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Rel. frost
Last spring frost (0°C) 1 May Frost 9 of 10 years · 20 years of data
Frost-free season 137 days 1 May – 15 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)
13 – 27 Mar
13 Jun
5-7 wk
1 May
18 Jul
0 wk
2 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
20 Mar – 3 Apr
25 Jun
4-6 wk
1 May
23 Jul
0 wk
2 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
19 Feb – 19 Mar
8-12 wk
14 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
13 – 27 Mar
8 Jun
5-7 wk
1 May
13 Jul
0 wk
1 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
16 – 23 Apr
3-4 wk
14 May
2 wk after
Florence Fennel
Foeniculum vulgare
2 – 9 May
20 May
4-5 wk
6 Jun
17 Jun
5 wk after
13 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
19 – 26 May
3-4 wk
16 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Feb – 6 Mar
24 Mar
8-12 wk
1 May
19 May
0 wk
14 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 May
8 Jun
0 wk
2 May
29 May
0 wk
Maize
Zea mays
Season too short
3 – 10 Apr
3-4 wk
1 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
10 – 17 Apr
29 Jun
3-4 wk
8 May
20 Jul
1 wk after
14 May
10 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
1 May
3 Jul
0 wk
1 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
13 – 27 Mar
8 Jun
5-7 wk
1 May
13 Jul
0 wk
1 May
3 Jul
0 wk
Potato
Solanum tuberosum
30 Mar – 13 Apr
19 May
4-6 wk
11 May
16 Jun
1 wk after
11 May
6 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
13 – 27 Mar
18 Jun
5-7 wk
1 May
23 Jul
0 wk
2 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
16 – 23 Apr
21 May
3-4 wk
14 May
11 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
10 – 17 Apr
23 May
3-4 wk
8 May
13 Jun
1 wk after
14 May
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
20 Mar – 3 Apr
20 Jun
4-6 wk
1 May
18 Jul
0 wk
Lettuce
Lactuca sativa
3 – 10 Apr
7 Jul
3-4 wk
1 May
28 Jul
0 wk
2 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
20 Mar – 3 Apr
20 Jun
4-6 wk
1 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
3 – 17 Apr
29 May
2-4 wk
1 May
12 Jun
0 wk
1 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 May
8 Jun
0 wk
2 May
29 May
0 wk
Spinach
Spinacia oleracea
3 – 10 Apr
22 Jul
3-4 wk
1 May
12 Aug
0 wk
28 Apr
2 Aug
0 wk
Sweet potato
Ipomoea batatas
26 May – 9 Jun
4-6 wk
7 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
6 – 20 Mar
9 Mar
6-8 wk
1 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
3 – 17 Apr
23 May
2-4 wk
1 May
6 Jun
0 wk
14 May
27 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
20 Mar – 3 Apr
20 Jun
4-6 wk
1 May
18 Jul
0 wk
Garden pea
Pisum sativum
3 – 10 Apr
22 Jun
3-4 wk
1 May
13 Jul
0 wk
2 May
3 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
2 – 16 Apr
29 Apr
4-6 wk
14 May
27 May
2 wk after
Lemon balm
Melissa officinalis
20 Feb – 6 Mar
18 May
8-10 wk
1 May
13 Jul
0 wk
26 May
3 Jul
4 wk after
Dill
Anethum graveolens
2 May
20 Jul
0 wk
Wild chives
Allium schoenoprasum
6 – 20 Mar
1 Jun
6-8 wk
1 May
13 Jul
0 wk
2 May
3 Jul
0 wk
Spearmint
Mentha spicata
6 Feb – 6 Mar
18 May
8-12 wk
1 May
13 Jul
0 wk
26 May
3 Jul
4 wk after
Coriander
Coriandrum sativum
1 May
9 Aug
0 wk
14 May
30 Jul
2 wk after
Garden sage
Salvia officinalis
27 Feb – 13 Mar
3 May
8-10 wk
8 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
20 Feb – 6 Mar
8 May
8-10 wk
1 May
3 Jul
0 wk
Oregano
Origanum vulgare
6 – 20 Mar
22 May
6-8 wk
1 May
3 Jul
0 wk
26 May
23 Jun
4 wk after
Parsley
Petroselinum crispum
6 – 20 Mar
22 May
6-8 wk
1 May
3 Jul
0 wk
2 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
30 Jan – 27 Feb
26 Mar
10-14 wk
8 May
4 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
16 – 23 Apr
6 May
3-4 wk
14 May
27 May
2 wk after
Cornflower
Centaurea cyanus
1 May
13 Jul
0 wk
2 May
3 Jul
0 wk
Statice
Limonium sinuatum
Fleece
5 – 19 Mar
27 Mar
8-10 wk
14 May
22 May
2 wk after
Sweet William
Dianthus barbatus
6 – 20 Mar
6-8 wk
1 May
0 wk
11 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
19 Mar – 2 Apr
10 Apr
6-8 wk
14 May
22 May
2 wk after
20 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
13 – 27 Mar
16 Apr
6-8 wk
8 May
28 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
31 Mar – 28 Apr
19 Apr
4-8 wk
26 May
4 wk after
26 May
4 wk after
Foxglove
Digitalis purpurea
20 Feb – 6 Mar
8-10 wk
1 May
0 wk
14 May
2 wk after
Busy lizzie
Impatiens walleriana
14 Mar – 11 Apr
10 Apr
8-12 wk
6 Jun
5 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
19 Mar – 2 Apr
20 Apr
6-8 wk
14 May
1 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
11 – 25 Apr
4-6 wk
23 May
3 wk after
Chinese lantern
Physalis alkekengi
27 Feb – 13 Mar
15 Apr
8-10 wk
8 May
10 Jun
1 wk after
Love in a mist
Nigella damascena
1 May
28 Jun
0 wk
2 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Greenhouse
6 – 20 Mar
7 Apr
6-8 wk
1 May
19 May
0 wk
2 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
13 Feb – 13 Mar
15 Apr
8-12 wk
8 May
10 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
19 Feb – 19 Mar
19 Mar
8-12 wk
14 May
14 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
19 Feb – 19 Mar
22 Mar
8-12 wk
14 May
17 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
19 Mar – 2 Apr
5 Apr
6-8 wk
14 May
17 May
2 wk after
Corn poppy
Papaver rhoeas
1 May
13 Jul
0 wk
2 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
6 Feb – 6 Mar
8 May
8-12 wk
1 May
3 Jul
0 wk
11 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
14 – 28 Mar
6 Apr
8-10 wk
23 May
1 Jun
3 wk after
Sweet pea
Lathyrus odoratus
6 – 27 Mar
29 May
5-8 wk
1 May
3 Jul
0 wk
Stock
Matthiola incana
6 – 20 Mar
1 Jun
6-8 wk
1 May
13 Jul
0 wk
14 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
6 – 20 Mar
2 May
6-8 wk
1 May
13 Jun
0 wk
14 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
2 – 16 Apr
14 Apr
4-6 wk
14 May
2 wk after
Garden pansy
Viola × wittrockiana
20 Feb – 6 Mar
18 May
8-10 wk
1 May
13 Jul
0 wk
11 May
3 Jul
1 wk after
Petunia
Petunia
Fleece
19 Feb – 19 Mar
27 Mar
8-12 wk
14 May
22 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
13 – 27 Mar
29 Apr
6-8 wk
8 May
10 Jun
1 wk after
13 Jun
6 wk after
Common zinnia
Zinnia elegans
Fleece
2 – 16 Apr
29 Apr
4-6 wk
14 May
27 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
9 – 23 Apr
6 May
3-5 wk
14 May
27 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
2 – 16 Apr
30 Apr
4-6 wk
14 May
28 May
2 wk after
26 May
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
28 Feb – 28 Mar
21 Apr
8-12 wk
23 May
16 Jun
3 wk after
Bee balm
Monarda didyma
6 Feb – 6 Mar
18 Apr
8-12 wk
1 May
13 Jun
0 wk
26 May
3 Jun
4 wk after
Yarrow
Achillea millefolium
6 – 20 Mar
2 Apr
6-8 wk
1 May
14 May
0 wk
14 May
2 wk after
Safflower
Carthamus tinctorius
1 May
13 Jun
0 wk
2 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
6 – 20 Mar
22 May
6-8 wk
1 May
3 Jul
0 wk
15 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
20 Mar – 3 Apr
5 Jun
4-6 wk
1 May
3 Jul
0 wk
14 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
19 Feb – 5 Mar
27 Feb
10-12 wk
14 May
2 wk after
Sunflower
Helianthus annuus
25 Apr – 2 May
3 Jun
3-4 wk
23 May
24 Jun
3 wk after
26 May
14 Jun
4 wk after
China aster
Callistephus chinensis
28 Mar – 11 Apr
23 May
6-8 wk
23 May
4 Jul
3 wk after
13 Jun
24 Jun
6 wk after
Annual phlox
Phlox drummondii
Fleece
6 – 20 Mar
20 Apr
6-8 wk
1 May
1 Jun
0 wk
26 May
4 wk after
Hollyhock
Alcea rosea
6 – 20 Mar
6-8 wk
1 May
0 wk
14 May
2 wk after
Alpine delphinium
Delphinium elatum
6 Feb – 6 Mar
18 Apr
8-12 wk
1 May
13 Jun
0 wk
26 May
3 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
19 Mar – 2 Apr
20 Apr
6-8 wk
14 May
1 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
13 – 27 Mar
13 May
6-8 wk
8 May
24 Jun
1 wk after
13 Jun
14 Jun
6 wk after
Wood sage
Salvia nemorosa
20 Feb – 6 Mar
8 Apr
8-10 wk
1 May
3 Jun
0 wk
26 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
5 Mar – 2 Apr
15 Apr
6-10 wk
14 May
27 May
2 wk after
California goldenpoppy
Eschscholzia californica
1 May
13 Jul
0 wk
2 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
14 – 28 Mar
22 Apr
8-10 wk
23 May
17 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
6 – 20 Mar
2 May
6-8 wk
1 May
13 Jun
0 wk
14 May
3 Jun
2 wk after