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