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Method
Rel. frost
Last spring frost (0°C) 20 May Frost 9 of 10 years · 20 years of data
Frost-free season 102 days 20 May – 30 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
12 Jun
5-7 wk
20 May
17 Jul
0 wk
21 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
24 Jun
4-6 wk
20 May
22 Jul
0 wk
21 May
12 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
7 Jun
5-7 wk
20 May
12 Jul
0 wk
20 May
2 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
4 Jun
4-5 wk
26 May
2 Jul
1 wk after
2 Jun
22 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
13 Mar
8-12 wk
20 May
0 wk
20 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
11 May
28 May
1 wk before
11 May
18 May
1 wk before
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
26 Jun
3-4 wk
22 May
17 Jul
0 wk
2 Jun
7 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
2 Jul
0 wk
20 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
7 Jun
5-7 wk
20 May
12 Jul
0 wk
20 May
2 Jul
0 wk
Potato
Solanum tuberosum
Season too short
5 – 19 Apr
4-6 wk
17 May
0 wk
17 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
17 Jun
5-7 wk
20 May
22 Jul
0 wk
21 May
12 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)
Greenhouse
22 – 29 Apr
24 Apr
3-4 wk
20 May
0 wk
20 May
0 wk
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
6 Jul
3-4 wk
20 May
27 Jul
0 wk
21 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Greenhouse
6 – 20 Apr
21 May
2-4 wk
4 May
4 Jun
2 wk before
4 May
25 May
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
11 May
28 May
1 wk before
11 May
18 May
1 wk before
Spinach
Spinacia oleracea
22 – 29 Apr
21 Jul
3-4 wk
20 May
11 Aug
0 wk
17 May
1 Aug
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
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
21 Jun
3-4 wk
20 May
12 Jul
0 wk
21 May
2 Jul
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
17 May
8-10 wk
20 May
12 Jul
0 wk
14 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
21 May
17 Jul
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
31 May
6-8 wk
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
17 May
8-12 wk
20 May
12 Jul
0 wk
14 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
20 May
6 Aug
0 wk
2 Jun
27 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
2 May
8-10 wk
22 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
7 May
8-10 wk
20 May
2 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
14 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
21 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
11 Feb – 11 Mar
2 Apr
10-14 wk
20 May
11 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
12 Jul
0 wk
21 May
2 Jul
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
12 Apr
6-8 wk
20 May
24 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
31 Mar – 28 Apr
26 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
Season too short
3 – 31 Mar
5 Apr
8-12 wk
26 May
31 May
1 wk after
Creeping zinnia
Sanvitalia procumbens
Season too short
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
13 – 27 Mar
12 Apr
8-10 wk
22 May
7 Jun
0 wk
Love in a mist
Nigella damascena
20 May
27 Jun
0 wk
21 May
17 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
27 Feb – 27 Mar
12 Apr
8-12 wk
22 May
7 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
25 Feb – 25 Mar
18 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
12 Jul
0 wk
21 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
7 May
8-12 wk
20 May
2 Jul
0 wk
30 May
22 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
28 May
5-8 wk
20 May
2 Jul
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
31 May
6-8 wk
20 May
12 Jul
0 wk
2 Jun
2 Jul
2 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
1 May
6-8 wk
20 May
12 Jun
0 wk
2 Jun
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
17 May
8-10 wk
20 May
12 Jul
0 wk
30 May
2 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
27 Mar – 10 Apr
26 Apr
6-8 wk
22 May
7 Jun
0 wk
2 Jul
6 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
Season too short
8 – 22 Apr
26 Apr
4-6 wk
20 May
24 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
17 Apr
8-12 wk
20 May
12 Jun
0 wk
14 Jun
4 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
1 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
4 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
4 Jun
4-6 wk
20 May
2 Jul
0 wk
2 Jun
22 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
10 Jun
3-4 wk
26 May
1 Jul
1 wk after
2 Jun
21 Jun
2 wk after
China aster
Callistephus chinensis
7 – 21 Apr
18 May
6-8 wk
2 Jun
29 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
17 Apr
8-12 wk
20 May
12 Jun
0 wk
14 Jun
4 wk after
African marigold
Tagetes erecta
Season too short
25 Mar – 8 Apr
7 Apr
6-8 wk
20 May
0 wk
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
8 May
6-8 wk
22 May
19 Jun
0 wk
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
7 Apr
8-10 wk
20 May
2 Jun
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
11 Jul
0 wk
21 May
1 Jul
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
17 – 31 Mar
2 May
8-10 wk
26 May
27 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
1 May
6-8 wk
20 May
12 Jun
0 wk
2 Jun
2 Jun
2 wk after