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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 105 days 18 May – 31 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
14 Jun
5-7 wk
18 May
19 Jul
0 wk
22 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
26 Jun
4-6 wk
18 May
24 Jul
0 wk
22 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
1 – 29 Mar
24 Mar
8-12 wk
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
9 Jun
5-7 wk
18 May
14 Jul
0 wk
18 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
26 Apr – 3 May
6 Jun
3-4 wk
24 May
27 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
26 Apr – 3 May
22 May
4-5 wk
31 May
19 Jun
2 wk after
22 Jun
5 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
17 Mar
8-12 wk
18 May
0 wk
8 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
1 Jun
1 wk after
22 May
22 May
1 wk after
Maize
Zea mays
Greenhouse
20 – 27 Apr
27 May
3-4 wk
18 May
17 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
18 Jun
3-4 wk
20 May
9 Jul
0 wk
8 Jun
29 Jun
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
28 Jun
0 wk
18 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
9 Jun
5-7 wk
18 May
14 Jul
0 wk
18 May
4 Jul
0 wk
Potato
Solanum tuberosum
22 Apr – 6 May
16 May
4-6 wk
3 Jun
13 Jun
2 wk after
3 Jun
3 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
13 Jun
5-7 wk
18 May
18 Jul
0 wk
22 May
8 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
3 – 10 May
11 Jun
3-4 wk
31 May
2 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
21 May
3-4 wk
20 May
11 Jun
0 wk
8 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
2 Jul
3-4 wk
18 May
23 Jul
0 wk
22 May
13 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
21 May
2-4 wk
18 May
4 Jun
0 wk
18 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
1 Jun
1 wk after
22 May
22 May
1 wk after
Spinach
Spinacia oleracea
20 – 27 Apr
23 Jul
3-4 wk
18 May
13 Aug
0 wk
14 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
19 Jun – 3 Jul
4-6 wk
31 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
23 Mar – 6 Apr
6 May
6-8 wk
18 May
17 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
26 Apr – 10 May
13 Jun
2-4 wk
24 May
27 Jun
1 wk after
22 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
17 Jun
3-4 wk
18 May
8 Jul
0 wk
22 May
28 Jun
1 wk after

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