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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 111 days 18 May – 6 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)
30 Mar – 13 Apr
10 Jun
5-7 wk
18 May
15 Jul
0 wk
19 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
22 Jun
4-6 wk
18 May
20 Jul
0 wk
19 May
10 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
5 Jun
5-7 wk
18 May
10 Jul
0 wk
18 May
30 Jun
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
24 May
4-5 wk
31 May
21 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)
Season too short
23 Feb – 23 Mar
28 Feb
8-12 wk
18 May
0 wk
18 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
9 May
15 May
1 wk before
9 May
1 wk before
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
20 Jun
3-4 wk
20 May
11 Jul
0 wk
31 May
1 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
30 Jun
0 wk
18 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
5 Jun
5-7 wk
18 May
10 Jul
0 wk
18 May
30 Jun
0 wk
Potato
Solanum tuberosum
Season too short
3 – 17 Apr
25 Apr
4-6 wk
15 May
23 May
0 wk
15 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
15 Jun
5-7 wk
18 May
20 Jul
0 wk
19 May
10 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)
Fleece
20 – 27 Apr
24 Apr
3-4 wk
18 May
0 wk
24 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
17 Jun
4-6 wk
18 May
15 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
4 Jul
3-4 wk
18 May
25 Jul
0 wk
19 May
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
17 Jun
4-6 wk
18 May
15 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Greenhouse
4 – 18 Apr
15 May
2-4 wk
2 May
29 May
2 wk before
2 May
19 May
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
9 May
15 May
1 wk before
9 May
1 wk before
Spinach
Spinacia oleracea
20 – 27 Apr
19 Jul
3-4 wk
18 May
9 Aug
0 wk
15 May
30 Jul
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
17 Jun
4-6 wk
18 May
15 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
19 Jun
3-4 wk
18 May
10 Jul
0 wk
19 May
30 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
15 May
8-10 wk
18 May
10 Jul
0 wk
12 Jun
30 Jun
4 wk after
Dill
Anethum graveolens
19 May
11 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
29 May
6-8 wk
18 May
10 Jul
0 wk
19 May
30 Jun
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
15 May
8-12 wk
18 May
10 Jul
0 wk
12 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
18 May
31 Jul
0 wk
31 May
21 Jul
2 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
30 Apr
8-10 wk
20 May
25 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
5 May
8-10 wk
18 May
30 Jun
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
19 May
6-8 wk
18 May
30 Jun
0 wk
12 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
19 May
6-8 wk
18 May
30 Jun
0 wk
19 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
9 Feb – 9 Mar
30 Mar
10-14 wk
18 May
8 Jun
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
10 Jul
0 wk
19 May
30 Jun
0 wk
Statice
Limonium sinuatum
Greenhouse
9 – 23 Mar
28 Mar
8-10 wk
18 May
23 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
11 Apr
6-8 wk
18 May
23 May
0 wk
19 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
23 Mar – 6 Apr
19 Apr
6-8 wk
18 May
31 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
29 Mar – 26 Apr
3 May
4-8 wk
24 May
31 May
1 wk after
24 May
1 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
31 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
1 – 29 Mar
20 May
8-12 wk
24 May
15 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
23 Mar – 6 Apr
21 Apr
6-8 wk
18 May
2 Jun
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
6 Apr
8-10 wk
20 May
1 Jun
0 wk
Love in a mist
Nigella damascena
18 May
25 Jun
0 wk
19 May
15 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
23 Mar – 6 Apr
1 Apr
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
6 Apr
8-12 wk
20 May
1 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
23 Feb – 23 Mar
16 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
10 Jul
0 wk
19 May
30 Jun
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
5 May
8-12 wk
18 May
30 Jun
0 wk
28 May
20 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
15 – 29 Mar
7 Apr
8-10 wk
24 May
2 Jun
1 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
26 May
5-8 wk
18 May
30 Jun
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
29 May
6-8 wk
18 May
10 Jul
0 wk
31 May
30 Jun
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
29 Apr
6-8 wk
18 May
10 Jun
0 wk
31 May
31 May
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
15 May
8-10 wk
18 May
10 Jul
0 wk
28 May
30 Jun
1 wk after
Petunia
Petunia
Greenhouse
23 Feb – 23 Mar
28 Mar
8-12 wk
18 May
23 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
20 Apr
6-8 wk
20 May
1 Jun
0 wk
30 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
6 – 20 Apr
2 May
4-6 wk
18 May
30 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
3 May
4-6 wk
18 May
31 May
0 wk
31 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
8 Mar – 5 Apr
8-12 wk
31 May
2 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
15 Apr
8-12 wk
18 May
10 Jun
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
30 Mar
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
10 Jun
0 wk
19 May
31 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
19 May
6-8 wk
18 May
30 Jun
0 wk
2 May
20 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
2 Jun
4-6 wk
18 May
30 Jun
0 wk
31 May
20 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
26 May
3-4 wk
31 May
16 Jun
2 wk after
12 Jun
4 wk after
China aster
Callistephus chinensis
5 – 19 Apr
15 May
6-8 wk
31 May
26 Jun
2 wk after
30 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
23 Mar – 6 Apr
21 Apr
6-8 wk
18 May
2 Jun
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
15 Apr
8-12 wk
18 May
10 Jun
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
23 Mar – 6 Apr
21 Apr
6-8 wk
18 May
2 Jun
0 wk
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
5 May
6-8 wk
20 May
16 Jun
0 wk
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
5 Apr
8-10 wk
18 May
31 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
8 Jul
0 wk
19 May
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
15 – 29 Mar
26 Apr
8-10 wk
24 May
21 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
29 Apr
6-8 wk
18 May
10 Jun
0 wk
31 May
31 May
2 wk after