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