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Rel. frost
Last spring frost (0°C) 15 May Frost 9 of 10 years · 20 years of data
Frost-free season 89 days 15 May – 12 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)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
20 Jun
4-6 wk
15 May
18 Jul
0 wk
16 May
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
6 Jun
5-7 wk
15 May
11 Jul
0 wk
15 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
23 – 30 Apr
28 Apr
4-5 wk
28 May
2 wk after
9 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
20 Feb – 20 Mar
13 Mar
8-12 wk
15 May
0 wk
21 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 May
20 May
0 wk
16 May
0 wk
Maize
Zea mays
Season too short
17 – 24 Apr
3-4 wk
15 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
25 May
3-4 wk
17 May
15 Jun
0 wk
28 May
5 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
24 Jun
0 wk
15 May
14 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
6 Jun
5-7 wk
15 May
11 Jul
0 wk
15 May
1 Jul
0 wk
Potato
Solanum tuberosum
13 – 27 Apr
27 Apr
4-6 wk
25 May
25 May
1 wk after
25 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
9 Jun
5-7 wk
15 May
14 Jul
0 wk
16 May
4 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
10 May
3-4 wk
17 May
31 May
0 wk
28 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
28 Jun
3-4 wk
15 May
19 Jul
0 wk
16 May
9 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
11 May
2-4 wk
15 May
25 May
0 wk
15 May
15 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 May
20 May
0 wk
16 May
0 wk
Spinach
Spinacia oleracea
17 – 24 Apr
16 Jul
3-4 wk
15 May
6 Aug
0 wk
12 May
27 Jul
0 wk
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
17 Apr – 1 May
2-4 wk
15 May
0 wk
28 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
13 Jun
3-4 wk
15 May
4 Jul
0 wk
16 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
9 – 23 Apr
4-6 wk
21 May
1 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
9 May
8-10 wk
15 May
4 Jul
0 wk
9 Jun
24 Jun
4 wk after
Dill
Anethum graveolens
16 May
15 Jun
0 wk
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
30 May
6-8 wk
15 May
11 Jul
0 wk
16 May
1 Jul
0 wk
Spearmint
Mentha spicata
20 Feb – 20 Mar
13 May
8-12 wk
15 May
8 Jul
0 wk
9 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
15 May
5 Jul
0 wk
28 May
25 Jun
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
1 May
8-10 wk
17 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
6 May
8-10 wk
15 May
1 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
17 May
6-8 wk
15 May
28 Jun
0 wk
9 Jun
18 Jun
4 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
17 May
6-8 wk
15 May
28 Jun
0 wk
16 May
18 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
6 Feb – 6 Mar
10 Mar
10-14 wk
15 May
19 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
23 – 30 Apr
3-4 wk
21 May
1 wk after
Cornflower
Centaurea cyanus
15 May
8 Jul
0 wk
16 May
28 Jun
0 wk
Statice
Limonium sinuatum
Season too short
6 – 20 Mar
8-10 wk
15 May
0 wk
Sweet William
Dianthus barbatus
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
25 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
16 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
20 Mar – 3 Apr
25 Mar
6-8 wk
15 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
26 Mar – 23 Apr
8 Apr
4-8 wk
21 May
1 wk after
21 May
1 wk after
Foxglove
Digitalis purpurea
6 – 20 Mar
8-10 wk
15 May
0 wk
28 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
26 Feb – 26 Mar
5 Apr
8-12 wk
21 May
31 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
20 Mar – 3 Apr
22 Mar
6-8 wk
15 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
4-6 wk
28 May
2 wk after
Chinese lantern
Physalis alkekengi
Fleece
6 – 20 Mar
9 Apr
8-10 wk
15 May
4 Jun
0 wk
Love in a mist
Nigella damascena
15 May
19 Jun
0 wk
16 May
9 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
16 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
20 Feb – 20 Mar
9 Apr
8-12 wk
15 May
4 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
20 Feb – 20 Mar
13 Mar
8-12 wk
15 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
1 wk after
Corn poppy
Papaver rhoeas
15 May
4 Jul
0 wk
16 May
24 Jun
0 wk
Snapdragon
Antirrhinum majus
20 Feb – 20 Mar
29 Apr
8-12 wk
15 May
24 Jun
0 wk
25 May
14 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
12 – 26 Mar
8-10 wk
21 May
1 wk after
Sweet pea
Lathyrus odoratus
20 Mar – 10 Apr
24 May
5-8 wk
15 May
28 Jun
0 wk
Stock
Matthiola incana
20 Mar – 3 Apr
23 May
6-8 wk
15 May
4 Jul
0 wk
28 May
24 Jun
2 wk after
Wormwood
Artemisia absinthium
20 Mar – 3 Apr
30 Apr
6-8 wk
15 May
11 Jun
0 wk
28 May
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
9 – 23 Apr
4-6 wk
21 May
1 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
14 May
8-10 wk
15 May
9 Jul
0 wk
25 May
29 Jun
1 wk after
Petunia
Petunia
Season too short
20 Feb – 20 Mar
26 Feb
8-12 wk
15 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
20 Mar – 3 Apr
23 Apr
6-8 wk
15 May
4 Jun
0 wk
9 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
3 – 17 Apr
4-6 wk
15 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
16 – 30 Apr
3-5 wk
21 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
3 – 17 Apr
8 Apr
4-6 wk
15 May
0 wk
28 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
5 Mar – 2 Apr
8-12 wk
28 May
2 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
9 Apr
8-12 wk
15 May
4 Jun
0 wk
9 Jun
4 wk after
Yarrow
Achillea millefolium
20 Mar – 3 Apr
31 Mar
6-8 wk
15 May
0 wk
28 May
2 wk after
Safflower
Carthamus tinctorius
15 May
7 Jun
0 wk
16 May
28 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
20 Mar – 3 Apr
20 May
6-8 wk
15 May
1 Jul
0 wk
29 Apr
21 Jun
2 wk before
Bishop's flower
Ammi majus
3 – 17 Apr
27 May
4-6 wk
15 May
24 Jun
0 wk
28 May
14 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
26 Feb – 12 Mar
10-12 wk
21 May
1 wk after
Sunflower
Helianthus annuus
Fleece
23 – 30 Apr
18 May
3-4 wk
21 May
8 Jun
1 wk after
28 May
29 May
2 wk after
China aster
Callistephus chinensis
Fleece
26 Mar – 9 Apr
7 May
6-8 wk
21 May
18 Jun
1 wk after
9 Jun
4 wk after
Annual phlox
Phlox drummondii
Season too short
20 Mar – 3 Apr
22 Mar
6-8 wk
15 May
0 wk
28 May
2 wk after
Hollyhock
Alcea rosea
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
9 Apr
8-12 wk
15 May
4 Jun
0 wk
9 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
20 Mar – 3 Apr
22 Mar
6-8 wk
15 May
0 wk
Black-eyed Susan
Rudbeckia hirta
Fleece
20 Mar – 3 Apr
27 Apr
6-8 wk
15 May
8 Jun
0 wk
9 Jun
4 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
30 Mar
8-10 wk
15 May
25 May
0 wk
9 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
12 Mar – 9 Apr
6-10 wk
21 May
1 wk after
California goldenpoppy
Eschscholzia californica
15 May
18 Jun
0 wk
16 May
8 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
12 – 26 Mar
31 Mar
8-10 wk
21 May
26 May
1 wk after
Water forget-me-not
Myosotis scorpioides
20 Mar – 3 Apr
30 Apr
6-8 wk
15 May
11 Jun
0 wk
28 May
1 Jun
2 wk after