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Method
Rel. frost
Last spring frost (0°C) 9 May Frost 9 of 10 years · 20 years of data
Frost-free season 115 days 9 May – 1 Sep
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)
21 Mar – 4 Apr
16 Jun
5-7 wk
9 May
21 Jul
0 wk
13 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
28 Mar – 11 Apr
28 Jun
4-6 wk
9 May
26 Jul
0 wk
13 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
24 Feb – 24 Mar
8-12 wk
19 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
21 Mar – 4 Apr
11 Jun
5-7 wk
9 May
16 Jul
0 wk
9 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
21 – 28 Apr
3-4 wk
19 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
24 Apr – 1 May
22 May
4-5 wk
29 May
19 Jun
3 wk after
13 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
22 – 29 May
3-4 wk
19 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
14 Feb – 14 Mar
12 Mar
8-12 wk
9 May
0 wk
30 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
13 May
27 May
1 wk after
13 May
17 May
1 wk after
Maize
Zea mays
Season too short
13 – 20 Apr
3-4 wk
11 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 Apr
18 Jun
3-4 wk
14 May
9 Jul
1 wk after
30 May
29 Jun
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
9 May
3 Jul
0 wk
9 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
21 Mar – 4 Apr
11 Jun
5-7 wk
9 May
16 Jul
0 wk
9 May
6 Jul
0 wk
Potato
Solanum tuberosum
13 – 27 Apr
13 May
4-6 wk
25 May
10 Jun
2 wk after
25 May
31 May
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
21 Mar – 4 Apr
18 Jun
5-7 wk
9 May
23 Jul
0 wk
13 May
13 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
21 – 28 Apr
3-4 wk
19 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 Apr
19 May
3-4 wk
14 May
9 Jun
1 wk after
30 May
30 May
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
28 Mar – 11 Apr
23 Jun
4-6 wk
9 May
21 Jul
0 wk
Lettuce
Lactuca sativa
11 – 18 Apr
7 Jul
3-4 wk
9 May
28 Jul
0 wk
13 May
18 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
28 Mar – 11 Apr
23 Jun
4-6 wk
9 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Apr
22 May
2-4 wk
9 May
5 Jun
0 wk
9 May
26 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
13 May
27 May
1 wk after
13 May
17 May
1 wk after
Spinach
Spinacia oleracea
11 – 18 Apr
25 Jul
3-4 wk
9 May
15 Aug
0 wk
5 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
10 – 24 Jun
4-6 wk
22 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
16 – 30 Mar
6-8 wk
11 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
13 – 27 Apr
2-4 wk
11 May
0 wk
30 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
28 Mar – 11 Apr
23 Jun
4-6 wk
9 May
21 Jul
0 wk
Garden pea
Pisum sativum
11 – 18 Apr
22 Jun
3-4 wk
9 May
13 Jul
0 wk
13 May
3 Jul
1 wk after

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
7 – 21 Apr
4-6 wk
19 May
1 wk after
Lemon balm
Melissa officinalis
28 Feb – 14 Mar
18 May
8-10 wk
9 May
13 Jul
0 wk
13 Jun
3 Jul
5 wk after
Dill
Anethum graveolens
13 May
9 Jul
1 wk after
Wild chives
Allium schoenoprasum
14 – 28 Mar
4 Jun
6-8 wk
9 May
16 Jul
0 wk
13 May
6 Jul
1 wk after
Spearmint
Mentha spicata
14 Feb – 14 Mar
21 May
8-12 wk
9 May
16 Jul
0 wk
13 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
9 May
29 Jul
0 wk
30 May
19 Jul
3 wk after
Garden sage
Salvia officinalis
5 – 19 Mar
6 May
8-10 wk
14 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
28 Feb – 14 Mar
11 May
8-10 wk
9 May
6 Jul
0 wk
Oregano
Origanum vulgare
14 – 28 Mar
25 May
6-8 wk
9 May
6 Jul
0 wk
13 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
14 – 28 Mar
25 May
6-8 wk
9 May
6 Jul
0 wk
13 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
5 Feb – 5 Mar
16 Mar
10-14 wk
14 May
25 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
21 – 28 Apr
3-4 wk
19 May
1 wk after
Cornflower
Centaurea cyanus
9 May
16 Jul
0 wk
13 May
6 Jul
1 wk after
Statice
Limonium sinuatum
Greenhouse
2 – 16 Mar
27 Mar
8-10 wk
11 May
22 May
0 wk
Sweet William
Dianthus barbatus
14 – 28 Mar
6-8 wk
9 May
0 wk
25 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
16 – 30 Mar
10 Apr
6-8 wk
11 May
22 May
0 wk
19 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
19 Mar – 2 Apr
30 Mar
6-8 wk
14 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
4 Apr – 2 May
13 Apr
4-8 wk
30 May
3 wk after
30 May
3 wk after
Foxglove
Digitalis purpurea
28 Feb – 14 Mar
8-10 wk
9 May
0 wk
30 May
3 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
24 Feb – 24 Mar
11 May
8-12 wk
19 May
6 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
16 – 30 Mar
20 Apr
6-8 wk
11 May
1 Jun
0 wk
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
3 wk after
Chinese lantern
Physalis alkekengi
5 – 19 Mar
4 Apr
8-10 wk
14 May
30 May
1 wk after
Love in a mist
Nigella damascena
9 May
28 Jun
0 wk
13 May
18 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Greenhouse
16 – 30 Mar
31 Mar
6-8 wk
11 May
12 May
0 wk
19 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
19 Feb – 19 Mar
4 Apr
8-12 wk
14 May
30 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
16 Feb – 16 Mar
22 Mar
8-12 wk
11 May
17 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
24 Feb – 24 Mar
8-12 wk
19 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
24 Mar – 7 Apr
6-8 wk
19 May
1 wk after
Corn poppy
Papaver rhoeas
9 May
13 Jul
0 wk
13 May
3 Jul
1 wk after
Snapdragon
Antirrhinum majus
14 Feb – 14 Mar
8 May
8-12 wk
9 May
3 Jul
0 wk
25 May
23 Jun
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
10 – 24 Mar
6 Apr
8-10 wk
19 May
1 Jun
1 wk after
Sweet pea
Lathyrus odoratus
14 Mar – 4 Apr
1 Jun
5-8 wk
9 May
6 Jul
0 wk
Stock
Matthiola incana
14 – 28 Mar
1 Jun
6-8 wk
9 May
13 Jul
0 wk
30 May
3 Jul
3 wk after
Wormwood
Artemisia absinthium
14 – 28 Mar
5 May
6-8 wk
9 May
16 Jun
0 wk
30 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
7 – 21 Apr
4-6 wk
19 May
1 wk after
Garden pansy
Viola × wittrockiana
28 Feb – 14 Mar
21 May
8-10 wk
9 May
16 Jul
0 wk
25 May
6 Jul
2 wk after
Petunia
Petunia
Greenhouse
16 Feb – 16 Mar
27 Mar
8-12 wk
11 May
22 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
19 Mar – 2 Apr
18 Apr
6-8 wk
14 May
30 May
1 wk after
27 Jun
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
30 Mar – 13 Apr
23 Apr
4-6 wk
11 May
21 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
14 – 28 Apr
3-5 wk
19 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
30 Mar – 13 Apr
28 Apr
4-6 wk
11 May
26 May
0 wk
30 May
3 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
3 wk after
Bee balm
Monarda didyma
14 Feb – 14 Mar
18 Apr
8-12 wk
9 May
13 Jun
0 wk
13 Jun
5 wk after
Yarrow
Achillea millefolium
14 – 28 Mar
5 Apr
6-8 wk
9 May
17 May
0 wk
30 May
3 wk after
Safflower
Carthamus tinctorius
9 May
16 Jun
0 wk
13 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
14 – 28 Mar
25 May
6-8 wk
9 May
6 Jul
0 wk
21 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
28 Mar – 11 Apr
5 Jun
4-6 wk
9 May
3 Jul
0 wk
30 May
23 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
24 Feb – 10 Mar
10-12 wk
19 May
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
24 May
3-4 wk
29 May
14 Jun
3 wk after
13 Jun
5 wk after
China aster
Callistephus chinensis
3 – 17 Apr
13 May
6-8 wk
29 May
24 Jun
3 wk after
27 Jun
7 wk after
Annual phlox
Phlox drummondii
Greenhouse
14 – 28 Mar
20 Apr
6-8 wk
9 May
1 Jun
0 wk
30 May
3 wk after
Hollyhock
Alcea rosea
14 – 28 Mar
6-8 wk
9 May
0 wk
30 May
3 wk after
Alpine delphinium
Delphinium elatum
14 Feb – 14 Mar
18 Apr
8-12 wk
9 May
13 Jun
0 wk
13 Jun
5 wk after
African marigold
Tagetes erecta
Greenhouse
16 – 30 Mar
20 Apr
6-8 wk
11 May
1 Jun
0 wk
Black-eyed Susan
Rudbeckia hirta
19 Mar – 2 Apr
3 May
6-8 wk
14 May
14 Jun
1 wk after
27 Jun
7 wk after
Wood sage
Salvia nemorosa
28 Feb – 14 Mar
8 Apr
8-10 wk
9 May
3 Jun
0 wk
13 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
10 Mar – 7 Apr
6-10 wk
19 May
1 wk after
California goldenpoppy
Eschscholzia californica
9 May
10 Jul
0 wk
13 May
30 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
10 – 24 Mar
24 Apr
8-10 wk
19 May
19 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
14 – 28 Mar
5 May
6-8 wk
9 May
16 Jun
0 wk
30 May
6 Jun
3 wk after