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

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