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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 9 of 10 years · 20 years of data
Frost-free season 88 days 21 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)
2 – 16 Apr
8 Jun
5-7 wk
21 May
13 Jul
0 wk
22 May
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
20 Jun
4-6 wk
21 May
18 Jul
0 wk
22 May
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Florence Fennel
Foeniculum vulgare
Greenhouse
22 – 29 Apr
18 May
4-5 wk
27 May
15 Jun
1 wk after
3 Jun
5 Jun
2 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
26 Feb – 26 Mar
12 Mar
8-12 wk
21 May
0 wk
27 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
0 wk
22 May
0 wk
Maize
Zea mays
Season too short
23 – 30 Apr
3-4 wk
21 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
2 Jun
3-4 wk
23 May
23 Jun
0 wk
3 Jun
13 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
15 Jun
0 wk
21 May
5 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
23 Apr
4-6 wk
31 May
1 wk after
31 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
31 May
5-7 wk
21 May
5 Jul
0 wk
22 May
25 Jun
0 wk
Pumpkin
Cucurbita pepo
Season too short
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
23 – 30 Apr
16 May
3-4 wk
21 May
6 Jun
0 wk
27 May
27 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
19 Jun
3-4 wk
21 May
10 Jul
0 wk
22 May
30 Jun
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
8 May
2-4 wk
21 May
22 May
0 wk
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
10 Jul
3-4 wk
21 May
31 Jul
0 wk
18 May
21 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
23 Apr – 7 May
2-4 wk
21 May
0 wk
3 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
4 Jun
3-4 wk
21 May
25 Jun
0 wk
22 May
15 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
15 – 29 Apr
4-6 wk
27 May
1 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
30 Apr
8-10 wk
21 May
25 Jun
0 wk
15 Jun
15 Jun
4 wk after
Dill
Anethum graveolens
22 May
23 Jun
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
13 May
8-12 wk
21 May
8 Jul
0 wk
15 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
21 May
13 Jul
0 wk
3 Jun
3 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
1 May
8-10 wk
23 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
6 May
8-10 wk
21 May
1 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
17 May
6-8 wk
21 May
28 Jun
0 wk
15 Jun
18 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
17 May
6-8 wk
21 May
28 Jun
0 wk
22 May
18 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
12 Feb – 12 Mar
13 Mar
10-14 wk
21 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
29 Apr – 6 May
3-4 wk
27 May
1 wk after
Cornflower
Centaurea cyanus
21 May
8 Jul
0 wk
22 May
28 Jun
0 wk
Statice
Limonium sinuatum
Season too short
12 – 26 Mar
8-10 wk
21 May
0 wk
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
26 Mar – 9 Apr
30 Mar
6-8 wk
21 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
1 – 29 Apr
13 Apr
4-8 wk
27 May
1 wk after
27 May
1 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Season too short
4 Mar – 1 Apr
26 Mar
8-12 wk
27 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
26 Mar – 9 Apr
28 Mar
6-8 wk
21 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
Fleece
12 – 26 Mar
31 Mar
8-10 wk
21 May
26 May
0 wk
Love in a mist
Nigella damascena
21 May
10 Jun
0 wk
22 May
31 May
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
22 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
Fleece
26 Feb – 26 Mar
31 Mar
8-12 wk
21 May
26 May
0 wk
Cardoon
Cynara cardunculus
Season too short
26 Feb – 26 Mar
7 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
1 – 15 Apr
6-8 wk
27 May
1 wk after
Corn poppy
Papaver rhoeas
21 May
25 Jun
0 wk
22 May
15 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
20 Apr
8-12 wk
21 May
15 Jun
0 wk
31 May
5 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
18 Mar – 1 Apr
8-10 wk
27 May
1 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
24 May
5-8 wk
21 May
28 Jun
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
14 May
6-8 wk
21 May
25 Jun
0 wk
3 Jun
15 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
15 – 29 Apr
4-6 wk
27 May
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
14 May
8-10 wk
21 May
9 Jul
0 wk
31 May
29 Jun
1 wk after
Petunia
Petunia
Season too short
26 Feb – 26 Mar
4 Mar
8-12 wk
21 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
Fleece
26 Mar – 9 Apr
14 Apr
6-8 wk
21 May
26 May
0 wk
15 Jun
4 wk after
Common zinnia
Zinnia elegans
Season too short
9 – 23 Apr
4-6 wk
21 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
22 Apr – 6 May
3-5 wk
27 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
9 – 23 Apr
13 Apr
4-6 wk
21 May
0 wk
3 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
11 Mar – 8 Apr
8-12 wk
3 Jun
2 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
31 Mar
8-12 wk
21 May
26 May
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
31 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
1 Jun
0 wk
22 May
22 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
5 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
18 May
4-6 wk
21 May
15 Jun
0 wk
3 Jun
5 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
4 – 18 Mar
10-12 wk
27 May
1 wk after
Sunflower
Helianthus annuus
Fleece
29 Apr – 6 May
21 May
3-4 wk
27 May
11 Jun
1 wk after
3 Jun
2 wk after
China aster
Callistephus chinensis
Fleece
1 – 15 Apr
10 May
6-8 wk
27 May
21 Jun
1 wk after
15 Jun
4 wk after
Annual phlox
Phlox drummondii
Season too short
26 Mar – 9 Apr
28 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
31 Mar
8-12 wk
21 May
26 May
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
26 Mar – 9 Apr
28 Mar
6-8 wk
21 May
0 wk
Black-eyed Susan
Rudbeckia hirta
Fleece
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
15 Jun
4 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
21 Mar
8-10 wk
21 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
18 Mar – 15 Apr
6-10 wk
27 May
1 wk after
California goldenpoppy
Eschscholzia californica
21 May
21 Jun
0 wk
22 May
11 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
8 Apr
8-10 wk
27 May
3 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after