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Method
Rel. frost
Last spring frost (0°C) 20 May Frost 3 of 4 years · 20 years of data
Frost-free season 108 days 20 May – 5 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)
1 – 15 Apr
10 Jun
5-7 wk
20 May
15 Jul
0 wk
21 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
22 Jun
4-6 wk
20 May
20 Jul
0 wk
21 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
3 – 31 Mar
8-12 wk
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
5 Jun
5-7 wk
20 May
10 Jul
0 wk
20 May
30 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
28 Apr – 5 May
22 May
3-4 wk
26 May
12 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
28 Apr – 5 May
25 May
4-5 wk
2 Jun
22 Jun
2 wk after
14 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
25 Feb – 25 Mar
15 Mar
8-12 wk
20 May
0 wk
20 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Greenhouse
11 May
30 May
1 wk before
11 May
20 May
1 wk before
Maize
Zea mays
Greenhouse
22 – 29 Apr
12 May
3-4 wk
20 May
2 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
21 Jun
3-4 wk
22 May
12 Jul
0 wk
2 Jun
2 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
30 Jun
0 wk
20 May
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
5 Jun
5-7 wk
20 May
10 Jul
0 wk
20 May
30 Jun
0 wk
Potato
Solanum tuberosum
Greenhouse
5 – 19 Apr
16 May
4-6 wk
17 May
13 Jun
0 wk
17 May
3 Jun
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
15 Jun
5-7 wk
20 May
20 Jul
0 wk
21 May
10 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
5 – 12 May
27 May
3-4 wk
2 Jun
17 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Apr – 1 May
28 Apr
3-4 wk
22 May
0 wk
2 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
17 Jun
4-6 wk
20 May
15 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
4 Jul
3-4 wk
20 May
25 Jul
0 wk
21 May
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
17 Jun
4-6 wk
20 May
15 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Greenhouse
6 – 20 Apr
19 May
2-4 wk
4 May
2 Jun
2 wk before
4 May
23 May
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Greenhouse
11 May
30 May
1 wk before
11 May
20 May
1 wk before
Spinach
Spinacia oleracea
22 – 29 Apr
19 Jul
3-4 wk
20 May
9 Aug
0 wk
17 May
30 Jul
0 wk
Sweet potato
Ipomoea batatas
14 – 28 Jun
4-6 wk
26 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
25 Mar – 8 Apr
21 Apr
6-8 wk
20 May
2 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
28 Apr – 12 May
29 May
2-4 wk
26 May
12 Jun
1 wk after
14 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
17 Jun
4-6 wk
20 May
15 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
19 Jun
3-4 wk
20 May
10 Jul
0 wk
21 May
30 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
14 – 28 Apr
22 May
4-6 wk
26 May
19 Jun
1 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
15 May
8-10 wk
20 May
10 Jul
0 wk
14 Jun
30 Jun
4 wk after
Dill
Anethum graveolens
21 May
12 Jul
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
29 May
6-8 wk
20 May
10 Jul
0 wk
21 May
30 Jun
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
15 May
8-12 wk
20 May
10 Jul
0 wk
14 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
20 May
1 Aug
0 wk
2 Jun
22 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
30 Apr
8-10 wk
22 May
25 Jun
0 wk
Common thyme
Thymus vulgaris
11 – 25 Mar
5 May
8-10 wk
20 May
30 Jun
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
19 May
6-8 wk
20 May
30 Jun
0 wk
14 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
19 May
6-8 wk
20 May
30 Jun
0 wk
21 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
13 Feb – 13 Mar
14 Mar
10-14 wk
22 May
23 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
28 Apr – 5 May
29 May
3-4 wk
26 May
19 Jun
1 wk after
Cornflower
Centaurea cyanus
20 May
10 Jul
0 wk
21 May
30 Jun
0 wk
Statice
Limonium sinuatum
Fleece
17 – 31 Mar
19 Apr
8-10 wk
26 May
14 Jun
1 wk after
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
31 Mar – 14 Apr
3 May
6-8 wk
26 May
14 Jun
1 wk after
9 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
5 – 19 Apr
28 Apr
6-8 wk
31 May
9 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
7 Apr – 5 May
23 May
4-8 wk
2 Jun
20 Jun
2 wk after
2 Jun
10 Jun
2 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
2 Jun
2 wk after
Busy lizzie
Impatiens walleriana
29 Mar – 26 Apr
23 May
8-12 wk
21 Jun
18 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
5 May
6-8 wk
2 Jun
16 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Mar
7 Apr
8-10 wk
22 May
2 Jun
0 wk
Love in a mist
Nigella damascena
20 May
25 Jun
0 wk
21 May
15 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
31 Mar – 14 Apr
23 Apr
6-8 wk
26 May
4 Jun
1 wk after
9 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
7 Apr
8-12 wk
22 May
2 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
25 Feb – 25 Mar
16 Mar
8-12 wk
20 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
3 – 31 Mar
14 Apr
8-12 wk
26 May
9 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
31 Mar – 14 Apr
28 Apr
6-8 wk
26 May
9 Jun
1 wk after
Corn poppy
Papaver rhoeas
20 May
10 Jul
0 wk
21 May
30 Jun
0 wk
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
5 May
8-12 wk
20 May
30 Jun
0 wk
30 May
20 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
24 Mar – 7 Apr
29 Apr
8-10 wk
2 Jun
24 Jun
2 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
26 May
5-8 wk
20 May
30 Jun
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
29 May
6-8 wk
20 May
10 Jul
0 wk
2 Jun
30 Jun
2 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
29 Apr
6-8 wk
20 May
10 Jun
0 wk
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
14 – 28 Apr
7 May
4-6 wk
26 May
4 Jun
1 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
15 May
8-10 wk
20 May
10 Jul
0 wk
30 May
30 Jun
1 wk after
Petunia
Petunia
Fleece
3 – 31 Mar
19 Apr
8-12 wk
26 May
14 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
21 Apr
6-8 wk
22 May
2 Jun
0 wk
2 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
14 – 28 Apr
22 May
4-6 wk
26 May
19 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
21 Apr – 5 May
29 May
3-5 wk
26 May
19 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
14 – 28 Apr
23 May
4-6 wk
26 May
20 Jun
1 wk after
14 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
10 Mar – 7 Apr
14 May
8-12 wk
2 Jun
9 Jul
2 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
15 Apr
8-12 wk
20 May
10 Jun
0 wk
14 Jun
4 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
30 Mar
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
10 Jun
0 wk
21 May
31 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
19 May
6-8 wk
20 May
30 Jun
0 wk
4 May
20 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
2 Jun
4-6 wk
20 May
30 Jun
0 wk
2 Jun
20 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
3 – 17 Mar
22 Mar
10-12 wk
26 May
31 May
1 wk after
Sunflower
Helianthus annuus
Fleece
28 Apr – 5 May
2 Jun
3-4 wk
26 May
23 Jun
1 wk after
2 Jun
13 Jun
2 wk after
China aster
Callistephus chinensis
7 – 21 Apr
11 May
6-8 wk
2 Jun
22 Jun
2 wk after
2 Jul
6 wk after
Annual phlox
Phlox drummondii
31 Mar – 14 Apr
5 May
6-8 wk
26 May
16 Jun
1 wk after
2 Jul
6 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
15 Apr
8-12 wk
20 May
10 Jun
0 wk
14 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Apr
5 May
6-8 wk
2 Jun
16 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
1 May
6-8 wk
22 May
12 Jun
0 wk
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
5 Apr
8-10 wk
20 May
31 May
0 wk
14 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
17 Mar – 14 Apr
8 May
6-10 wk
26 May
19 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
20 May
3 Jul
0 wk
21 May
23 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
17 – 31 Mar
27 Apr
8-10 wk
26 May
22 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
29 Apr
6-8 wk
20 May
10 Jun
0 wk
2 Jun
2 wk after