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Rel. frost
Last spring frost (0°C) 20 May Frost 9 of 10 years · 20 years of data
Frost-free season 97 days 20 May – 25 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)
1 – 15 Apr
10 Jun
5-7 wk
20 May
15 Jul
0 wk
21 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
22 Jun
4-6 wk
20 May
20 Jul
0 wk
21 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
3 – 31 Mar
8-12 wk
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
6 Jun
5-7 wk
20 May
11 Jul
0 wk
20 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
28 Apr – 5 May
3-4 wk
26 May
1 wk after
Florence Fennel
Foeniculum vulgare
Greenhouse
21 – 28 Apr
24 May
4-5 wk
26 May
21 Jun
1 wk after
2 Jun
11 Jun
2 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
25 Feb – 25 Mar
17 Mar
8-12 wk
20 May
0 wk
20 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
21 May
0 wk
21 May
0 wk
Maize
Zea mays
Season too short
22 – 29 Apr
3-4 wk
20 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
8 Jun
3-4 wk
22 May
29 Jun
0 wk
2 Jun
19 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
21 Jun
0 wk
20 May
11 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
6 Jun
5-7 wk
20 May
11 Jul
0 wk
20 May
1 Jul
0 wk
Potato
Solanum tuberosum
18 Apr – 2 May
22 Apr
4-6 wk
30 May
1 wk after
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
6 Jun
5-7 wk
20 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
28 Apr – 5 May
3-4 wk
26 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
22 – 29 Apr
11 May
3-4 wk
20 May
1 Jun
0 wk
26 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
18 Jun
4-6 wk
20 May
16 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
25 Jun
3-4 wk
20 May
16 Jul
0 wk
21 May
6 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
18 Jun
4-6 wk
20 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
6 May
2-4 wk
20 May
20 May
0 wk
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
21 May
0 wk
21 May
0 wk
Spinach
Spinacia oleracea
22 – 29 Apr
10 Jul
3-4 wk
20 May
31 Jul
0 wk
17 May
21 Jul
0 wk
Sweet potato
Ipomoea batatas
14 – 28 Jun
4-6 wk
26 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
22 Apr – 6 May
2-4 wk
20 May
0 wk
2 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
18 Jun
4-6 wk
20 May
16 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
10 Jun
3-4 wk
20 May
1 Jul
0 wk
21 May
21 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
14 – 28 Apr
4-6 wk
26 May
1 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
6 May
8-10 wk
20 May
1 Jul
0 wk
14 Jun
21 Jun
4 wk after
Dill
Anethum graveolens
21 May
29 Jun
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
30 May
6-8 wk
20 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
15 May
8-12 wk
20 May
10 Jul
0 wk
14 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
20 May
19 Jul
0 wk
2 Jun
9 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
1 May
8-10 wk
22 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
6 May
8-10 wk
20 May
1 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
19 May
6-8 wk
20 May
30 Jun
0 wk
14 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
19 May
6-8 wk
20 May
30 Jun
0 wk
21 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
11 Feb – 11 Mar
23 Mar
10-14 wk
20 May
1 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
28 Apr – 5 May
3-4 wk
26 May
1 wk after
Cornflower
Centaurea cyanus
20 May
10 Jul
0 wk
21 May
30 Jun
0 wk
Statice
Limonium sinuatum
Season too short
11 – 25 Mar
14 Mar
8-10 wk
20 May
0 wk
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
25 Mar – 8 Apr
28 Mar
6-8 wk
20 May
0 wk
21 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
25 Mar – 8 Apr
7 Apr
6-8 wk
20 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
31 Mar – 28 Apr
21 Apr
4-8 wk
26 May
1 wk after
26 May
1 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
2 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
3 – 31 Mar
20 Apr
8-12 wk
26 May
15 Jun
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
25 Mar – 8 Apr
7 Apr
6-8 wk
20 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
Fleece
11 – 25 Mar
6 Apr
8-10 wk
20 May
1 Jun
0 wk
Love in a mist
Nigella damascena
20 May
16 Jun
0 wk
21 May
6 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
21 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
25 Feb – 25 Mar
6 Apr
8-12 wk
20 May
1 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
25 Feb – 25 Mar
7 Mar
8-12 wk
20 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
3 – 31 Mar
8-12 wk
26 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
31 Mar – 14 Apr
6-8 wk
26 May
1 wk after
Corn poppy
Papaver rhoeas
20 May
1 Jul
0 wk
21 May
21 Jun
0 wk
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
26 Apr
8-12 wk
20 May
21 Jun
0 wk
30 May
11 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
17 – 31 Mar
24 Mar
8-10 wk
26 May
1 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
26 May
5-8 wk
20 May
30 Jun
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
20 May
6-8 wk
20 May
1 Jul
0 wk
2 Jun
21 Jun
2 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
30 Apr
6-8 wk
20 May
11 Jun
0 wk
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
14 – 28 Apr
4-6 wk
26 May
1 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
16 May
8-10 wk
20 May
11 Jul
0 wk
30 May
1 Jul
1 wk after
Petunia
Petunia
Season too short
25 Feb – 25 Mar
14 Mar
8-12 wk
20 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
25 Mar – 8 Apr
20 Apr
6-8 wk
20 May
1 Jun
0 wk
14 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
8 – 22 Apr
4-6 wk
20 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
21 Apr – 5 May
3-5 wk
26 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
8 – 22 Apr
21 Apr
4-6 wk
20 May
0 wk
2 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
10 Mar – 7 Apr
8-12 wk
2 Jun
2 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
6 Apr
8-12 wk
20 May
1 Jun
0 wk
14 Jun
4 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
31 Mar
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
1 Jun
0 wk
21 May
22 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
20 May
6-8 wk
20 May
1 Jul
0 wk
4 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
24 May
4-6 wk
20 May
21 Jun
0 wk
2 Jun
11 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
3 – 17 Mar
10-12 wk
26 May
1 wk after
Sunflower
Helianthus annuus
Fleece
28 Apr – 5 May
31 May
3-4 wk
26 May
21 Jun
1 wk after
2 Jun
11 Jun
2 wk after
China aster
Callistephus chinensis
7 – 21 Apr
2 May
6-8 wk
2 Jun
13 Jun
2 wk after
2 Jul
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
25 Mar – 8 Apr
7 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
6 Apr
8-12 wk
20 May
1 Jun
0 wk
14 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
25 Mar – 8 Apr
7 Apr
6-8 wk
20 May
0 wk
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
22 Apr
6-8 wk
22 May
3 Jun
0 wk
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
27 Mar
8-10 wk
20 May
22 May
0 wk
14 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
17 Mar – 14 Apr
6-10 wk
26 May
1 wk after
California goldenpoppy
Eschscholzia californica
20 May
1 Jul
0 wk
21 May
21 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
17 – 31 Mar
14 Apr
8-10 wk
26 May
9 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
30 Apr
6-8 wk
20 May
11 Jun
0 wk
2 Jun
2 wk after