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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 3 of 4 years · 20 years of data
Frost-free season 101 days 21 May – 30 Aug
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)
2 – 16 Apr
15 Jun
5-7 wk
21 May
20 Jul
0 wk
25 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
27 Jun
4-6 wk
21 May
25 Jul
0 wk
25 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
21 Mar
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
10 Jun
5-7 wk
21 May
15 Jul
0 wk
21 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
6 – 13 May
15 May
3-4 wk
3 Jun
5 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
26 May
4-5 wk
3 Jun
23 Jun
2 wk after
25 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Feb – 26 Mar
14 Mar
8-12 wk
21 May
0 wk
11 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
25 May
29 May
1 wk after
25 May
1 wk after
Maize
Zea mays
Fleece
29 Apr – 6 May
5 May
3-4 wk
27 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
22 Jun
3-4 wk
23 May
13 Jul
0 wk
11 Jun
3 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
29 Jun
0 wk
21 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
10 Jun
5-7 wk
21 May
15 Jul
0 wk
21 May
5 Jul
0 wk
Potato
Solanum tuberosum
25 Apr – 9 May
14 May
4-6 wk
6 Jun
11 Jun
2 wk after
6 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
14 Jun
5-7 wk
21 May
19 Jul
0 wk
25 May
9 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
6 – 13 May
6 Jun
3-4 wk
3 Jun
27 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
16 May
3-4 wk
23 May
6 Jun
0 wk
11 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
22 Jun
4-6 wk
21 May
20 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
3 Jul
3-4 wk
21 May
24 Jul
0 wk
25 May
14 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
22 Jun
4-6 wk
21 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
22 May
2-4 wk
21 May
5 Jun
0 wk
21 May
26 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
25 May
29 May
1 wk after
25 May
1 wk after
Spinach
Spinacia oleracea
23 – 30 Apr
24 Jul
3-4 wk
21 May
14 Aug
0 wk
17 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
22 Jun – 6 Jul
4-6 wk
3 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
1 – 15 Apr
14 Apr
6-8 wk
27 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
6 – 20 May
22 May
2-4 wk
3 Jun
5 Jun
2 wk after
9 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
22 Jun
4-6 wk
21 May
20 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
18 Jun
3-4 wk
21 May
9 Jul
0 wk
25 May
29 Jun
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
22 Apr – 6 May
15 May
4-6 wk
3 Jun
12 Jun
2 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
14 May
8-10 wk
21 May
9 Jul
0 wk
25 Jun
29 Jun
5 wk after
Dill
Anethum graveolens
25 May
13 Jul
1 wk after
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
3 Jun
6-8 wk
21 May
15 Jul
0 wk
25 May
5 Jul
1 wk after
Spearmint
Mentha spicata
26 Feb – 26 Mar
20 May
8-12 wk
21 May
15 Jul
0 wk
25 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
21 May
2 Aug
0 wk
11 Jun
23 Jul
3 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
5 May
8-10 wk
23 May
30 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
10 May
8-10 wk
21 May
5 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
24 May
6-8 wk
21 May
5 Jul
0 wk
25 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
24 May
6-8 wk
21 May
5 Jul
0 wk
25 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
13 Mar
10-14 wk
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
Fleece
6 – 13 May
22 May
3-4 wk
3 Jun
12 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
15 Jul
0 wk
25 May
5 Jul
1 wk after
Statice
Limonium sinuatum
25 Mar – 8 Apr
17 Apr
8-10 wk
3 Jun
12 Jun
2 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
6 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
8 – 22 Apr
1 May
6-8 wk
3 Jun
12 Jun
2 wk after
3 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
5 May
6-8 wk
1 Jun
16 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
30 Apr – 28 May
19 May
4-8 wk
25 Jun
5 wk after
25 Jun
5 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
11 Jun
3 wk after
Busy lizzie
Impatiens walleriana
30 Mar – 27 Apr
2 Jun
8-12 wk
22 Jun
28 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
8 Apr
8-10 wk
23 May
3 Jun
0 wk
Love in a mist
Nigella damascena
21 May
24 Jun
0 wk
25 May
14 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
29 Apr
6-8 wk
27 May
10 Jun
1 wk after
19 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
8 Apr
8-12 wk
23 May
3 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
26 Feb – 26 Mar
21 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
4 Mar – 1 Apr
21 Apr
8-12 wk
27 May
16 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
1 – 15 Apr
5 May
6-8 wk
27 May
16 Jun
1 wk after
Corn poppy
Papaver rhoeas
21 May
9 Jul
0 wk
25 May
29 Jun
1 wk after
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
4 May
8-12 wk
21 May
29 Jun
0 wk
6 Jun
19 Jun
2 wk after
Flossflower
Ageratum houstonianum
13 – 27 Apr
27 Apr
8-10 wk
22 Jun
22 Jun
5 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
31 May
5-8 wk
21 May
5 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
0 wk
11 Jun
29 Jun
3 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
4 May
6-8 wk
21 May
15 Jun
0 wk
11 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
15 – 29 Apr
14 May
4-6 wk
27 May
11 Jun
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
20 May
8-10 wk
21 May
15 Jul
0 wk
6 Jun
5 Jul
2 wk after
Petunia
Petunia
11 Mar – 8 Apr
17 Apr
8-12 wk
3 Jun
12 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
22 Apr
6-8 wk
23 May
3 Jun
0 wk
9 Jul
7 wk after
Common zinnia
Zinnia elegans
22 Apr – 6 May
15 May
4-6 wk
3 Jun
12 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
29 Apr – 13 May
22 May
3-5 wk
3 Jun
12 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
22 Apr – 6 May
19 May
4-6 wk
3 Jun
16 Jun
2 wk after
9 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
7 May
8-12 wk
22 Jun
2 Jul
5 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
25 Jun
5 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
4 Apr
6-8 wk
21 May
0 wk
11 Jun
3 wk after
Safflower
Carthamus tinctorius
21 May
15 Jun
0 wk
25 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
24 May
6-8 wk
21 May
5 Jul
0 wk
3 May
25 Jun
3 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
1 Jun
4-6 wk
21 May
29 Jun
0 wk
11 Jun
19 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
4 – 18 Mar
26 Mar
10-12 wk
27 May
4 Jun
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
21 May
3-4 wk
3 Jun
11 Jun
2 wk after
25 Jun
5 wk after
China aster
Callistephus chinensis
8 – 22 Apr
10 May
6-8 wk
3 Jun
21 Jun
2 wk after
9 Jul
7 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
11 May
6-8 wk
27 May
22 Jun
1 wk after
9 Jul
7 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
11 Jun
3 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
25 Jun
5 wk after
African marigold
Tagetes erecta
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
30 Apr
6-8 wk
23 May
11 Jun
0 wk
9 Jul
7 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
4 Apr
8-10 wk
21 May
30 May
0 wk
25 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
25 Mar – 22 Apr
1 May
6-10 wk
3 Jun
12 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
8 Jul
0 wk
25 May
28 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
28 Apr
8-10 wk
27 May
23 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
4 May
6-8 wk
21 May
15 Jun
0 wk
11 Jun
3 wk after