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Rel. frost
Last spring frost (0°C) 18 May Frost 9 of 10 years · 20 years of data
Frost-free season 91 days 18 May – 17 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
9 Jun
5-7 wk
18 May
14 Jul
0 wk
19 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
19 May
9 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
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 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
Greenhouse
19 – 26 Apr
22 May
4-5 wk
24 May
19 Jun
1 wk after
31 May
9 Jun
2 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)
Greenhouse
23 Feb – 23 Mar
21 Mar
8-12 wk
18 May
0 wk
18 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
0 wk
19 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
2 Jun
3-4 wk
20 May
23 Jun
0 wk
31 May
13 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
19 Jun
0 wk
18 May
9 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 Jul
0 wk
Potato
Solanum tuberosum
16 – 30 Apr
23 Apr
4-6 wk
28 May
1 wk after
28 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
4 Jun
5-7 wk
18 May
9 Jul
0 wk
19 May
29 Jun
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
30 Apr
3-4 wk
20 May
21 May
0 wk
31 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
23 Jun
3-4 wk
18 May
14 Jul
0 wk
19 May
4 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
6 May
2-4 wk
18 May
20 May
0 wk
18 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
0 wk
19 May
0 wk
Spinach
Spinacia oleracea
20 – 27 Apr
17 Jul
3-4 wk
18 May
7 Aug
0 wk
15 May
28 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
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
8 Jun
3-4 wk
18 May
29 Jun
0 wk
19 May
19 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
4 May
8-10 wk
18 May
29 Jun
0 wk
12 Jun
19 Jun
4 wk after
Dill
Anethum graveolens
19 May
23 Jun
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
30 May
6-8 wk
18 May
11 Jul
0 wk
19 May
1 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
14 May
8-12 wk
18 May
9 Jul
0 wk
12 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
18 May
13 Jul
0 wk
31 May
3 Jul
2 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
1 May
8-10 wk
20 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
6 May
8-10 wk
18 May
1 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
18 May
6-8 wk
18 May
29 Jun
0 wk
12 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
18 May
6-8 wk
18 May
29 Jun
0 wk
19 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
9 Feb – 9 Mar
18 Mar
10-14 wk
18 May
27 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
9 Jul
0 wk
19 May
29 Jun
0 wk
Statice
Limonium sinuatum
Season too short
9 – 23 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
Season too short
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
23 Mar – 6 Apr
30 Mar
6-8 wk
18 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
29 Mar – 26 Apr
13 Apr
4-8 wk
24 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
2 Apr
8-12 wk
24 May
28 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
23 Mar – 6 Apr
6-8 wk
18 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
Fleece
9 – 23 Mar
4 Apr
8-10 wk
18 May
30 May
0 wk
Love in a mist
Nigella damascena
18 May
14 Jun
0 wk
19 May
4 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
23 Feb – 23 Mar
4 Apr
8-12 wk
18 May
30 May
0 wk
Cardoon
Cynara cardunculus
Season too short
23 Feb – 23 Mar
14 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
29 Jun
0 wk
19 May
19 Jun
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
24 Apr
8-12 wk
18 May
19 Jun
0 wk
28 May
9 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
15 – 29 Mar
8-10 wk
24 May
1 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
25 May
5-8 wk
18 May
29 Jun
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
18 May
6-8 wk
18 May
29 Jun
0 wk
31 May
19 Jun
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 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
16 May
8-10 wk
18 May
11 Jul
0 wk
28 May
1 Jul
1 wk after
Petunia
Petunia
Season too short
23 Feb – 23 Mar
8-12 wk
18 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
23 Mar – 6 Apr
18 Apr
6-8 wk
18 May
30 May
0 wk
12 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
6 – 20 Apr
4-6 wk
18 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
13 Apr
4-6 wk
18 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
4 Apr
8-12 wk
18 May
30 May
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
31 Mar
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
8 Jun
0 wk
19 May
29 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
2 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
22 May
4-6 wk
18 May
19 Jun
0 wk
31 May
9 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
1 – 15 Mar
10-12 wk
24 May
1 wk after
Sunflower
Helianthus annuus
Fleece
26 Apr – 3 May
26 May
3-4 wk
24 May
16 Jun
1 wk after
31 May
6 Jun
2 wk after
China aster
Callistephus chinensis
Fleece
29 Mar – 12 Apr
15 May
6-8 wk
24 May
26 Jun
1 wk after
12 Jun
16 Jun
4 wk after
Annual phlox
Phlox drummondii
Season too short
23 Mar – 6 Apr
6-8 wk
18 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
4 Apr
8-12 wk
18 May
30 May
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
16 Apr
6-8 wk
20 May
28 May
0 wk
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
25 Mar
8-10 wk
18 May
20 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
26 Jun
0 wk
19 May
16 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
15 – 29 Mar
8 Apr
8-10 wk
24 May
3 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 Jun
2 wk after