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