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Method
Rel. frost
Last spring frost (0°C) 22 May Frost 9 of 10 years · 20 years of data
Frost-free season 90 days 22 May – 20 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)
3 – 17 Apr
12 Jun
5-7 wk
22 May
17 Jul
0 wk
23 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
24 Jun
4-6 wk
22 May
22 Jul
0 wk
23 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
5 Mar – 2 Apr
8-12 wk
28 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Apr
7 Jun
5-7 wk
22 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
30 Apr – 7 May
3-4 wk
28 May
1 wk after
Florence Fennel
Foeniculum vulgare
Greenhouse
23 – 30 Apr
26 May
4-5 wk
28 May
23 Jun
1 wk after
4 Jun
13 Jun
2 wk after
Butter bean
Phaseolus lunatus
Season too short
2 – 9 Jun
3-4 wk
30 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
27 Feb – 27 Mar
20 Mar
8-12 wk
22 May
0 wk
22 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
0 wk
23 May
0 wk
Maize
Zea mays
Season too short
24 Apr – 1 May
3-4 wk
22 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
15 Jun
3-4 wk
24 May
6 Jul
0 wk
4 Jun
26 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
23 Jun
0 wk
22 May
13 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Apr
7 Jun
5-7 wk
22 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Potato
Solanum tuberosum
20 Apr – 4 May
23 Apr
4-6 wk
1 Jun
1 wk after
1 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Apr
8 Jun
5-7 wk
22 May
13 Jul
0 wk
23 May
3 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
30 Apr – 7 May
3-4 wk
28 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
24 Apr – 1 May
17 May
3-4 wk
22 May
7 Jun
0 wk
28 May
28 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Lettuce
Lactuca sativa
24 Apr – 1 May
27 Jun
3-4 wk
22 May
18 Jul
0 wk
23 May
8 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
7 May
2-4 wk
22 May
0 wk
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
0 wk
23 May
0 wk
Spinach
Spinacia oleracea
24 Apr – 1 May
21 Jul
3-4 wk
22 May
11 Aug
0 wk
19 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
24 Apr – 8 May
2-4 wk
22 May
0 wk
4 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Garden pea
Pisum sativum
24 Apr – 1 May
12 Jun
3-4 wk
22 May
3 Jul
0 wk
23 May
23 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
16 – 30 Apr
4-6 wk
28 May
1 wk after
Lemon balm
Melissa officinalis
13 – 27 Mar
8 May
8-10 wk
22 May
3 Jul
0 wk
16 Jun
23 Jun
4 wk after
Dill
Anethum graveolens
23 May
6 Jul
0 wk
Wild chives
Allium schoenoprasum
27 Mar – 10 Apr
31 May
6-8 wk
22 May
12 Jul
0 wk
23 May
2 Jul
0 wk
Spearmint
Mentha spicata
27 Feb – 27 Mar
17 May
8-12 wk
22 May
12 Jul
0 wk
16 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
22 May
26 Jul
0 wk
4 Jun
16 Jul
2 wk after
Garden sage
Salvia officinalis
15 – 29 Mar
2 May
8-10 wk
24 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
13 – 27 Mar
7 May
8-10 wk
22 May
2 Jul
0 wk
Oregano
Origanum vulgare
27 Mar – 10 Apr
21 May
6-8 wk
22 May
2 Jul
0 wk
16 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
27 Mar – 10 Apr
21 May
6-8 wk
22 May
2 Jul
0 wk
23 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
13 Feb – 13 Mar
20 Mar
10-14 wk
22 May
29 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
30 Apr – 7 May
3-4 wk
28 May
1 wk after
Cornflower
Centaurea cyanus
22 May
12 Jul
0 wk
23 May
2 Jul
0 wk
Statice
Limonium sinuatum
Season too short
13 – 27 Mar
8-10 wk
22 May
0 wk
Sweet William
Dianthus barbatus
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
1 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
23 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
27 Mar – 10 Apr
2 Apr
6-8 wk
22 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
2 – 30 Apr
16 Apr
4-8 wk
28 May
1 wk after
28 May
1 wk after
Foxglove
Digitalis purpurea
13 – 27 Mar
8-10 wk
22 May
0 wk
4 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Season too short
5 Mar – 2 Apr
29 Mar
8-12 wk
28 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
23 Apr – 7 May
4-6 wk
4 Jun
2 wk after
Chinese lantern
Physalis alkekengi
15 – 29 Mar
1 Apr
8-10 wk
24 May
27 May
0 wk
Love in a mist
Nigella damascena
22 May
18 Jun
0 wk
23 May
8 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
23 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
1 – 29 Mar
1 Apr
8-12 wk
24 May
27 May
0 wk
Cardoon
Cynara cardunculus
Season too short
27 Feb – 27 Mar
18 Mar
8-12 wk
22 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
5 Mar – 2 Apr
8-12 wk
28 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
2 – 16 Apr
6-8 wk
28 May
1 wk after
Corn poppy
Papaver rhoeas
22 May
3 Jul
0 wk
23 May
23 Jun
0 wk
Snapdragon
Antirrhinum majus
27 Feb – 27 Mar
28 Apr
8-12 wk
22 May
23 Jun
0 wk
1 Jun
13 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
19 Mar – 2 Apr
8-10 wk
28 May
1 wk after
Sweet pea
Lathyrus odoratus
27 Mar – 17 Apr
28 May
5-8 wk
22 May
2 Jul
0 wk
Stock
Matthiola incana
27 Mar – 10 Apr
22 May
6-8 wk
22 May
3 Jul
0 wk
4 Jun
23 Jun
2 wk after
Wormwood
Artemisia absinthium
27 Mar – 10 Apr
1 May
6-8 wk
22 May
12 Jun
0 wk
4 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
16 – 30 Apr
4-6 wk
28 May
1 wk after
Garden pansy
Viola × wittrockiana
13 – 27 Mar
17 May
8-10 wk
22 May
12 Jul
0 wk
1 Jun
2 Jul
1 wk after
Petunia
Petunia
Season too short
27 Feb – 27 Mar
27 Feb
8-12 wk
22 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
29 Mar – 12 Apr
15 Apr
6-8 wk
24 May
27 May
0 wk
4 Jul
6 wk after
Common zinnia
Zinnia elegans
Season too short
10 – 24 Apr
4-6 wk
22 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
23 Apr – 7 May
3-5 wk
28 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
10 – 24 Apr
16 Apr
4-6 wk
22 May
0 wk
4 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
12 Mar – 9 Apr
8-12 wk
4 Jun
2 wk after
Bee balm
Monarda didyma
27 Feb – 27 Mar
8 Apr
8-12 wk
22 May
3 Jun
0 wk
16 Jun
4 wk after
Yarrow
Achillea millefolium
27 Mar – 10 Apr
1 Apr
6-8 wk
22 May
0 wk
4 Jun
2 wk after
Safflower
Carthamus tinctorius
22 May
12 Jun
0 wk
23 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
27 Mar – 10 Apr
21 May
6-8 wk
22 May
2 Jul
0 wk
6 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
10 – 24 Apr
26 May
4-6 wk
22 May
23 Jun
0 wk
4 Jun
13 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
5 – 19 Mar
10-12 wk
28 May
1 wk after
Sunflower
Helianthus annuus
Fleece
30 Apr – 7 May
28 May
3-4 wk
28 May
18 Jun
1 wk after
4 Jun
8 Jun
2 wk after
China aster
Callistephus chinensis
Fleece
2 – 16 Apr
17 May
6-8 wk
28 May
28 Jun
1 wk after
16 Jun
18 Jun
4 wk after
Annual phlox
Phlox drummondii
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
4 Jun
2 wk after
Hollyhock
Alcea rosea
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
4 Jun
2 wk after
Alpine delphinium
Delphinium elatum
27 Feb – 27 Mar
8 Apr
8-12 wk
22 May
3 Jun
0 wk
16 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
0 wk
Black-eyed Susan
Rudbeckia hirta
29 Mar – 12 Apr
20 Apr
6-8 wk
24 May
1 Jun
0 wk
4 Jul
6 wk after
Wood sage
Salvia nemorosa
13 – 27 Mar
29 Mar
8-10 wk
22 May
24 May
0 wk
16 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
19 Mar – 16 Apr
6-10 wk
28 May
1 wk after
California goldenpoppy
Eschscholzia californica
22 May
28 Jun
0 wk
23 May
18 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
19 Mar – 2 Apr
21 Apr
8-10 wk
28 May
16 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
27 Mar – 10 Apr
1 May
6-8 wk
22 May
12 Jun
0 wk
4 Jun
2 wk after