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Method
Rel. frost
Last spring frost (0°C) 5 May Frost 9 of 10 years · 20 years of data
Frost-free season 109 days 5 May – 22 Aug
Probability that frost is over

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