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