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