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Method
Rel. frost
Last spring frost (0°C) 17 May Frost 9 of 10 years · 20 years of data
Frost-free season 98 days 17 May – 23 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)
29 Mar – 12 Apr
12 Jun
5-7 wk
17 May
17 Jul
0 wk
18 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
5 – 19 Apr
24 Jun
4-6 wk
17 May
22 Jul
0 wk
18 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
28 Feb – 28 Mar
8-12 wk
23 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
29 Mar – 12 Apr
7 Jun
5-7 wk
17 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
25 Apr – 2 May
18 May
4-5 wk
30 May
15 Jun
2 wk after
11 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
28 May – 4 Jun
3-4 wk
25 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
22 Feb – 22 Mar
12 Mar
8-12 wk
17 May
0 wk
30 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 May
27 May
0 wk
18 May
0 wk
Maize
Zea mays
Season too short
19 – 26 Apr
3-4 wk
17 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
21 – 28 Apr
14 Jun
3-4 wk
19 May
5 Jul
0 wk
30 May
25 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
17 May
28 Jun
0 wk
17 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
29 Mar – 12 Apr
7 Jun
5-7 wk
17 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Potato
Solanum tuberosum
15 – 29 Apr
12 May
4-6 wk
27 May
9 Jun
1 wk after
27 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
29 Mar – 12 Apr
13 Jun
5-7 wk
17 May
18 Jul
0 wk
18 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
21 – 28 Apr
16 May
3-4 wk
19 May
6 Jun
0 wk
30 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Lettuce
Lactuca sativa
19 – 26 Apr
2 Jul
3-4 wk
17 May
23 Jul
0 wk
18 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
19 Apr – 3 May
18 May
2-4 wk
17 May
1 Jun
0 wk
17 May
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 May
27 May
0 wk
18 May
0 wk
Spinach
Spinacia oleracea
19 – 26 Apr
20 Jul
3-4 wk
17 May
10 Aug
0 wk
14 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
11 – 25 Jun
4-6 wk
23 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
22 Mar – 5 Apr
6-8 wk
17 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
19 Apr – 3 May
2-4 wk
17 May
0 wk
30 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Garden pea
Pisum sativum
19 – 26 Apr
17 Jun
3-4 wk
17 May
8 Jul
0 wk
18 May
28 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
11 – 25 Apr
4-6 wk
23 May
1 wk after
Lemon balm
Melissa officinalis
8 – 22 Mar
13 May
8-10 wk
17 May
8 Jul
0 wk
11 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
18 May
5 Jul
0 wk
Wild chives
Allium schoenoprasum
22 Mar – 5 Apr
31 May
6-8 wk
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Spearmint
Mentha spicata
22 Feb – 22 Mar
17 May
8-12 wk
17 May
12 Jul
0 wk
11 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
17 May
25 Jul
0 wk
30 May
15 Jul
2 wk after
Garden sage
Salvia officinalis
10 – 24 Mar
2 May
8-10 wk
19 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
8 – 22 Mar
7 May
8-10 wk
17 May
2 Jul
0 wk
Oregano
Origanum vulgare
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
11 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
18 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
10 Feb – 10 Mar
10 Mar
10-14 wk
19 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
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Cornflower
Centaurea cyanus
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
8 – 22 Mar
20 Mar
8-10 wk
17 May
0 wk
Sweet William
Dianthus barbatus
22 Mar – 5 Apr
6-8 wk
17 May
0 wk
27 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
22 Mar – 5 Apr
3 Apr
6-8 wk
17 May
0 wk
18 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
22 Mar – 5 Apr
5 Apr
6-8 wk
17 May
17 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
4 Apr – 2 May
10 Apr
4-8 wk
30 May
2 wk after
30 May
2 wk after
Foxglove
Digitalis purpurea
8 – 22 Mar
8-10 wk
17 May
0 wk
30 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
28 Feb – 28 Mar
8 May
8-12 wk
23 May
3 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
22 Mar – 5 Apr
13 Apr
6-8 wk
17 May
25 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
18 Apr – 2 May
4-6 wk
30 May
2 wk after
Chinese lantern
Physalis alkekengi
10 – 24 Mar
31 Mar
8-10 wk
19 May
26 May
0 wk
Love in a mist
Nigella damascena
17 May
23 Jun
0 wk
18 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
22 Mar – 5 Apr
24 Mar
6-8 wk
17 May
0 wk
18 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
24 Feb – 24 Mar
31 Mar
8-12 wk
19 May
26 May
0 wk
Cardoon
Cynara cardunculus
Season too short
22 Feb – 22 Mar
17 Mar
8-12 wk
17 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
28 Feb – 28 Mar
8-12 wk
23 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
1 wk after
Corn poppy
Papaver rhoeas
17 May
8 Jul
0 wk
18 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
22 Feb – 22 Mar
3 May
8-12 wk
17 May
28 Jun
0 wk
27 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
14 – 28 Mar
30 Mar
8-10 wk
23 May
25 May
1 wk after
Sweet pea
Lathyrus odoratus
22 Mar – 12 Apr
28 May
5-8 wk
17 May
2 Jul
0 wk
Stock
Matthiola incana
22 Mar – 5 Apr
27 May
6-8 wk
17 May
8 Jul
0 wk
30 May
28 Jun
2 wk after
Wormwood
Artemisia absinthium
22 Mar – 5 Apr
1 May
6-8 wk
17 May
12 Jun
0 wk
30 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
11 – 25 Apr
4-6 wk
23 May
1 wk after
Garden pansy
Viola × wittrockiana
8 – 22 Mar
17 May
8-10 wk
17 May
12 Jul
0 wk
27 May
2 Jul
1 wk after
Petunia
Petunia
Greenhouse
22 Feb – 22 Mar
20 Mar
8-12 wk
17 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
24 Mar – 7 Apr
14 Apr
6-8 wk
19 May
26 May
0 wk
29 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
5 – 19 Apr
20 Apr
4-6 wk
17 May
18 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
18 Apr – 2 May
3-5 wk
23 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
5 – 19 Apr
19 Apr
4-6 wk
17 May
17 May
0 wk
30 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
7 Mar – 4 Apr
8-12 wk
30 May
2 wk after
Bee balm
Monarda didyma
22 Feb – 22 Mar
13 Apr
8-12 wk
17 May
8 Jun
0 wk
11 Jun
4 wk after
Yarrow
Achillea millefolium
22 Mar – 5 Apr
1 Apr
6-8 wk
17 May
0 wk
30 May
2 wk after
Safflower
Carthamus tinctorius
17 May
11 Jun
0 wk
18 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
1 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
5 – 19 Apr
31 May
4-6 wk
17 May
28 Jun
0 wk
30 May
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
28 Feb – 14 Mar
10-12 wk
23 May
1 wk after
Sunflower
Helianthus annuus
2 – 9 May
18 May
3-4 wk
30 May
8 Jun
2 wk after
11 Jun
4 wk after
China aster
Callistephus chinensis
4 – 18 Apr
7 May
6-8 wk
30 May
18 Jun
2 wk after
29 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
22 Mar – 5 Apr
13 Apr
6-8 wk
17 May
25 May
0 wk
30 May
2 wk after
Hollyhock
Alcea rosea
22 Mar – 5 Apr
6-8 wk
17 May
0 wk
30 May
2 wk after
Alpine delphinium
Delphinium elatum
22 Feb – 22 Mar
13 Apr
8-12 wk
17 May
8 Jun
0 wk
11 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
22 Mar – 5 Apr
13 Apr
6-8 wk
17 May
25 May
0 wk
Black-eyed Susan
Rudbeckia hirta
24 Mar – 7 Apr
27 Apr
6-8 wk
19 May
8 Jun
0 wk
29 Jun
6 wk after
Wood sage
Salvia nemorosa
8 – 22 Mar
3 Apr
8-10 wk
17 May
29 May
0 wk
11 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
14 Mar – 11 Apr
6-10 wk
23 May
1 wk after
California goldenpoppy
Eschscholzia californica
17 May
1 Jul
0 wk
18 May
21 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
14 – 28 Mar
20 Apr
8-10 wk
23 May
15 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
22 Mar – 5 Apr
1 May
6-8 wk
17 May
12 Jun
0 wk
30 May
2 Jun
2 wk after