4 Apr
31 May
6-8 wk
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Spearmint
Mentha spicata
21 Feb – 21 Mar
17 May
8-12 wk
16 May
12 Jul
0 wk
10 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
16 May
2 Aug
0 wk
29 May
23 Jul
2 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
2 May
8-10 wk
18 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
7 – 21 Mar
7 May
8-10 wk
16 May
2 Jul
0 wk
Oregano
Origanum vulgare
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
10 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
17 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
15 Mar
10-14 wk
18 May
24 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
Fleece
1 – 8 May
26 May
3-4 wk
29 May
16 Jun
2 wk after
Cornflower
Centaurea cyanus
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Statice
Limonium sinuatum
20 Mar – 3 Apr
17 Apr
8-10 wk
29 May
12 Jun
2 wk after
Sweet William
Dianthus barbatus
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
26 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
3 – 17 Apr
1 May
6-8 wk
29 May
12 Jun
2 wk after
22 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
1 – 15 Apr
8 May
6-8 wk
27 May
19 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
15 Apr – 13 May
22 May
4-8 wk
10 Jun
19 Jun
4 wk after
10 Jun
4 wk after
Foxglove
Digitalis purpurea
7 – 21 Mar
8-10 wk
16 May
0 wk
29 May
2 wk after
Busy lizzie
Impatiens walleriana
25 Mar – 22 Apr
6 Jun
8-12 wk
17 Jun
1 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
3 – 17 Apr
11 May
6-8 wk
29 May
22 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
19 Apr
4-6 wk
29 May
2 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
8 Apr
8-10 wk
18 May
3 Jun
0 wk
Love in a mist
Nigella damascena
16 May
27 Jun
0 wk
17 May
17 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
27 Mar – 10 Apr
2 May
6-8 wk
22 May
13 Jun
1 wk after
5 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
8 Apr
8-12 wk
18 May
3 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
21 Feb – 21 Mar
18 Mar
8-12 wk
16 May
0 wk
Regal-foxtail
Ptilotus nobilis
Fleece
6 Mar – 3 Apr
11 Apr
8-12 wk
29 May
6 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
3 – 17 Apr
25 Apr
6-8 wk
29 May
6 Jun
2 wk after
Corn poppy
Papaver rhoeas
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
7 May
8-12 wk
16 May
2 Jul
0 wk
26 May
22 Jun
1 wk after
Flossflower
Ageratum houstonianum
8 – 22 Apr
27 Apr
8-10 wk
17 Jun
22 Jun
5 wk after
Sweet pea
Lathyrus odoratus
21 Mar – 11 Apr
28 May
5-8 wk
16 May
2 Jul
0 wk
Stock
Matthiola incana
21 Mar – 4 Apr
31 May
6-8 wk
16 May
12 Jul
0 wk
29 May
2 Jul
2 wk after
Wormwood
Artemisia absinthium
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
10 – 24 Apr
17 May
4-6 wk
22 May
14 Jun
1 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Mar
17 May
8-10 wk
16 May
12 Jul
0 wk
26 May
2 Jul
1 wk after
Petunia
Petunia
6 Mar – 3 Apr
17 Apr
8-12 wk
29 May
12 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
22 Apr
6-8 wk
18 May
3 Jun
0 wk
28 Jun
6 wk after
Common zinnia
Zinnia elegans
17 Apr – 1 May
19 May
4-6 wk
29 May
16 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
24 Apr – 8 May
26 May
3-5 wk
29 May
16 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
17 Apr – 1 May
22 May
4-6 wk
29 May
19 Jun
2 wk after
28 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
25 Mar – 22 Apr
11 May
8-12 wk
17 Jun
6 Jul
5 wk after
Bee balm
Monarda didyma
21 Feb – 21 Mar
17 Apr
8-12 wk
16 May
12 Jun
0 wk
10 Jun
4 wk after
Yarrow
Achillea millefolium
21 Mar – 4 Apr
1 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Safflower
Carthamus tinctorius
16 May
12 Jun
0 wk
17 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
30 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
4 – 18 Apr
4 Jun
4-6 wk
16 May
2 Jul
0 wk
29 May
22 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
27 Feb – 13 Mar
29 Mar
10-12 wk
22 May
7 Jun
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
23 May
3-4 wk
29 May
13 Jun
2 wk after
10 Jun
4 wk after
China aster
Callistephus chinensis
3 – 17 Apr
12 May
6-8 wk
29 May
23 Jun
2 wk after
28 Jun
6 wk after
Annual phlox
Phlox drummondii
27 Mar – 10 Apr
11 May
6-8 wk
22 May
22 Jun
1 wk after
28 Jun
6 wk after
Hollyhock
Alcea rosea
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Alpine delphinium
Delphinium elatum
21 Feb – 21 Mar
17 Apr
8-12 wk
16 May
12 Jun
0 wk
10 Jun
4 wk after
African marigold
Tagetes erecta
3 – 17 Apr
11 May
6-8 wk
29 May
22 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
0 wk
28 Jun
6 wk after
Wood sage
Salvia nemorosa
7 – 21 Mar
7 Apr
8-10 wk
16 May
2 Jun
0 wk
10 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
20 Mar – 17 Apr
5 May
6-10 wk
29 May
16 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
16 May
10 Jul
0 wk
17 May
30 Jun
0 wk
Painted tongue
Salpiglossis sinuata
20 Mar – 3 Apr
11 Apr
8-10 wk
29 May
6 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after