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Method
Rel. frost
Last spring frost (0°C) 21 May Normal year · 20 years of data
Frost-free season 121 days 21 May – 19 Sep
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)
2 – 16 Apr
9 Jun
5-7 wk
21 May
14 Jul
0 wk
22 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
21 Jun
4-6 wk
21 May
19 Jul
0 wk
22 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
4 Jun
5-7 wk
21 May
9 Jul
0 wk
21 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
29 Apr – 6 May
4 Jun
3-4 wk
27 May
25 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
1 Jun
4-5 wk
3 Jun
29 Jun
2 wk after
15 Jun
19 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
26 Feb – 26 Mar
21 Mar
8-12 wk
21 May
0 wk
27 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
25 May
0 wk
22 May
0 wk
Maize
Zea mays
Greenhouse
23 – 30 Apr
25 May
3-4 wk
21 May
15 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
28 Jun
3-4 wk
23 May
19 Jul
0 wk
3 Jun
9 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
4 Jun
5-7 wk
21 May
9 Jul
0 wk
21 May
29 Jun
0 wk
Potato
Solanum tuberosum
Fleece
10 – 24 Apr
17 May
4-6 wk
22 May
14 Jun
0 wk
22 May
4 Jun
0 wk
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
6 – 13 May
9 Jun
3-4 wk
3 Jun
30 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
7 May
3-4 wk
23 May
28 May
0 wk
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
16 Jun
4-6 wk
21 May
14 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
16 Jun
4-6 wk
21 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
19 May
2-4 wk
21 May
2 Jun
0 wk
21 May
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
25 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
18 Jul
3-4 wk
21 May
8 Aug
0 wk
18 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
26 Mar – 9 Apr
4 May
6-8 wk
21 May
15 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
29 Apr – 13 May
11 Jun
2-4 wk
27 May
25 Jun
1 wk after
15 Jun
15 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
16 Jun
4-6 wk
21 May
14 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
Fleece
22 Apr – 6 May
18 May
4-6 wk
3 Jun
15 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
19 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
14 May
8-12 wk
21 May
9 Jul
0 wk
15 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
21 May
8 Aug
0 wk
3 Jun
29 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
29 Apr
8-10 wk
23 May
24 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
4 May
8-10 wk
21 May
29 Jun
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
18 May
6-8 wk
21 May
29 Jun
0 wk
15 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
18 May
6-8 wk
21 May
29 Jun
0 wk
22 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
30 Mar
10-14 wk
23 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
Fleece
6 – 13 May
25 May
3-4 wk
3 Jun
15 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Statice
Limonium sinuatum
25 Mar – 8 Apr
17 Apr
8-10 wk
3 Jun
12 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
8 – 22 Apr
1 May
6-8 wk
3 Jun
12 Jun
2 wk after
27 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
6 May
6-8 wk
1 Jun
17 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
8 Apr – 6 May
31 May
4-8 wk
3 Jun
28 Jun
2 wk after
3 Jun
18 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
30 Mar – 27 Apr
5 Jun
8-12 wk
22 Jun
31 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
14 Apr
8-10 wk
23 May
9 Jun
0 wk
Love in a mist
Nigella damascena
21 May
24 Jun
0 wk
22 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
5 May
6-8 wk
27 May
16 Jun
1 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
14 Apr
8-12 wk
23 May
9 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
4 Mar – 1 Apr
15 Mar
8-12 wk
27 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
4 Mar – 1 Apr
22 Apr
8-12 wk
27 May
17 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
1 – 15 Apr
6 May
6-8 wk
27 May
17 Jun
1 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
25 Mar – 8 Apr
11 May
8-10 wk
3 Jun
6 Jul
2 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
25 May
5-8 wk
21 May
29 Jun
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
28 Apr
6-8 wk
21 May
9 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
15 – 29 Apr
15 May
4-6 wk
27 May
12 Jun
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
14 May
8-10 wk
21 May
9 Jul
0 wk
31 May
29 Jun
1 wk after
Petunia
Petunia
11 Mar – 8 Apr
17 Apr
8-12 wk
3 Jun
12 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
28 Apr
6-8 wk
23 May
9 Jun
0 wk
3 Jul
6 wk after
Common zinnia
Zinnia elegans
22 Apr – 6 May
18 May
4-6 wk
3 Jun
15 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
29 Apr – 13 May
25 May
3-5 wk
3 Jun
15 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
22 Apr – 6 May
20 May
4-6 wk
3 Jun
17 Jun
2 wk after
3 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
10 May
8-12 wk
22 Jun
5 Jul
5 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
29 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
9 Jun
0 wk
22 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
18 May
6-8 wk
21 May
29 Jun
0 wk
5 May
19 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
4 – 18 Mar
30 Mar
10-12 wk
27 May
8 Jun
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
7 Jun
3-4 wk
3 Jun
28 Jun
2 wk after
15 Jun
18 Jun
4 wk after
China aster
Callistephus chinensis
8 – 22 Apr
27 May
6-8 wk
3 Jun
8 Jul
2 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
11 May
6-8 wk
27 May
22 Jun
1 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
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
17 May
6-8 wk
23 May
28 Jun
0 wk
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
Fleece
25 Mar – 22 Apr
4 May
6-10 wk
3 Jun
15 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
25 Mar – 8 Apr
27 Apr
8-10 wk
3 Jun
22 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
28 Apr
6-8 wk
21 May
9 Jun
0 wk
3 Jun
2 wk after