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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 110 days 15 May – 2 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
14 Jun
5-7 wk
15 May
19 Jul
0 wk
19 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
26 Jun
4-6 wk
15 May
24 Jul
0 wk
19 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
22 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
9 Jun
5-7 wk
15 May
14 Jul
0 wk
15 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
30 Apr – 7 May
16 May
3-4 wk
28 May
6 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
23 – 30 Apr
28 May
4-5 wk
28 May
25 Jun
2 wk after
19 Jun
5 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)
20 Feb – 20 Mar
14 Mar
8-12 wk
15 May
0 wk
5 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
29 May
1 wk after
19 May
19 May
1 wk after
Maize
Zea mays
Fleece
23 – 30 Apr
6 May
3-4 wk
21 May
27 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
24 Jun
3-4 wk
17 May
15 Jul
0 wk
5 Jun
5 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
4 Jul
0 wk
15 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
9 Jun
5-7 wk
15 May
14 Jul
0 wk
15 May
4 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
13 May
4-6 wk
31 May
10 Jun
2 wk after
31 May
31 May
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
19 Jun
5-7 wk
15 May
24 Jul
0 wk
19 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
30 Apr – 7 May
5 Jun
3-4 wk
28 May
26 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
17 May
3-4 wk
17 May
7 Jun
0 wk
5 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
21 Jun
4-6 wk
15 May
19 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
8 Jul
3-4 wk
15 May
29 Jul
0 wk
19 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
21 Jun
4-6 wk
15 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
21 May
2-4 wk
15 May
4 Jun
0 wk
15 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
29 May
1 wk after
19 May
19 May
1 wk after
Spinach
Spinacia oleracea
17 – 24 Apr
23 Jul
3-4 wk
15 May
13 Aug
0 wk
11 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
26 Mar – 9 Apr
15 Apr
6-8 wk
21 May
27 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 Apr – 14 May
23 May
2-4 wk
28 May
6 Jun
2 wk after
3 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
21 Jun
4-6 wk
15 May
19 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
23 Jun
3-4 wk
15 May
14 Jul
0 wk
19 May
4 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
16 – 30 Apr
14 May
4-6 wk
28 May
11 Jun
2 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
19 May
8-10 wk
15 May
14 Jul
0 wk
19 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
19 May
15 Jul
1 wk after
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
2 Jun
6-8 wk
15 May
14 Jul
0 wk
19 May
4 Jul
1 wk after
Spearmint
Mentha spicata
20 Feb – 20 Mar
19 May
8-12 wk
15 May
14 Jul
0 wk
19 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
15 May
4 Aug
0 wk
5 Jun
25 Jul
3 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
4 May
8-10 wk
17 May
29 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
9 May
8-10 wk
15 May
4 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
23 May
6-8 wk
15 May
4 Jul
0 wk
19 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
23 May
6-8 wk
15 May
4 Jul
0 wk
19 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
23 Mar
10-14 wk
17 May
1 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
Fleece
30 Apr – 7 May
21 May
3-4 wk
28 May
11 Jun
2 wk after
Cornflower
Centaurea cyanus
15 May
14 Jul
0 wk
19 May
4 Jul
1 wk after
Statice
Limonium sinuatum
19 Mar – 2 Apr
16 Apr
8-10 wk
28 May
11 Jun
2 wk after
Sweet William
Dianthus barbatus
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
31 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 Apr
30 Apr
6-8 wk
28 May
11 Jun
2 wk after
28 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
6 May
6-8 wk
26 May
17 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
24 Apr – 22 May
20 May
4-8 wk
19 Jun
5 wk after
19 Jun
5 wk after
Foxglove
Digitalis purpurea
6 – 20 Mar
8-10 wk
15 May
0 wk
5 Jun
3 wk after
Busy lizzie
Impatiens walleriana
24 Mar – 21 Apr
1 Jun
8-12 wk
16 Jun
27 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 Apr
10 May
6-8 wk
28 May
21 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
10 Apr
8-10 wk
17 May
5 Jun
0 wk
Love in a mist
Nigella damascena
15 May
29 Jun
0 wk
19 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
26 Mar – 9 Apr
28 Apr
6-8 wk
21 May
9 Jun
1 wk after
13 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
22 Feb – 22 Mar
10 Apr
8-12 wk
17 May
5 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
26 Feb – 26 Mar
20 Mar
8-12 wk
21 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
26 Feb – 26 Mar
22 Apr
8-12 wk
21 May
17 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
26 Mar – 9 Apr
6 May
6-8 wk
21 May
17 Jun
1 wk after
Corn poppy
Papaver rhoeas
15 May
14 Jul
0 wk
19 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
20 Feb – 20 Mar
9 May
8-12 wk
15 May
4 Jul
0 wk
31 May
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
19 Mar – 2 Apr
4 May
8-10 wk
28 May
29 Jun
2 wk after
Sweet pea
Lathyrus odoratus
20 Mar – 10 Apr
30 May
5-8 wk
15 May
4 Jul
0 wk
Stock
Matthiola incana
20 Mar – 3 Apr
2 Jun
6-8 wk
15 May
14 Jul
0 wk
5 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
20 Mar – 3 Apr
3 May
6-8 wk
15 May
14 Jun
0 wk
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
9 – 23 Apr
15 May
4-6 wk
21 May
12 Jun
1 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
19 May
8-10 wk
15 May
14 Jul
0 wk
31 May
4 Jul
2 wk after
Petunia
Petunia
5 Mar – 2 Apr
16 Apr
8-12 wk
28 May
11 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
22 Mar – 5 Apr
24 Apr
6-8 wk
17 May
5 Jun
0 wk
3 Jul
7 wk after
Common zinnia
Zinnia elegans
16 – 30 Apr
14 May
4-6 wk
28 May
11 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
23 Apr – 7 May
21 May
3-5 wk
28 May
11 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 Apr
20 May
4-6 wk
28 May
17 Jun
2 wk after
3 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
5 Mar – 2 Apr
22 May
8-12 wk
28 May
17 Jul
2 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
19 Apr
8-12 wk
15 May
14 Jun
0 wk
19 Jun
5 wk after
Yarrow
Achillea millefolium
20 Mar – 3 Apr
3 Apr
6-8 wk
15 May
15 May
0 wk
5 Jun
3 wk after
Safflower
Carthamus tinctorius
15 May
14 Jun
0 wk
19 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
20 Mar – 3 Apr
23 May
6-8 wk
15 May
4 Jul
0 wk
27 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
3 – 17 Apr
6 Jun
4-6 wk
15 May
4 Jul
0 wk
5 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
26 Feb – 12 Mar
26 Mar
10-12 wk
21 May
4 Jun
1 wk after
Sunflower
Helianthus annuus
30 Apr – 7 May
31 May
3-4 wk
28 May
21 Jun
2 wk after
19 Jun
5 wk after
China aster
Callistephus chinensis
2 – 16 Apr
20 May
6-8 wk
28 May
1 Jul
2 wk after
3 Jul
7 wk after
Annual phlox
Phlox drummondii
26 Mar – 9 Apr
10 May
6-8 wk
21 May
21 Jun
1 wk after
3 Jul
7 wk after
Hollyhock
Alcea rosea
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
5 Jun
3 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
19 Apr
8-12 wk
15 May
14 Jun
0 wk
19 Jun
5 wk after
African marigold
Tagetes erecta
2 – 16 Apr
10 May
6-8 wk
28 May
21 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
22 Mar – 5 Apr
10 May
6-8 wk
17 May
21 Jun
0 wk
3 Jul
7 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
9 Apr
8-10 wk
15 May
4 Jun
0 wk
19 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
19 Mar – 16 Apr
30 Apr
6-10 wk
28 May
11 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
15 May
7 Jul
0 wk
19 May
27 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
19 Mar – 2 Apr
15 Apr
8-10 wk
28 May
10 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
20 Mar – 3 Apr
3 May
6-8 wk
15 May
14 Jun
0 wk
5 Jun
3 wk after