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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 3 of 4 years · 20 years of data
Frost-free season 107 days 21 May – 5 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)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
22 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
22 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
9 Mar – 6 Apr
17 Mar
8-12 wk
1 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
4 – 11 May
26 May
3-4 wk
1 Jun
16 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
6 – 13 May
30 May
4-5 wk
10 Jun
27 Jun
3 wk after
15 Jun
17 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)
26 Feb – 26 Mar
26 Mar
8-12 wk
21 May
21 May
0 wk
3 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
10 Jun
0 wk
22 May
31 May
0 wk
Maize
Zea mays
Greenhouse
27 Apr – 4 May
16 May
3-4 wk
25 May
6 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
26 Jun
3-4 wk
27 May
17 Jul
1 wk after
3 Jun
7 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
29 Jun
0 wk
21 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
20 May
4-6 wk
31 May
17 Jun
1 wk after
31 May
7 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
14 Jun
5-7 wk
21 May
19 Jul
0 wk
22 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
13 – 20 May
31 May
3-4 wk
10 Jun
21 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Apr – 6 May
27 May
3-4 wk
27 May
17 Jun
1 wk after
3 Jun
7 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
3 Jul
3-4 wk
21 May
24 Jul
0 wk
22 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
29 May
2-4 wk
21 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
10 Jun
0 wk
22 May
31 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
21 Jul
3-4 wk
21 May
11 Aug
0 wk
18 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
30 Mar – 13 Apr
25 Apr
6-8 wk
25 May
6 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
4 – 18 May
2 Jun
2-4 wk
1 Jun
16 Jun
2 wk after
15 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
18 Jun
3-4 wk
21 May
9 Jul
0 wk
22 May
29 Jun
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
20 Apr – 4 May
22 May
4-6 wk
1 Jun
19 Jun
2 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
14 May
8-10 wk
21 May
9 Jul
0 wk
15 Jun
29 Jun
4 wk after
Dill
Anethum graveolens
22 May
17 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
31 May
6-8 wk
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
17 May
8-12 wk
21 May
12 Jul
0 wk
15 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
6 Aug
0 wk
3 Jun
27 Jul
2 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
2 May
8-10 wk
27 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
12 – 26 Mar
7 May
8-10 wk
21 May
2 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
15 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
22 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
18 Feb – 18 Mar
24 Mar
10-14 wk
27 May
2 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
Greenhouse
4 – 11 May
29 May
3-4 wk
1 Jun
19 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Statice
Limonium sinuatum
Fleece
23 Mar – 6 Apr
21 Apr
8-10 wk
1 Jun
16 Jun
2 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
6 – 20 Apr
5 May
6-8 wk
1 Jun
16 Jun
2 wk after
10 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 Apr
28 Apr
6-8 wk
5 Jun
9 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
8 Apr – 6 May
27 May
4-8 wk
3 Jun
24 Jun
2 wk after
3 Jun
14 Jun
2 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
1 – 29 Apr
27 May
8-12 wk
24 Jun
22 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
15 – 29 Apr
7 May
6-8 wk
10 Jun
18 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
29 Apr – 13 May
4-6 wk
10 Jun
3 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
12 Apr
8-10 wk
27 May
7 Jun
1 wk after
Love in a mist
Nigella damascena
21 May
24 Jun
0 wk
22 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
6 – 20 Apr
25 Apr
6-8 wk
1 Jun
6 Jun
2 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
12 Apr
8-12 wk
27 May
7 Jun
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
2 – 30 Mar
18 Mar
8-12 wk
25 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
9 Mar – 6 Apr
14 Apr
8-12 wk
1 Jun
9 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
6 – 20 Apr
28 Apr
6-8 wk
1 Jun
9 Jun
2 wk after
Corn poppy
Papaver rhoeas
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
4 May
8-12 wk
21 May
29 Jun
0 wk
31 May
19 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
1 – 15 Apr
1 May
8-10 wk
10 Jun
26 Jun
3 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
28 May
5-8 wk
21 May
2 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
0 wk
3 Jun
29 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
20 Apr – 4 May
7 May
4-6 wk
1 Jun
4 Jun
2 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
17 May
8-10 wk
21 May
12 Jul
0 wk
31 May
2 Jul
1 wk after
Petunia
Petunia
Fleece
9 Mar – 6 Apr
21 Apr
8-12 wk
1 Jun
16 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
26 Apr
6-8 wk
27 May
7 Jun
1 wk after
3 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
20 Apr – 4 May
22 May
4-6 wk
1 Jun
19 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
27 Apr – 11 May
29 May
3-5 wk
1 Jun
19 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
20 Apr – 4 May
27 May
4-6 wk
1 Jun
24 Jun
2 wk after
15 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
18 Mar – 15 Apr
14 May
8-12 wk
10 Jun
9 Jul
3 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
1 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
12 Jun
0 wk
22 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
5 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
1 Jun
4-6 wk
21 May
29 Jun
0 wk
3 Jun
19 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
9 – 23 Mar
26 Mar
10-12 wk
1 Jun
4 Jun
2 wk after
Sunflower
Helianthus annuus
13 – 20 May
1 Jun
3-4 wk
10 Jun
22 Jun
3 wk after
15 Jun
4 wk after
China aster
Callistephus chinensis
15 – 29 Apr
21 May
6-8 wk
10 Jun
2 Jul
3 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
6 – 20 Apr
7 May
6-8 wk
1 Jun
18 Jun
2 wk after
3 Jul
6 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
15 – 29 Apr
7 May
6-8 wk
10 Jun
18 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
11 May
6-8 wk
27 May
22 Jun
1 wk after
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
4 Apr
8-10 wk
21 May
30 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
23 Mar – 20 Apr
8 May
6-10 wk
1 Jun
19 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
1 – 15 Apr
16 Apr
8-10 wk
10 Jun
11 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after