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Rel. frost
Last spring frost (0°C) 20 May Frost 9 of 10 years · 20 years of data
Frost-free season 100 days 20 May – 28 Aug
Probability that frost is over

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