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Method
Rel. frost
Last spring frost (0°C) 5 May Frost 3 of 4 years · 20 years of data
Frost-free season 139 days 5 May – 21 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)
17 – 31 Mar
12 Jun
5-7 wk
5 May
17 Jul
0 wk
6 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
24 Mar – 7 Apr
24 Jun
4-6 wk
5 May
22 Jul
0 wk
6 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
2 – 30 Mar
26 Mar
8-12 wk
25 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
17 – 31 Mar
7 Jun
5-7 wk
5 May
12 Jul
0 wk
5 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
13 – 20 May
20 May
3-4 wk
10 Jun
10 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 May
25 May
4-5 wk
10 Jun
22 Jun
5 wk after
17 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
18 – 25 May
3-4 wk
15 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
10 Feb – 10 Mar
23 Mar
8-12 wk
5 May
18 May
0 wk
18 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 May
7 Jun
0 wk
6 May
28 May
0 wk
Maize
Zea mays
27 Apr – 4 May
10 May
3-4 wk
25 May
31 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
12 – 19 Apr
1 Jul
3-4 wk
10 May
22 Jul
1 wk after
18 May
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
5 May
2 Jul
0 wk
5 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
17 – 31 Mar
7 Jun
5-7 wk
5 May
12 Jul
0 wk
5 May
2 Jul
0 wk
Potato
Solanum tuberosum
3 – 17 Apr
22 May
4-6 wk
15 May
19 Jun
1 wk after
15 May
9 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
17 – 31 Mar
17 Jun
5-7 wk
5 May
22 Jul
0 wk
6 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
13 – 20 May
30 May
3-4 wk
10 Jun
20 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
12 – 19 Apr
26 May
3-4 wk
10 May
16 Jun
1 wk after
18 May
6 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
24 Mar – 7 Apr
19 Jun
4-6 wk
5 May
17 Jul
0 wk
Lettuce
Lactuca sativa
7 – 14 Apr
6 Jul
3-4 wk
5 May
27 Jul
0 wk
6 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
24 Mar – 7 Apr
19 Jun
4-6 wk
5 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
7 – 21 Apr
27 May
2-4 wk
5 May
10 Jun
0 wk
5 May
31 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
6 May
7 Jun
0 wk
6 May
28 May
0 wk
Spinach
Spinacia oleracea
7 – 14 Apr
21 Jul
3-4 wk
5 May
11 Aug
0 wk
2 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
30 May – 13 Jun
4-6 wk
11 Jul
10 wk after
Garden tomato
Solanum lycopersicum
30 Mar – 13 Apr
19 Apr
6-8 wk
25 May
31 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
27 Apr – 11 May
1 Jun
2-4 wk
25 May
15 Jun
3 wk after
17 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
24 Mar – 7 Apr
19 Jun
4-6 wk
5 May
17 Jul
0 wk
Garden pea
Pisum sativum
7 – 14 Apr
21 Jun
3-4 wk
5 May
12 Jul
0 wk
6 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
29 Apr – 13 May
8 May
4-6 wk
10 Jun
5 wk after
Lemon balm
Melissa officinalis
24 Feb – 10 Mar
17 May
8-10 wk
5 May
12 Jul
0 wk
30 May
2 Jul
4 wk after
Dill
Anethum graveolens
6 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
10 – 24 Mar
31 May
6-8 wk
5 May
12 Jul
0 wk
6 May
2 Jul
0 wk
Spearmint
Mentha spicata
10 Feb – 10 Mar
17 May
8-12 wk
5 May
12 Jul
0 wk
30 May
2 Jul
4 wk after
Coriander
Coriandrum sativum
5 May
11 Aug
0 wk
18 May
1 Aug
2 wk after
Garden sage
Salvia officinalis
1 – 15 Mar
2 May
8-10 wk
10 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
24 Feb – 10 Mar
7 May
8-10 wk
5 May
2 Jul
0 wk
Oregano
Origanum vulgare
10 – 24 Mar
21 May
6-8 wk
5 May
2 Jul
0 wk
30 May
22 Jun
4 wk after
Parsley
Petroselinum crispum
10 – 24 Mar
21 May
6-8 wk
5 May
2 Jul
0 wk
6 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
1 Feb – 1 Mar
30 Mar
10-14 wk
10 May
8 Jun
1 wk after

Annual flowers

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