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Method
Rel. frost
Last spring frost (0°C) 25 May Frost 1 of 10 years · 20 years of data
Frost-free season 117 days 25 May – 19 Sep
Probability that frost is over

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