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Rel. frost
Last spring frost (0°C) 15 May Frost 3 of 4 years · 20 years of data
Frost-free season 136 days 15 May – 28 Sep
Probability that frost is over

25% = 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)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
20 Jun
4-6 wk
15 May
18 Jul
0 wk
16 May
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
3 Jun
5-7 wk
15 May
8 Jul
0 wk
15 May
28 Jun
0 wk
Garden cucumber
Cucumis sativus
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 May
31 May
4-5 wk
16 Jun
28 Jun
5 wk after
27 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
20 Feb – 20 Mar
10 Mar
8-12 wk
15 May
0 wk
21 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
12 May
25 May
0 wk
12 May
15 May
0 wk
Maize
Zea mays
Season too short
17 – 24 Apr
3-4 wk
15 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
27 Jun
3-4 wk
17 May
18 Jul
0 wk
28 May
8 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
28 Jun
0 wk
15 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
3 Jun
5-7 wk
15 May
8 Jul
0 wk
15 May
28 Jun
0 wk
Potato
Solanum tuberosum
Fleece
4 – 18 Apr
6 May
4-6 wk
16 May
3 Jun
0 wk
16 May
24 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
13 Jun
5-7 wk
15 May
18 Jul
0 wk
16 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
23 – 30 Apr
16 Jun
3-4 wk
21 May
7 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
17 – 24 Apr
30 Apr
3-4 wk
15 May
21 May
0 wk
21 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
15 Jun
4-6 wk
15 May
13 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
2 Jul
3-4 wk
15 May
23 Jul
0 wk
16 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
15 Jun
4-6 wk
15 May
13 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
9 May
2-4 wk
15 May
23 May
0 wk
15 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
12 May
25 May
0 wk
12 May
15 May
0 wk
Spinach
Spinacia oleracea
17 – 24 Apr
17 Jul
3-4 wk
15 May
7 Aug
0 wk
12 May
28 Jul
0 wk
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
17 Apr – 1 May
18 Jun
2-4 wk
15 May
2 Jul
0 wk
28 May
22 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
15 Jun
4-6 wk
15 May
13 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
17 Jun
3-4 wk
15 May
8 Jul
0 wk
16 May
28 Jun
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
9 – 23 Apr
25 May
4-6 wk
21 May
22 Jun
1 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
13 May
8-10 wk
15 May
8 Jul
0 wk
9 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
16 May
18 Jul
0 wk
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
27 May
6-8 wk
15 May
8 Jul
0 wk
16 May
28 Jun
0 wk
Spearmint
Mentha spicata
20 Feb – 20 Mar
13 May
8-12 wk
15 May
8 Jul
0 wk
9 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
15 May
7 Aug
0 wk
28 May
28 Jul
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
28 Apr
8-10 wk
17 May
23 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
3 May
8-10 wk
15 May
28 Jun
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
17 May
6-8 wk
15 May
28 Jun
0 wk
9 Jun
18 Jun
4 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
17 May
6-8 wk
15 May
28 Jun
0 wk
16 May
18 Jun
0 wk
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
30 Mar
10-14 wk
17 May
8 Jun
0 wk

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