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Method
Rel. frost
Last spring frost (0°C) 23 May Frost 3 of 4 years · 20 years of data
Frost-free season 121 days 23 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)
4 – 18 Apr
11 Jun
5-7 wk
23 May
16 Jul
0 wk
24 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
23 Jun
4-6 wk
23 May
21 Jul
0 wk
24 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
6 Jun
5-7 wk
23 May
11 Jul
0 wk
23 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
1 – 8 May
3-4 wk
29 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
1 Jun
4-5 wk
5 Jun
29 Jun
2 wk after
17 Jun
19 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
28 Feb – 28 Mar
14 Mar
8-12 wk
23 May
0 wk
23 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
14 May
29 May
1 wk before
14 May
19 May
1 wk before
Maize
Zea mays
Season too short
25 Apr – 2 May
3-4 wk
23 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Apr – 4 May
28 Jun
3-4 wk
25 May
19 Jul
0 wk
5 Jun
9 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
1 Jul
0 wk
23 May
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
6 Jun
5-7 wk
23 May
11 Jul
0 wk
23 May
1 Jul
0 wk
Potato
Solanum tuberosum
Season too short
8 – 22 Apr
11 May
4-6 wk
20 May
8 Jun
0 wk
20 May
29 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
16 Jun
5-7 wk
23 May
21 Jul
0 wk
24 May
11 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
1 – 8 May
15 Jun
3-4 wk
29 May
6 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
25 Apr – 2 May
30 Apr
3-4 wk
23 May
0 wk
29 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
18 Jun
4-6 wk
23 May
16 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
5 Jul
3-4 wk
23 May
26 Jul
0 wk
24 May
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
18 Jun
4-6 wk
23 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
9 – 23 Apr
21 May
2-4 wk
7 May
4 Jun
2 wk before
7 May
25 May
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
14 May
29 May
1 wk before
14 May
19 May
1 wk before
Spinach
Spinacia oleracea
25 Apr – 2 May
20 Jul
3-4 wk
23 May
10 Aug
0 wk
20 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
17 Jun – 1 Jul
4-6 wk
29 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
25 Apr – 9 May
17 Jun
2-4 wk
23 May
1 Jul
0 wk
5 Jun
21 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
18 Jun
4-6 wk
23 May
16 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
20 Jun
3-4 wk
23 May
11 Jul
0 wk
24 May
1 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
Greenhouse
17 Apr – 1 May
24 May
4-6 wk
29 May
21 Jun
1 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
16 May
8-10 wk
23 May
11 Jul
0 wk
17 Jun
1 Jul
4 wk after
Dill
Anethum graveolens
24 May
19 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
30 May
6-8 wk
23 May
11 Jul
0 wk
24 May
1 Jul
0 wk
Spearmint
Mentha spicata
28 Feb – 28 Mar
16 May
8-12 wk
23 May
11 Jul
0 wk
17 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
23 May
8 Aug
0 wk
5 Jun
29 Jul
2 wk after
Garden sage
Salvia officinalis
16 – 30 Mar
1 May
8-10 wk
25 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
6 May
8-10 wk
23 May
1 Jul
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
20 May
6-8 wk
23 May
1 Jul
0 wk
17 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
20 May
6-8 wk
23 May
1 Jul
0 wk
24 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
16 Feb – 16 Mar
24 Mar
10-14 wk
25 May
2 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
1 – 8 May
31 May
3-4 wk
29 May
21 Jun
1 wk after
Cornflower
Centaurea cyanus
23 May
11 Jul
0 wk
24 May
1 Jul
0 wk
Statice
Limonium sinuatum
Fleece
20 Mar – 3 Apr
20 Apr
8-10 wk
29 May
15 Jun
1 wk after
Sweet William
Dianthus barbatus
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
2 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
3 – 17 Apr
4 May
6-8 wk
29 May
15 Jun
1 wk after
12 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
30 Mar – 13 Apr
10 May
6-8 wk
25 May
21 Jun
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
3 Apr – 1 May
3 Jun
4-8 wk
29 May
1 Jul
1 wk after
29 May
21 Jun
1 wk after
Foxglove
Digitalis purpurea
14 – 28 Mar
8-10 wk
23 May
0 wk
5 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
13 Mar – 10 Apr
11 Jun
8-12 wk
5 Jun
6 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
3 – 17 Apr
14 May
6-8 wk
29 May
25 Jun
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
24 Apr – 8 May
4-6 wk
5 Jun
2 wk after
Chinese lantern
Physalis alkekengi
16 – 30 Mar
14 Apr
8-10 wk
25 May
9 Jun
0 wk
Love in a mist
Nigella damascena
23 May
26 Jun
0 wk
24 May
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Greenhouse
28 Mar – 11 Apr
6 May
6-8 wk
23 May
17 Jun
0 wk
24 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Mar
14 Apr
8-12 wk
25 May
9 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
28 Feb – 28 Mar
17 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
6 Mar – 3 Apr
16 Apr
8-12 wk
29 May
11 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
3 – 17 Apr
30 Apr
6-8 wk
29 May
11 Jun
1 wk after
Corn poppy
Papaver rhoeas
23 May
11 Jul
0 wk
24 May
1 Jul
0 wk
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
6 May
8-12 wk
23 May
1 Jul
0 wk
2 Jun
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Mar – 10 Apr
30 Apr
8-10 wk
5 Jun
25 Jun
2 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
27 May
5-8 wk
23 May
1 Jul
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
30 May
6-8 wk
23 May
11 Jul
0 wk
5 Jun
1 Jul
2 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
30 Apr
6-8 wk
23 May
11 Jun
0 wk
5 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
17 Apr – 1 May
9 May
4-6 wk
29 May
6 Jun
1 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
16 May
8-10 wk
23 May
11 Jul
0 wk
2 Jun
1 Jul
1 wk after
Petunia
Petunia
Fleece
6 Mar – 3 Apr
20 Apr
8-12 wk
29 May
15 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Mar – 13 Apr
28 Apr
6-8 wk
25 May
9 Jun
0 wk
5 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
17 Apr – 1 May
24 May
4-6 wk
29 May
21 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
24 Apr – 8 May
31 May
3-5 wk
29 May
21 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
17 Apr – 1 May
24 May
4-6 wk
29 May
21 Jun
1 wk after
17 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
13 Mar – 10 Apr
16 May
8-12 wk
5 Jun
11 Jul
2 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
16 Apr
8-12 wk
23 May
11 Jun
0 wk
17 Jun
4 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
31 Mar
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Safflower
Carthamus tinctorius
23 May
11 Jun
0 wk
24 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
20 May
6-8 wk
23 May
1 Jul
0 wk
7 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
3 Jun
4-6 wk
23 May
1 Jul
0 wk
5 Jun
21 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
6 – 20 Mar
23 Mar
10-12 wk
29 May
1 Jun
1 wk after
Sunflower
Helianthus annuus
8 – 15 May
1 Jun
3-4 wk
5 Jun
22 Jun
2 wk after
17 Jun
4 wk after
China aster
Callistephus chinensis
10 – 24 Apr
21 May
6-8 wk
5 Jun
2 Jul
2 wk after
5 Jul
6 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
29 Apr
6-8 wk
29 May
10 Jun
1 wk after
5 Jul
6 wk after
Hollyhock
Alcea rosea
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
5 Jun
2 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
16 Apr
8-12 wk
23 May
11 Jun
0 wk
17 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
3 – 17 Apr
14 May
6-8 wk
29 May
25 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
11 May
6-8 wk
25 May
22 Jun
0 wk
5 Jul
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
6 Apr
8-10 wk
23 May
1 Jun
0 wk
17 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
20 Mar – 17 Apr
10 May
6-10 wk
29 May
21 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
23 May
11 Jul
0 wk
24 May
1 Jul
0 wk
Painted tongue
Salpiglossis sinuata
27 Mar – 10 Apr
25 Apr
8-10 wk
5 Jun
20 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
30 Apr
6-8 wk
23 May
11 Jun
0 wk
5 Jun
2 wk after