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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 136 days 4 May – 17 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
12 Jun
5-7 wk
4 May
17 Jul
0 wk
5 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
23 Mar – 6 Apr
24 Jun
4-6 wk
4 May
22 Jul
0 wk
5 May
12 Jul
0 wk
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
7 Jun
5-7 wk
4 May
12 Jul
0 wk
4 May
2 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
19 May
4-5 wk
9 Jun
16 Jun
5 wk after
16 Jun
6 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
19 Mar
8-12 wk
4 May
14 May
0 wk
17 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
5 May
3 Jun
0 wk
5 May
24 May
0 wk
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
28 Jun
3-4 wk
11 May
19 Jul
1 wk after
17 May
9 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 May
2 Jul
0 wk
4 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 – 30 Mar
7 Jun
5-7 wk
4 May
12 Jul
0 wk
4 May
2 Jul
0 wk
Potato
Solanum tuberosum
2 – 16 Apr
18 May
4-6 wk
14 May
15 Jun
1 wk after
14 May
5 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 – 30 Mar
17 Jun
5-7 wk
4 May
22 Jul
0 wk
5 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
19 – 26 Apr
10 May
3-4 wk
17 May
31 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
13 – 20 Apr
22 May
3-4 wk
11 May
12 Jun
1 wk after
17 May
2 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Mar – 6 Apr
19 Jun
4-6 wk
4 May
17 Jul
0 wk
Lettuce
Lactuca sativa
6 – 13 Apr
6 Jul
3-4 wk
4 May
27 Jul
0 wk
5 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Mar – 6 Apr
19 Jun
4-6 wk
4 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Apr
24 May
2-4 wk
4 May
7 Jun
0 wk
4 May
28 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
5 May
3 Jun
0 wk
5 May
24 May
0 wk
Spinach
Spinacia oleracea
6 – 13 Apr
21 Jul
3-4 wk
4 May
11 Aug
0 wk
1 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
29 May – 12 Jun
4-6 wk
10 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
9 – 23 Mar
12 Mar
6-8 wk
4 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
6 – 20 Apr
12 May
2-4 wk
4 May
26 May
0 wk
17 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Mar – 6 Apr
19 Jun
4-6 wk
4 May
17 Jul
0 wk
Garden pea
Pisum sativum
6 – 13 Apr
21 Jun
3-4 wk
4 May
12 Jul
0 wk
5 May
2 Jul
0 wk

Herbs

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