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Method
Rel. frost
Last spring frost (0°C) 12 May Frost 9 of 10 years · 20 years of data
Frost-free season 108 days 12 May – 28 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)
24 Mar – 7 Apr
9 Jun
5-7 wk
12 May
14 Jul
0 wk
13 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
31 Mar – 14 Apr
21 Jun
4-6 wk
12 May
19 Jul
0 wk
13 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
24 Mar – 7 Apr
4 Jun
5-7 wk
12 May
9 Jul
0 wk
12 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
27 Apr – 4 May
15 May
4-5 wk
1 Jun
12 Jun
3 wk after
6 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
25 May – 1 Jun
3-4 wk
22 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
17 Feb – 17 Mar
10 Mar
8-12 wk
12 May
0 wk
18 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
13 May
14 May
0 wk
13 May
0 wk
Maize
Zea mays
Season too short
16 – 23 Apr
3-4 wk
14 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
11 Jun
3-4 wk
17 May
2 Jul
1 wk after
25 May
22 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 May
28 Jun
0 wk
12 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
24 Mar – 7 Apr
4 Jun
5-7 wk
12 May
9 Jul
0 wk
12 May
29 Jun
0 wk
Potato
Solanum tuberosum
10 – 24 Apr
24 Apr
4-6 wk
22 May
22 May
1 wk after
22 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
24 Mar – 7 Apr
13 Jun
5-7 wk
12 May
18 Jul
0 wk
13 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
14 – 21 Apr
27 Apr
3-4 wk
12 May
18 May
0 wk
18 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
31 Mar – 14 Apr
16 Jun
4-6 wk
12 May
14 Jul
0 wk
Lettuce
Lactuca sativa
14 – 21 Apr
2 Jul
3-4 wk
12 May
23 Jul
0 wk
13 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
31 Mar – 14 Apr
16 Jun
4-6 wk
12 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
14 – 28 Apr
9 May
2-4 wk
12 May
23 May
0 wk
12 May
13 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
13 May
14 May
0 wk
13 May
0 wk
Spinach
Spinacia oleracea
14 – 21 Apr
18 Jul
3-4 wk
12 May
8 Aug
0 wk
9 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
6 – 20 Jun
4-6 wk
18 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
19 Mar – 2 Apr
6-8 wk
14 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
16 – 30 Apr
2-4 wk
14 May
0 wk
25 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
31 Mar – 14 Apr
16 Jun
4-6 wk
12 May
14 Jul
0 wk
Garden pea
Pisum sativum
14 – 21 Apr
17 Jun
3-4 wk
12 May
8 Jul
0 wk
13 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
10 – 24 Apr
4-6 wk
22 May
1 wk after
Lemon balm
Melissa officinalis
3 – 17 Mar
13 May
8-10 wk
12 May
8 Jul
0 wk
6 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
13 May
2 Jul
0 wk
Wild chives
Allium schoenoprasum
17 – 31 Mar
28 May
6-8 wk
12 May
9 Jul
0 wk
13 May
29 Jun
0 wk
Spearmint
Mentha spicata
17 Feb – 17 Mar
14 May
8-12 wk
12 May
9 Jul
0 wk
6 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
12 May
22 Jul
0 wk
25 May
12 Jul
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
29 Apr
8-10 wk
17 May
24 Jun
1 wk after
Common thyme
Thymus vulgaris
3 – 17 Mar
4 May
8-10 wk
12 May
29 Jun
0 wk
Oregano
Origanum vulgare
17 – 31 Mar
18 May
6-8 wk
12 May
29 Jun
0 wk
6 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
17 – 31 Mar
18 May
6-8 wk
12 May
29 Jun
0 wk
13 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
14 Mar
10-14 wk
17 May
23 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
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Cornflower
Centaurea cyanus
12 May
9 Jul
0 wk
13 May
29 Jun
0 wk
Statice
Limonium sinuatum
Greenhouse
5 – 19 Mar
23 Mar
8-10 wk
14 May
18 May
0 wk
Sweet William
Dianthus barbatus
17 – 31 Mar
6-8 wk
12 May
0 wk
22 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
19 Mar – 2 Apr
6 Apr
6-8 wk
14 May
18 May
0 wk
13 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
17 – 31 Mar
10 Apr
6-8 wk
12 May
22 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
23 Mar – 20 Apr
24 Apr
4-8 wk
18 May
22 May
1 wk after
18 May
1 wk after
Foxglove
Digitalis purpurea
3 – 17 Mar
8-10 wk
12 May
0 wk
25 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
27 Feb – 27 Mar
9 May
8-12 wk
22 May
4 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
19 Mar – 2 Apr
16 Apr
6-8 wk
14 May
28 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
20 Apr – 4 May
4-6 wk
1 Jun
3 wk after
Chinese lantern
Physalis alkekengi
8 – 22 Mar
28 Mar
8-10 wk
17 May
23 May
1 wk after
Love in a mist
Nigella damascena
12 May
23 Jun
0 wk
13 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
19 Mar – 2 Apr
27 Mar
6-8 wk
14 May
0 wk
13 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
22 Feb – 22 Mar
28 Mar
8-12 wk
17 May
23 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
19 Feb – 19 Mar
15 Mar
8-12 wk
14 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
Corn poppy
Papaver rhoeas
12 May
8 Jul
0 wk
13 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
17 Feb – 17 Mar
3 May
8-12 wk
12 May
28 Jun
0 wk
22 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
13 – 27 Mar
2 Apr
8-10 wk
22 May
28 May
1 wk after
Sweet pea
Lathyrus odoratus
17 Mar – 7 Apr
25 May
5-8 wk
12 May
29 Jun
0 wk
Stock
Matthiola incana
17 – 31 Mar
27 May
6-8 wk
12 May
8 Jul
0 wk
25 May
28 Jun
2 wk after
Wormwood
Artemisia absinthium
17 – 31 Mar
28 Apr
6-8 wk
12 May
9 Jun
0 wk
25 May
30 May
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
10 – 24 Apr
4-6 wk
22 May
1 wk after
Garden pansy
Viola × wittrockiana
3 – 17 Mar
14 May
8-10 wk
12 May
9 Jul
0 wk
22 May
29 Jun
1 wk after
Petunia
Petunia
Greenhouse
19 Feb – 19 Mar
23 Mar
8-12 wk
14 May
18 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
22 Mar – 5 Apr
11 Apr
6-8 wk
17 May
23 May
1 wk after
24 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
2 – 16 Apr
21 Apr
4-6 wk
14 May
19 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
17 Apr – 1 May
3-5 wk
22 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
2 – 16 Apr
24 Apr
4-6 wk
14 May
22 May
0 wk
25 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
9 Mar – 6 Apr
8-12 wk
1 Jun
3 wk after
Bee balm
Monarda didyma
17 Feb – 17 Mar
13 Apr
8-12 wk
12 May
8 Jun
0 wk
6 Jun
4 wk after
Yarrow
Achillea millefolium
17 – 31 Mar
29 Mar
6-8 wk
12 May
0 wk
25 May
2 wk after
Safflower
Carthamus tinctorius
12 May
9 Jun
0 wk
13 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
17 – 31 Mar
18 May
6-8 wk
12 May
29 Jun
0 wk
26 Apr
19 Jun
2 wk before
Bishop's flower
Ammi majus
31 Mar – 14 Apr
31 May
4-6 wk
12 May
28 Jun
0 wk
25 May
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
27 Feb – 13 Mar
10-12 wk
22 May
1 wk after
Sunflower
Helianthus annuus
4 – 11 May
22 May
3-4 wk
1 Jun
12 Jun
3 wk after
6 Jun
4 wk after
China aster
Callistephus chinensis
6 – 20 Apr
11 May
6-8 wk
1 Jun
22 Jun
3 wk after
24 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
17 – 31 Mar
16 Apr
6-8 wk
12 May
28 May
0 wk
25 May
2 wk after
Hollyhock
Alcea rosea
17 – 31 Mar
6-8 wk
12 May
0 wk
25 May
2 wk after
Alpine delphinium
Delphinium elatum
17 Feb – 17 Mar
13 Apr
8-12 wk
12 May
8 Jun
0 wk
6 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
19 Mar – 2 Apr
16 Apr
6-8 wk
14 May
28 May
0 wk
Black-eyed Susan
Rudbeckia hirta
22 Mar – 5 Apr
1 May
6-8 wk
17 May
12 Jun
1 wk after
24 Jun
6 wk after
Wood sage
Salvia nemorosa
3 – 17 Mar
3 Apr
8-10 wk
12 May
29 May
0 wk
6 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
13 Mar – 10 Apr
6-10 wk
22 May
1 wk after
California goldenpoppy
Eschscholzia californica
12 May
30 Jun
0 wk
13 May
20 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
13 – 27 Mar
17 Apr
8-10 wk
22 May
12 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
17 – 31 Mar
28 Apr
6-8 wk
12 May
9 Jun
0 wk
25 May
30 May
2 wk after