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Rel. frost
Last spring frost (0°C) 4 May Frost 9 of 10 years · 20 years of data
Frost-free season 139 days 4 May – 20 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)
16 – 30 Mar
15 Jun
5-7 wk
4 May
20 Jul
0 wk
8 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
23 Mar – 6 Apr
27 Jun
4-6 wk
4 May
25 Jul
0 wk
8 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
22 Feb – 22 Mar
8-12 wk
17 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 – 30 Mar
10 Jun
5-7 wk
4 May
15 Jul
0 wk
4 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
19 – 26 Apr
3-4 wk
17 May
2 wk after
Florence Fennel
Foeniculum vulgare
5 – 12 May
22 May
4-5 wk
9 Jun
19 Jun
5 wk after
22 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
22 – 29 May
3-4 wk
19 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
9 Feb – 9 Mar
28 Mar
8-12 wk
4 May
23 May
0 wk
25 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
12 Jun
1 wk after
8 May
2 Jun
1 wk after
Maize
Zea mays
Season too short
6 – 13 Apr
3-4 wk
4 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
13 – 20 Apr
2 Jul
3-4 wk
11 May
23 Jul
1 wk after
25 May
13 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 May
5 Jul
0 wk
4 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 – 30 Mar
10 Jun
5-7 wk
4 May
15 Jul
0 wk
4 May
5 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
25 May
4-6 wk
20 May
22 Jun
2 wk after
20 May
12 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 – 30 Mar
20 Jun
5-7 wk
4 May
25 Jul
0 wk
8 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
19 – 26 Apr
27 Apr
3-4 wk
17 May
18 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
13 – 20 Apr
4 Jun
3-4 wk
11 May
25 Jun
1 wk after
25 May
15 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Lettuce
Lactuca sativa
6 – 13 Apr
9 Jul
3-4 wk
4 May
30 Jul
0 wk
8 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Apr
1 Jun
2-4 wk
4 May
15 Jun
0 wk
4 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
12 Jun
1 wk after
8 May
2 Jun
1 wk after
Spinach
Spinacia oleracea
6 – 13 Apr
24 Jul
3-4 wk
4 May
14 Aug
0 wk
30 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
5 – 19 Jun
4-6 wk
17 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
9 – 23 Mar
6-8 wk
4 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
6 – 20 Apr
29 Apr
2-4 wk
4 May
13 May
0 wk
25 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Garden pea
Pisum sativum
6 – 13 Apr
24 Jun
3-4 wk
4 May
15 Jul
0 wk
8 May
5 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
5 – 19 Apr
5 Apr
4-6 wk
17 May
2 wk after
Lemon balm
Melissa officinalis
23 Feb – 9 Mar
20 May
8-10 wk
4 May
15 Jul
0 wk
8 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
8 May
23 Jul
1 wk after
Wild chives
Allium schoenoprasum
9 – 23 Mar
3 Jun
6-8 wk
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Spearmint
Mentha spicata
9 Feb – 9 Mar
20 May
8-12 wk
4 May
15 Jul
0 wk
8 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
4 May
12 Aug
0 wk
25 May
2 Aug
3 wk after
Garden sage
Salvia officinalis
2 – 16 Mar
5 May
8-10 wk
11 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
23 Feb – 9 Mar
10 May
8-10 wk
4 May
5 Jul
0 wk
Oregano
Origanum vulgare
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
8 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
8 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
2 Feb – 2 Mar
21 Mar
10-14 wk
11 May
30 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
19 – 26 Apr
3-4 wk
17 May
2 wk after
Cornflower
Centaurea cyanus
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
8 – 22 Mar
30 Mar
8-10 wk
17 May
25 May
2 wk after
Sweet William
Dianthus barbatus
9 – 23 Mar
6-8 wk
4 May
0 wk
20 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
22 Mar – 5 Apr
13 Apr
6-8 wk
17 May
25 May
2 wk after
2 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
16 – 30 Mar
14 Apr
6-8 wk
11 May
26 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
30 Mar – 27 Apr
28 Apr
4-8 wk
25 May
26 May
3 wk after
25 May
3 wk after
Foxglove
Digitalis purpurea
23 Feb – 9 Mar
8-10 wk
4 May
0 wk
25 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
3 – 31 Mar
23 Apr
8-12 wk
26 May
18 Jun
3 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
22 Mar – 5 Apr
23 Apr
6-8 wk
17 May
4 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
14 – 28 Apr
4-6 wk
26 May
3 wk after
Chinese lantern
Physalis alkekengi
2 – 16 Mar
18 Apr
8-10 wk
11 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
4 May
30 Jun
0 wk
8 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
22 Mar – 5 Apr
3 Apr
6-8 wk
17 May
2 wk after
2 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
16 Feb – 16 Mar
18 Apr
8-12 wk
11 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
22 Feb – 22 Mar
21 Mar
8-12 wk
17 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
22 Feb – 22 Mar
26 Feb
8-12 wk
17 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
22 Mar – 5 Apr
6-8 wk
17 May
2 wk after
Corn poppy
Papaver rhoeas
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
9 Feb – 9 Mar
10 May
8-12 wk
4 May
5 Jul
0 wk
20 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
17 – 31 Mar
9 Apr
8-10 wk
26 May
4 Jun
3 wk after
Sweet pea
Lathyrus odoratus
9 – 30 Mar
31 May
5-8 wk
4 May
5 Jul
0 wk
Stock
Matthiola incana
9 – 23 Mar
3 Jun
6-8 wk
4 May
15 Jul
0 wk
25 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
9 – 23 Mar
4 May
6-8 wk
4 May
15 Jun
0 wk
25 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
5 – 19 Apr
4-6 wk
17 May
2 wk after
Garden pansy
Viola × wittrockiana
23 Feb – 9 Mar
20 May
8-10 wk
4 May
15 Jul
0 wk
20 May
5 Jul
2 wk after
Petunia
Petunia
Fleece
22 Feb – 22 Mar
30 Mar
8-12 wk
17 May
25 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
16 – 30 Mar
2 May
6-8 wk
11 May
13 Jun
1 wk after
22 Jun
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
23 Mar – 6 Apr
8 May
4-6 wk
4 May
5 Jun
0 wk
Common morning glory
Ipomoea purpurea
Season too short
12 – 26 Apr
12 Apr
3-5 wk
17 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
5 – 19 Apr
28 Apr
4-6 wk
17 May
26 May
2 wk after
8 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
3 – 31 Mar
28 Mar
8-12 wk
26 May
3 wk after
Bee balm
Monarda didyma
9 Feb – 9 Mar
20 Apr
8-12 wk
4 May
15 Jun
0 wk
8 Jun
5 wk after
Yarrow
Achillea millefolium
9 – 23 Mar
4 Apr
6-8 wk
4 May
16 May
0 wk
25 May
3 wk after
Safflower
Carthamus tinctorius
4 May
15 Jun
0 wk
8 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
16 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
7 Jun
4-6 wk
4 May
5 Jul
0 wk
25 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
22 Feb – 8 Mar
25 Feb
10-12 wk
17 May
2 wk after
Sunflower
Helianthus annuus
28 Apr – 5 May
29 May
3-4 wk
26 May
19 Jun
3 wk after
8 Jun
9 Jun
5 wk after
China aster
Callistephus chinensis
31 Mar – 14 Apr
18 May
6-8 wk
26 May
29 Jun
3 wk after
22 Jun
7 wk after
Annual phlox
Phlox drummondii
Fleece
9 – 23 Mar
23 Apr
6-8 wk
4 May
4 Jun
0 wk
8 Jun
5 wk after
Hollyhock
Alcea rosea
9 – 23 Mar
6-8 wk
4 May
0 wk
25 May
3 wk after
Alpine delphinium
Delphinium elatum
9 Feb – 9 Mar
20 Apr
8-12 wk
4 May
15 Jun
0 wk
8 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
22 Mar – 5 Apr
23 Apr
6-8 wk
17 May
4 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
16 – 30 Mar
8 May
6-8 wk
11 May
19 Jun
1 wk after
22 Jun
7 wk after
Wood sage
Salvia nemorosa
23 Feb – 9 Mar
10 Apr
8-10 wk
4 May
5 Jun
0 wk
8 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
8 Mar – 5 Apr
22 Mar
6-10 wk
17 May
2 wk after
California goldenpoppy
Eschscholzia californica
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
17 – 31 Mar
24 Apr
8-10 wk
26 May
19 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Mar
4 May
6-8 wk
4 May
15 Jun
0 wk
25 May
5 Jun
3 wk after