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Method
Rel. frost
Last spring frost (0°C) 6 May Frost 9 of 10 years · 20 years of data
Frost-free season 135 days 6 May – 18 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)
18 Mar – 1 Apr
16 Jun
5-7 wk
6 May
21 Jul
0 wk
10 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
25 Mar – 8 Apr
28 Jun
4-6 wk
6 May
26 Jul
0 wk
10 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
18 Mar – 1 Apr
11 Jun
5-7 wk
6 May
16 Jul
0 wk
6 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
23 – 30 Apr
3-4 wk
21 May
2 wk after
Florence Fennel
Foeniculum vulgare
14 – 21 May
17 May
4-5 wk
18 Jun
6 wk after
24 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
11 Feb – 11 Mar
20 Mar
8-12 wk
6 May
15 May
0 wk
27 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
10 May
4 Jun
1 wk after
10 May
25 May
1 wk after
Maize
Zea mays
Season too short
9 – 16 Apr
3-4 wk
7 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 Apr
28 Jun
3-4 wk
14 May
19 Jul
1 wk after
27 May
9 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
6 May
6 Jul
0 wk
6 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
18 Mar – 1 Apr
11 Jun
5-7 wk
6 May
16 Jul
0 wk
6 May
6 Jul
0 wk
Potato
Solanum tuberosum
10 – 24 Apr
16 May
4-6 wk
22 May
13 Jun
2 wk after
22 May
3 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
18 Mar – 1 Apr
21 Jun
5-7 wk
6 May
26 Jul
0 wk
10 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
23 – 30 Apr
3-4 wk
21 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 Apr
22 May
3-4 wk
14 May
12 Jun
1 wk after
27 May
2 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
25 Mar – 8 Apr
23 Jun
4-6 wk
6 May
21 Jul
0 wk
Lettuce
Lactuca sativa
8 – 15 Apr
10 Jul
3-4 wk
6 May
31 Jul
0 wk
10 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
25 Mar – 8 Apr
23 Jun
4-6 wk
6 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
8 – 22 Apr
24 May
2-4 wk
6 May
7 Jun
0 wk
6 May
28 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
10 May
4 Jun
1 wk after
10 May
25 May
1 wk after
Spinach
Spinacia oleracea
8 – 15 Apr
25 Jul
3-4 wk
6 May
15 Aug
0 wk
2 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
7 – 21 Jun
4-6 wk
19 Jul
11 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
2-4 wk
7 May
0 wk
27 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
25 Mar – 8 Apr
23 Jun
4-6 wk
6 May
21 Jul
0 wk
Garden pea
Pisum sativum
8 – 15 Apr
25 Jun
3-4 wk
6 May
16 Jul
0 wk
10 May
6 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
9 – 23 Apr
4-6 wk
21 May
2 wk after
Lemon balm
Melissa officinalis
25 Feb – 11 Mar
21 May
8-10 wk
6 May
16 Jul
0 wk
10 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
10 May
19 Jul
1 wk after
Wild chives
Allium schoenoprasum
11 – 25 Mar
4 Jun
6-8 wk
6 May
16 Jul
0 wk
10 May
6 Jul
1 wk after
Spearmint
Mentha spicata
11 Feb – 11 Mar
21 May
8-12 wk
6 May
16 Jul
0 wk
10 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
6 May
8 Aug
0 wk
27 May
29 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
25 Feb – 11 Mar
11 May
8-10 wk
6 May
6 Jul
0 wk
Oregano
Origanum vulgare
11 – 25 Mar
25 May
6-8 wk
6 May
6 Jul
0 wk
10 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
11 – 25 Mar
25 May
6-8 wk
6 May
6 Jul
0 wk
10 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
5 Feb – 5 Mar
23 Mar
10-14 wk
14 May
1 Jun
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
23 – 30 Apr
3-4 wk
21 May
2 wk after
Cornflower
Centaurea cyanus
6 May
16 Jul
0 wk
10 May
6 Jul
1 wk after
Statice
Limonium sinuatum
Greenhouse
26 Feb – 12 Mar
28 Mar
8-10 wk
7 May
23 May
0 wk
Sweet William
Dianthus barbatus
11 – 25 Mar
6-8 wk
6 May
0 wk
22 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
12 – 26 Mar
11 Apr
6-8 wk
7 May
23 May
0 wk
16 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
19 Mar – 2 Apr
8 Apr
6-8 wk
14 May
20 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
1 – 29 Apr
22 Apr
4-8 wk
27 May
3 wk after
27 May
3 wk after
Foxglove
Digitalis purpurea
25 Feb – 11 Mar
8-10 wk
6 May
0 wk
27 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
10 Mar – 7 Apr
1 Apr
8-12 wk
2 Jun
4 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
26 Mar – 9 Apr
30 Mar
6-8 wk
21 May
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
4 wk after
Chinese lantern
Physalis alkekengi
5 – 19 Mar
14 Apr
8-10 wk
14 May
9 Jun
1 wk after
Love in a mist
Nigella damascena
6 May
1 Jul
0 wk
10 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Greenhouse
12 – 26 Mar
1 Apr
6-8 wk
7 May
13 May
0 wk
16 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
19 Feb – 19 Mar
14 Apr
8-12 wk
14 May
9 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
26 Feb – 26 Mar
22 Mar
8-12 wk
21 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
2 wk after
Corn poppy
Papaver rhoeas
6 May
16 Jul
0 wk
10 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
11 Feb – 11 Mar
11 May
8-12 wk
6 May
6 Jul
0 wk
22 May
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
12 – 26 Mar
7 Apr
8-10 wk
21 May
2 Jun
2 wk after
Sweet pea
Lathyrus odoratus
11 Mar – 1 Apr
1 Jun
5-8 wk
6 May
6 Jul
0 wk
Stock
Matthiola incana
11 – 25 Mar
4 Jun
6-8 wk
6 May
16 Jul
0 wk
27 May
6 Jul
3 wk after
Wormwood
Artemisia absinthium
11 – 25 Mar
5 May
6-8 wk
6 May
16 Jun
0 wk
27 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
9 – 23 Apr
4-6 wk
21 May
2 wk after
Garden pansy
Viola × wittrockiana
25 Feb – 11 Mar
21 May
8-10 wk
6 May
16 Jul
0 wk
22 May
6 Jul
2 wk after
Petunia
Petunia
Greenhouse
12 Feb – 12 Mar
28 Mar
8-12 wk
7 May
23 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
19 Mar – 2 Apr
28 Apr
6-8 wk
14 May
9 Jun
1 wk after
24 Jun
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
26 Mar – 9 Apr
2 May
4-6 wk
7 May
30 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
16 – 30 Apr
3-5 wk
21 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
9 – 23 Apr
22 Apr
4-6 wk
21 May
2 wk after
10 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
10 Mar – 7 Apr
8-12 wk
2 Jun
4 wk after
Bee balm
Monarda didyma
11 Feb – 11 Mar
21 Apr
8-12 wk
6 May
16 Jun
0 wk
10 Jun
5 wk after
Yarrow
Achillea millefolium
11 – 25 Mar
5 Apr
6-8 wk
6 May
17 May
0 wk
27 May
3 wk after
Safflower
Carthamus tinctorius
6 May
16 Jun
0 wk
10 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
11 – 25 Mar
25 May
6-8 wk
6 May
6 Jul
0 wk
18 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
25 Mar – 8 Apr
8 Jun
4-6 wk
6 May
6 Jul
0 wk
27 May
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
26 Feb – 12 Mar
10-12 wk
21 May
2 wk after
Sunflower
Helianthus annuus
5 – 12 May
31 May
3-4 wk
2 Jun
21 Jun
4 wk after
10 Jun
11 Jun
5 wk after
China aster
Callistephus chinensis
7 – 21 Apr
20 May
6-8 wk
2 Jun
1 Jul
4 wk after
24 Jun
7 wk after
Annual phlox
Phlox drummondii
Fleece
12 – 26 Mar
30 Mar
6-8 wk
7 May
11 May
0 wk
10 Jun
5 wk after
Hollyhock
Alcea rosea
11 – 25 Mar
6-8 wk
6 May
0 wk
27 May
3 wk after
Alpine delphinium
Delphinium elatum
11 Feb – 11 Mar
21 Apr
8-12 wk
6 May
16 Jun
0 wk
10 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
26 Mar – 9 Apr
30 Mar
6-8 wk
21 May
2 wk after
Black-eyed Susan
Rudbeckia hirta
19 Mar – 2 Apr
10 May
6-8 wk
14 May
21 Jun
1 wk after
24 Jun
7 wk after
Wood sage
Salvia nemorosa
25 Feb – 11 Mar
11 Apr
8-10 wk
6 May
6 Jun
0 wk
10 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
12 Mar – 9 Apr
6-10 wk
21 May
2 wk after
California goldenpoppy
Eschscholzia californica
6 May
14 Jul
0 wk
10 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
19 Apr
8-10 wk
2 Jun
14 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
11 – 25 Mar
5 May
6-8 wk
6 May
16 Jun
0 wk
27 May
6 Jun
3 wk after