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