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Method
Rel. frost
Last spring frost (0°C) 18 May Frost 9 of 10 years · 20 years of data
Frost-free season 100 days 18 May – 26 Aug
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)
30 Mar – 13 Apr
12 Jun
5-7 wk
18 May
17 Jul
0 wk
19 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
24 Jun
4-6 wk
18 May
22 Jul
0 wk
19 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
7 Jun
5-7 wk
18 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
26 Apr – 3 May
17 May
4-5 wk
31 May
14 Jun
2 wk after
12 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
15 Mar
8-12 wk
18 May
0 wk
31 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
30 May
0 wk
19 May
20 May
0 wk
Maize
Zea mays
Season too short
20 – 27 Apr
3-4 wk
18 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
13 Jun
3-4 wk
20 May
4 Jul
0 wk
31 May
24 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
24 Jun
0 wk
18 May
14 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
7 Jun
5-7 wk
18 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Potato
Solanum tuberosum
16 – 30 Apr
12 May
4-6 wk
28 May
9 Jun
1 wk after
28 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
9 Jun
5-7 wk
18 May
14 Jul
0 wk
19 May
4 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
18 May
3-4 wk
20 May
8 Jun
0 wk
31 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
19 Jun
4-6 wk
18 May
17 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
28 Jun
3-4 wk
18 May
19 Jul
0 wk
19 May
9 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
19 Jun
4-6 wk
18 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
18 May
2-4 wk
18 May
1 Jun
0 wk
18 May
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
30 May
0 wk
19 May
20 May
0 wk
Spinach
Spinacia oleracea
20 – 27 Apr
21 Jul
3-4 wk
18 May
11 Aug
0 wk
15 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
12 – 26 Jun
4-6 wk
24 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
20 Apr – 4 May
2-4 wk
18 May
0 wk
31 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
19 Jun
4-6 wk
18 May
17 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
13 Jun
3-4 wk
18 May
4 Jul
0 wk
19 May
24 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
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
9 May
8-10 wk
18 May
4 Jul
0 wk
12 Jun
24 Jun
4 wk after
Dill
Anethum graveolens
19 May
4 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
31 May
6-8 wk
18 May
12 Jul
0 wk
19 May
2 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
17 May
8-12 wk
18 May
12 Jul
0 wk
12 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
18 May
24 Jul
0 wk
31 May
14 Jul
2 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
2 May
8-10 wk
20 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
7 May
8-10 wk
18 May
2 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
21 May
6-8 wk
18 May
2 Jul
0 wk
12 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
21 May
6-8 wk
18 May
2 Jul
0 wk
19 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
13 Mar
10-14 wk
20 May
22 May
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
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Cornflower
Centaurea cyanus
18 May
12 Jul
0 wk
19 May
2 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
9 – 23 Mar
21 Mar
8-10 wk
18 May
0 wk
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
28 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
23 Mar – 6 Apr
4 Apr
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
23 Mar – 6 Apr
8 Apr
6-8 wk
18 May
20 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
5 Apr – 3 May
14 Apr
4-8 wk
31 May
2 wk after
31 May
2 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
31 May
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
8 Mar – 5 Apr
12 Apr
8-12 wk
31 May
7 Jun
2 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
23 Mar – 6 Apr
14 Apr
6-8 wk
18 May
26 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
4-6 wk
31 May
2 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Mar
30 Mar
8-10 wk
20 May
25 May
0 wk
Love in a mist
Nigella damascena
18 May
19 Jun
0 wk
19 May
9 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
23 Mar – 6 Apr
25 Mar
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
30 Mar
8-12 wk
20 May
25 May
0 wk
Cardoon
Cynara cardunculus
Greenhouse
23 Feb – 23 Mar
18 Mar
8-12 wk
18 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
29 Mar – 12 Apr
6-8 wk
24 May
1 wk after
Corn poppy
Papaver rhoeas
18 May
4 Jul
0 wk
19 May
24 Jun
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
29 Apr
8-12 wk
18 May
24 Jun
0 wk
28 May
14 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
15 – 29 Mar
31 Mar
8-10 wk
24 May
26 May
1 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
28 May
5-8 wk
18 May
2 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
23 May
6-8 wk
18 May
4 Jul
0 wk
31 May
24 Jun
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
1 May
6-8 wk
18 May
12 Jun
0 wk
31 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
17 May
8-10 wk
18 May
12 Jul
0 wk
28 May
2 Jul
1 wk after
Petunia
Petunia
Greenhouse
23 Feb – 23 Mar
21 Mar
8-12 wk
18 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
13 Apr
6-8 wk
20 May
25 May
0 wk
30 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
6 – 20 Apr
24 Apr
4-6 wk
18 May
22 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
19 Apr – 3 May
3-5 wk
24 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
6 – 20 Apr
22 Apr
4-6 wk
18 May
20 May
0 wk
31 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
8 Mar – 5 Apr
17 Mar
8-12 wk
31 May
2 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
9 Apr
8-12 wk
18 May
4 Jun
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
1 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
12 Jun
0 wk
19 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
21 May
6-8 wk
18 May
2 Jul
0 wk
2 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
27 May
4-6 wk
18 May
24 Jun
0 wk
31 May
14 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
1 – 15 Mar
10-12 wk
24 May
1 wk after
Sunflower
Helianthus annuus
3 – 10 May
21 May
3-4 wk
31 May
11 Jun
2 wk after
12 Jun
4 wk after
China aster
Callistephus chinensis
5 – 19 Apr
10 May
6-8 wk
31 May
21 Jun
2 wk after
30 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
23 Mar – 6 Apr
14 Apr
6-8 wk
18 May
26 May
0 wk
31 May
2 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
9 Apr
8-12 wk
18 May
4 Jun
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
23 Mar – 6 Apr
14 Apr
6-8 wk
18 May
26 May
0 wk
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
30 Apr
6-8 wk
20 May
11 Jun
0 wk
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
30 Mar
8-10 wk
18 May
25 May
0 wk
12 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
15 Mar – 12 Apr
6-10 wk
24 May
1 wk after
California goldenpoppy
Eschscholzia californica
18 May
1 Jul
0 wk
19 May
21 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
15 – 29 Mar
19 Apr
8-10 wk
24 May
14 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
1 May
6-8 wk
18 May
12 Jun
0 wk
31 May
2 Jun
2 wk after