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Method
Rel. frost
Last spring frost (0°C) 15 May Frost 3 of 4 years · 20 years of data
Frost-free season 109 days 15 May – 1 Sep
Probability that frost is over

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