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Rel. frost
Last spring frost (0°C) 18 May Frost 9 of 10 years · 20 years of data
Frost-free season 107 days 18 May – 2 Sep
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)
30 Mar – 13 Apr
15 Jun
5-7 wk
18 May
20 Jul
0 wk
22 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
27 Jun
4-6 wk
18 May
25 Jul
0 wk
22 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
10 Jun
5-7 wk
18 May
15 Jul
0 wk
18 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
26 Apr – 3 May
25 May
4-5 wk
31 May
22 Jun
2 wk after
22 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
13 Mar
8-12 wk
18 May
0 wk
8 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
28 May
1 wk after
22 May
1 wk after
Maize
Zea mays
Season too short
20 – 27 Apr
3-4 wk
18 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
21 Jun
3-4 wk
20 May
12 Jul
0 wk
8 Jun
2 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
5 Jul
0 wk
18 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
10 Jun
5-7 wk
18 May
15 Jul
0 wk
18 May
5 Jul
0 wk
Potato
Solanum tuberosum
22 Apr – 6 May
13 May
4-6 wk
3 Jun
10 Jun
2 wk after
3 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
20 Jun
5-7 wk
18 May
25 Jul
0 wk
22 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
18 May
3-4 wk
20 May
8 Jun
0 wk
8 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
22 Jun
4-6 wk
18 May
20 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
9 Jul
3-4 wk
18 May
30 Jul
0 wk
22 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
22 Jun
4-6 wk
18 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
19 May
2-4 wk
18 May
2 Jun
0 wk
18 May
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
28 May
1 wk after
22 May
1 wk after
Spinach
Spinacia oleracea
20 – 27 Apr
24 Jul
3-4 wk
18 May
14 Aug
0 wk
14 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
19 Jun – 3 Jul
4-6 wk
31 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
20 Apr – 4 May
2-4 wk
18 May
0 wk
8 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
22 Jun
4-6 wk
18 May
20 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
24 Jun
3-4 wk
18 May
15 Jul
0 wk
22 May
5 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
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
20 May
8-10 wk
18 May
15 Jul
0 wk
22 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
22 May
12 Jul
1 wk after
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
3 Jun
6-8 wk
18 May
15 Jul
0 wk
22 May
5 Jul
1 wk after
Spearmint
Mentha spicata
23 Feb – 23 Mar
20 May
8-12 wk
18 May
15 Jul
0 wk
22 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
18 May
1 Aug
0 wk
8 Jun
22 Jul
3 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
5 May
8-10 wk
20 May
30 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
10 May
8-10 wk
18 May
5 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
24 May
6-8 wk
18 May
5 Jul
0 wk
22 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
24 May
6-8 wk
18 May
5 Jul
0 wk
22 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
21 Mar
10-14 wk
20 May
30 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
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Cornflower
Centaurea cyanus
18 May
15 Jul
0 wk
22 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Greenhouse
9 – 23 Mar
29 Mar
8-10 wk
18 May
24 May
0 wk
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
3 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
23 Mar – 6 Apr
12 Apr
6-8 wk
18 May
24 May
0 wk
28 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
25 Mar – 8 Apr
2 Apr
6-8 wk
20 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
13 Apr – 11 May
16 Apr
4-8 wk
8 Jun
3 wk after
8 Jun
3 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
8 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
1 – 29 Mar
14 May
8-12 wk
24 May
9 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
23 Mar – 6 Apr
22 Apr
6-8 wk
18 May
3 Jun
0 wk
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
4-6 wk
31 May
2 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Mar
7 Apr
8-10 wk
20 May
2 Jun
0 wk
Love in a mist
Nigella damascena
18 May
30 Jun
0 wk
22 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Greenhouse
23 Mar – 6 Apr
2 Apr
6-8 wk
18 May
0 wk
28 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
7 Apr
8-12 wk
20 May
2 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
23 Feb – 23 Mar
21 Mar
8-12 wk
18 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
29 Mar – 12 Apr
6-8 wk
24 May
1 wk after
Corn poppy
Papaver rhoeas
18 May
15 Jul
0 wk
22 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
10 May
8-12 wk
18 May
5 Jul
0 wk
3 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
15 – 29 Mar
8 Apr
8-10 wk
24 May
3 Jun
1 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
31 May
5-8 wk
18 May
5 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
3 Jun
6-8 wk
18 May
15 Jul
0 wk
8 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
4 May
6-8 wk
18 May
15 Jun
0 wk
8 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
20 May
8-10 wk
18 May
15 Jul
0 wk
3 Jun
5 Jul
2 wk after
Petunia
Petunia
Greenhouse
23 Feb – 23 Mar
29 Mar
8-12 wk
18 May
24 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
21 Apr
6-8 wk
20 May
2 Jun
0 wk
6 Jul
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
6 – 20 Apr
26 Apr
4-6 wk
18 May
24 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
19 Apr – 3 May
3-5 wk
24 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
6 – 20 Apr
29 Apr
4-6 wk
18 May
27 May
0 wk
8 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
8 Mar – 5 Apr
8-12 wk
31 May
2 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
20 Apr
8-12 wk
18 May
15 Jun
0 wk
22 Jun
5 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
4 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Safflower
Carthamus tinctorius
18 May
15 Jun
0 wk
22 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
24 May
6-8 wk
18 May
5 Jul
0 wk
30 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
7 Jun
4-6 wk
18 May
5 Jul
0 wk
8 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
1 – 15 Mar
10-12 wk
24 May
1 wk after
Sunflower
Helianthus annuus
3 – 10 May
29 May
3-4 wk
31 May
19 Jun
2 wk after
22 Jun
5 wk after
China aster
Callistephus chinensis
5 – 19 Apr
18 May
6-8 wk
31 May
29 Jun
2 wk after
6 Jul
7 wk after
Annual phlox
Phlox drummondii
Greenhouse
23 Mar – 6 Apr
22 Apr
6-8 wk
18 May
3 Jun
0 wk
8 Jun
3 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
20 Apr
8-12 wk
18 May
15 Jun
0 wk
22 Jun
5 wk after
African marigold
Tagetes erecta
Greenhouse
23 Mar – 6 Apr
22 Apr
6-8 wk
18 May
3 Jun
0 wk
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
8 May
6-8 wk
20 May
19 Jun
0 wk
6 Jul
7 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
10 Apr
8-10 wk
18 May
5 Jun
0 wk
22 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
15 Mar – 12 Apr
6-10 wk
24 May
1 wk after
California goldenpoppy
Eschscholzia californica
18 May
5 Jul
0 wk
22 May
25 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
11 Apr
8-10 wk
31 May
6 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
4 May
6-8 wk
18 May
15 Jun
0 wk
8 Jun
3 wk after