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Method
Rel. frost
Last spring frost (0°C) 20 May Normal year · 20 years of data
Frost-free season 136 days 20 May – 3 Oct
Probability that frost is over

50% = 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)
1 – 15 Apr
8 Jun
5-7 wk
20 May
13 Jul
0 wk
21 May
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
20 Jun
4-6 wk
20 May
18 Jul
0 wk
21 May
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
3 – 31 Mar
8-12 wk
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
3 Jun
5-7 wk
20 May
8 Jul
0 wk
20 May
28 Jun
0 wk
Garden cucumber
Cucumis sativus
Season too short
28 Apr – 5 May
16 May
3-4 wk
26 May
6 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
17 – 24 May
31 May
4-5 wk
21 Jun
28 Jun
5 wk after
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
25 Feb – 25 Mar
17 Mar
8-12 wk
20 May
0 wk
26 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
17 May
1 Jun
0 wk
17 May
22 May
0 wk
Maize
Zea mays
Greenhouse
22 – 29 Apr
6 May
3-4 wk
20 May
27 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
27 Jun
3-4 wk
22 May
18 Jul
0 wk
2 Jun
8 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
28 Jun
0 wk
20 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
3 Jun
5-7 wk
20 May
8 Jul
0 wk
20 May
28 Jun
0 wk
Potato
Solanum tuberosum
Fleece
9 – 23 Apr
13 May
4-6 wk
21 May
10 Jun
0 wk
21 May
31 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
13 Jun
5-7 wk
20 May
18 Jul
0 wk
21 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
5 – 12 May
21 May
3-4 wk
2 Jun
11 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
22 – 29 Apr
14 May
3-4 wk
20 May
4 Jun
0 wk
26 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
15 Jun
4-6 wk
20 May
13 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
2 Jul
3-4 wk
20 May
23 Jul
0 wk
21 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
15 Jun
4-6 wk
20 May
13 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
11 May
2-4 wk
20 May
25 May
0 wk
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
17 May
1 Jun
0 wk
17 May
22 May
0 wk
Spinach
Spinacia oleracea
22 – 29 Apr
17 Jul
3-4 wk
20 May
7 Aug
0 wk
17 May
28 Jul
0 wk
Sweet potato
Ipomoea batatas
14 – 28 Jun
4-6 wk
26 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
25 Mar – 8 Apr
15 Apr
6-8 wk
20 May
27 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
22 Apr – 6 May
26 Jun
2-4 wk
20 May
10 Jul
0 wk
2 Jun
30 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
15 Jun
4-6 wk
20 May
13 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
17 Jun
3-4 wk
20 May
8 Jul
0 wk
21 May
28 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
14 – 28 Apr
2 Jun
4-6 wk
26 May
30 Jun
1 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
13 May
8-10 wk
20 May
8 Jul
0 wk
14 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
21 May
18 Jul
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
27 May
6-8 wk
20 May
8 Jul
0 wk
21 May
28 Jun
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
13 May
8-12 wk
20 May
8 Jul
0 wk
14 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
20 May
7 Aug
0 wk
2 Jun
28 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
28 Apr
8-10 wk
22 May
23 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
3 May
8-10 wk
20 May
28 Jun
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
17 May
6-8 wk
20 May
28 Jun
0 wk
14 Jun
18 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
17 May
6-8 wk
20 May
28 Jun
0 wk
21 May
18 Jun
0 wk
Rosemary
Salvia rosmarinus
13 Feb – 13 Mar
30 Mar
10-14 wk
22 May
8 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
28 Apr – 5 May
9 Jun
3-4 wk
26 May
30 Jun
1 wk after
Cornflower
Centaurea cyanus
20 May
8 Jul
0 wk
21 May
28 Jun
0 wk
Statice
Limonium sinuatum
24 Mar – 7 Apr
18 Apr
8-10 wk
2 Jun
13 Jun
2 wk after
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
2 May
6-8 wk
2 Jun
13 Jun
2 wk after
26 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
5 – 19 Apr
9 May
6-8 wk
31 May
20 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
7 Apr – 5 May
31 May
4-8 wk
2 Jun
28 Jun
2 wk after
2 Jun
18 Jun
2 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
2 Jun
2 wk after
Busy lizzie
Impatiens walleriana
29 Mar – 26 Apr
17 May
8-12 wk
21 Jun
12 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
12 May
6-8 wk
2 Jun
23 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Mar
13 Apr
8-10 wk
22 May
8 Jun
0 wk
Love in a mist
Nigella damascena
20 May
23 Jun
0 wk
21 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
31 Mar – 14 Apr
4 May
6-8 wk
26 May
15 Jun
1 wk after
9 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
13 Apr
8-12 wk
22 May
8 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
25 Feb – 25 Mar
14 Mar
8-12 wk
20 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
3 – 31 Mar
25 Apr
8-12 wk
26 May
20 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
31 Mar – 14 Apr
9 May
6-8 wk
26 May
20 Jun
1 wk after
Corn poppy
Papaver rhoeas
20 May
8 Jul
0 wk
21 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
3 May
8-12 wk
20 May
28 Jun
0 wk
30 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
24 Mar – 7 Apr
10 May
8-10 wk
2 Jun
5 Jul
2 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
24 May
5-8 wk
20 May
28 Jun
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
27 May
6-8 wk
20 May
8 Jul
0 wk
2 Jun
28 Jun
2 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
27 Apr
6-8 wk
20 May
8 Jun
0 wk
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
14 – 28 Apr
18 May
4-6 wk
26 May
15 Jun
1 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
13 May
8-10 wk
20 May
8 Jul
0 wk
30 May
28 Jun
1 wk after
Petunia
Petunia
10 Mar – 7 Apr
18 Apr
8-12 wk
2 Jun
13 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
27 Apr
6-8 wk
22 May
8 Jun
0 wk
2 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
14 – 28 Apr
2 Jun
4-6 wk
26 May
30 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
21 Apr – 5 May
9 Jun
3-5 wk
26 May
30 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
23 May
4-6 wk
2 Jun
20 Jun
2 wk after
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
10 Mar – 7 Apr
25 May
8-12 wk
2 Jun
20 Jul
2 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
13 Apr
8-12 wk
20 May
8 Jun
0 wk
14 Jun
4 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
28 Mar
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
8 Jun
0 wk
21 May
29 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
17 May
6-8 wk
20 May
28 Jun
0 wk
4 May
18 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
31 May
4-6 wk
20 May
28 Jun
0 wk
2 Jun
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
3 – 17 Mar
30 Mar
10-12 wk
26 May
8 Jun
1 wk after
Sunflower
Helianthus annuus
5 – 12 May
7 Jun
3-4 wk
2 Jun
28 Jun
2 wk after
14 Jun
18 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
27 May
6-8 wk
2 Jun
8 Jul
2 wk after
2 Jul
6 wk after
Annual phlox
Phlox drummondii
31 Mar – 14 Apr
12 May
6-8 wk
26 May
23 Jun
1 wk after
2 Jul
6 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
13 Apr
8-12 wk
20 May
8 Jun
0 wk
14 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Apr
12 May
6-8 wk
2 Jun
23 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
17 May
6-8 wk
22 May
28 Jun
0 wk
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
3 Apr
8-10 wk
20 May
29 May
0 wk
14 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
17 Mar – 14 Apr
19 May
6-10 wk
26 May
30 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
20 May
8 Jul
0 wk
21 May
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
3 May
8-10 wk
2 Jun
28 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
27 Apr
6-8 wk
20 May
8 Jun
0 wk
2 Jun
2 wk after