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Method
Rel. frost
Last spring frost (0°C) 16 May Frost 9 of 10 years · 20 years of data
Frost-free season 100 days 16 May – 24 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)
28 Mar – 11 Apr
12 Jun
5-7 wk
16 May
17 Jul
0 wk
17 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Apr
24 Jun
4-6 wk
16 May
22 Jul
0 wk
17 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
24 Apr – 1 May
15 May
4-5 wk
29 May
12 Jun
2 wk after
10 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
27 May – 3 Jun
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Feb – 21 Mar
8 Mar
8-12 wk
16 May
0 wk
29 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 May
23 May
0 wk
17 May
0 wk
Maize
Zea mays
Season too short
18 – 25 Apr
3-4 wk
16 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
11 Jun
3-4 wk
18 May
2 Jul
0 wk
29 May
22 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
16 May
21 Jun
0 wk
16 May
11 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Mar – 11 Apr
7 Jun
5-7 wk
16 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Potato
Solanum tuberosum
14 – 28 Apr
23 Apr
4-6 wk
26 May
1 wk after
26 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Mar – 11 Apr
6 Jun
5-7 wk
16 May
11 Jul
0 wk
17 May
1 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
4 May
3-4 wk
18 May
25 May
0 wk
29 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Apr
25 Jun
3-4 wk
16 May
16 Jul
0 wk
17 May
6 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Apr – 2 May
11 May
2-4 wk
16 May
25 May
0 wk
16 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 May
23 May
0 wk
17 May
0 wk
Spinach
Spinacia oleracea
18 – 25 Apr
18 Jul
3-4 wk
16 May
8 Aug
0 wk
13 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
10 – 24 Jun
4-6 wk
22 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
18 Apr – 2 May
2-4 wk
16 May
0 wk
29 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Apr
19 Jun
4-6 wk
16 May
17 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Apr
10 Jun
3-4 wk
16 May
1 Jul
0 wk
17 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
10 – 24 Apr
4-6 wk
22 May
1 wk after
Lemon balm
Melissa officinalis
7 – 21 Mar
6 May
8-10 wk
16 May
1 Jul
0 wk
10 Jun
21 Jun
4 wk after
Dill
Anethum graveolens
17 May
2 Jul
0 wk
Wild chives
Allium schoenoprasum
21 Mar – 4 Apr
31 May
6-8 wk
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Spearmint
Mentha spicata
21 Feb – 21 Mar
17 May
8-12 wk
16 May
12 Jul
0 wk
10 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
16 May
22 Jul
0 wk
29 May
12 Jul
2 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
2 May
8-10 wk
18 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
7 – 21 Mar
7 May
8-10 wk
16 May
2 Jul
0 wk
Oregano
Origanum vulgare
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
10 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
17 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
11 Mar
10-14 wk
18 May
20 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
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Cornflower
Centaurea cyanus
16 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Statice
Limonium sinuatum
Season too short
7 – 21 Mar
20 Mar
8-10 wk
16 May
0 wk
Sweet William
Dianthus barbatus
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
26 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
21 Mar – 4 Apr
3 Apr
6-8 wk
16 May
0 wk
17 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
21 Mar – 4 Apr
6 Apr
6-8 wk
16 May
18 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
27 Mar – 24 Apr
20 Apr
4-8 wk
22 May
1 wk after
22 May
1 wk after
Foxglove
Digitalis purpurea
7 – 21 Mar
8-10 wk
16 May
0 wk
29 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
27 Feb – 27 Mar
10 May
8-12 wk
22 May
5 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
21 Mar – 4 Apr
13 Apr
6-8 wk
16 May
25 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
2 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
28 Mar
8-10 wk
18 May
23 May
0 wk
Love in a mist
Nigella damascena
16 May
16 Jun
0 wk
17 May
6 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
21 Mar – 4 Apr
24 Mar
6-8 wk
16 May
0 wk
17 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
28 Mar
8-12 wk
18 May
23 May
0 wk
Cardoon
Cynara cardunculus
Season too short
21 Feb – 21 Mar
15 Mar
8-12 wk
16 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
Corn poppy
Papaver rhoeas
16 May
1 Jul
0 wk
17 May
21 Jun
0 wk
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
26 Apr
8-12 wk
16 May
21 Jun
0 wk
26 May
11 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
13 – 27 Mar
30 Mar
8-10 wk
22 May
25 May
1 wk after
Sweet pea
Lathyrus odoratus
21 Mar – 11 Apr
28 May
5-8 wk
16 May
2 Jul
0 wk
Stock
Matthiola incana
21 Mar – 4 Apr
20 May
6-8 wk
16 May
1 Jul
0 wk
29 May
21 Jun
2 wk after
Wormwood
Artemisia absinthium
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
10 – 24 Apr
4-6 wk
22 May
1 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Mar
17 May
8-10 wk
16 May
12 Jul
0 wk
26 May
2 Jul
1 wk after
Petunia
Petunia
Season too short
21 Feb – 21 Mar
20 Mar
8-12 wk
16 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
11 Apr
6-8 wk
18 May
23 May
0 wk
28 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
4 – 18 Apr
22 Apr
4-6 wk
16 May
20 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
17 Apr – 1 May
3-5 wk
22 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
4 – 18 Apr
20 Apr
4-6 wk
16 May
18 May
0 wk
29 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
2 wk after
Bee balm
Monarda didyma
21 Feb – 21 Mar
6 Apr
8-12 wk
16 May
1 Jun
0 wk
10 Jun
4 wk after
Yarrow
Achillea millefolium
21 Mar – 4 Apr
1 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Safflower
Carthamus tinctorius
16 May
9 Jun
0 wk
17 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
0 wk
30 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
4 – 18 Apr
24 May
4-6 wk
16 May
21 Jun
0 wk
29 May
11 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
27 Feb – 13 Mar
10-12 wk
22 May
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
19 May
3-4 wk
29 May
9 Jun
2 wk after
10 Jun
4 wk after
China aster
Callistephus chinensis
3 – 17 Apr
8 May
6-8 wk
29 May
19 Jun
2 wk after
28 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
21 Mar – 4 Apr
13 Apr
6-8 wk
16 May
25 May
0 wk
29 May
2 wk after
Hollyhock
Alcea rosea
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Alpine delphinium
Delphinium elatum
21 Feb – 21 Mar
6 Apr
8-12 wk
16 May
1 Jun
0 wk
10 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
21 Mar – 4 Apr
13 Apr
6-8 wk
16 May
25 May
0 wk
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
28 Apr
6-8 wk
18 May
9 Jun
0 wk
28 Jun
6 wk after
Wood sage
Salvia nemorosa
7 – 21 Mar
27 Mar
8-10 wk
16 May
22 May
0 wk
10 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
13 Mar – 10 Apr
6-10 wk
22 May
1 wk after
California goldenpoppy
Eschscholzia californica
16 May
26 Jun
0 wk
17 May
16 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
13 – 27 Mar
17 Apr
8-10 wk
22 May
12 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
0 wk
29 May
2 Jun
2 wk after