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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 111 days 18 May – 6 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
11 Jun
5-7 wk
18 May
16 Jul
0 wk
19 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
23 Jun
4-6 wk
18 May
21 Jul
0 wk
19 May
11 Jul
0 wk
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
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 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
24 May
4-5 wk
31 May
21 Jun
2 wk after
12 Jun
4 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)
Greenhouse
23 Feb – 23 Mar
9 Mar
8-12 wk
18 May
0 wk
18 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Greenhouse
9 May
24 May
1 wk before
9 May
14 May
1 wk before
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
20 Jun
3-4 wk
20 May
11 Jul
0 wk
31 May
1 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
1 Jul
0 wk
18 May
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
6 Jun
5-7 wk
18 May
11 Jul
0 wk
18 May
1 Jul
0 wk
Potato
Solanum tuberosum
Greenhouse
3 – 17 Apr
28 Apr
4-6 wk
15 May
26 May
0 wk
15 May
16 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
16 Jun
5-7 wk
18 May
21 Jul
0 wk
19 May
11 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
20 – 27 Apr
3 May
3-4 wk
18 May
24 May
0 wk
24 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
5 Jul
3-4 wk
18 May
26 Jul
0 wk
19 May
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Fleece
14 – 28 Apr
4 May
2-4 wk
12 May
18 May
1 wk before
12 May
1 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Greenhouse
9 May
24 May
1 wk before
9 May
14 May
1 wk before
Spinach
Spinacia oleracea
20 – 27 Apr
20 Jul
3-4 wk
18 May
10 Aug
0 wk
15 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
12 – 26 Jun
4-6 wk
24 Jul
10 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
31 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
18 Jun
4-6 wk
18 May
16 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
20 Jun
3-4 wk
18 May
11 Jul
0 wk
19 May
1 Jul
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
12 – 26 Apr
4-6 wk
24 May
1 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
16 May
8-10 wk
18 May
11 Jul
0 wk
12 Jun
1 Jul
4 wk after
Dill
Anethum graveolens
19 May
11 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
30 May
6-8 wk
18 May
11 Jul
0 wk
19 May
1 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
16 May
8-12 wk
18 May
11 Jul
0 wk
12 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
18 May
31 Jul
0 wk
31 May
21 Jul
2 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
1 May
8-10 wk
20 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
6 May
8-10 wk
18 May
1 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
12 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
19 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
22 Mar
10-14 wk
20 May
31 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
11 Jul
0 wk
19 May
1 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
9 – 23 Mar
30 Mar
8-10 wk
18 May
25 May
0 wk
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
28 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
23 Mar – 6 Apr
13 Apr
6-8 wk
18 May
25 May
0 wk
19 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
23 Mar – 6 Apr
19 Apr
6-8 wk
18 May
31 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
29 Mar – 26 Apr
3 May
4-8 wk
24 May
31 May
1 wk after
24 May
1 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
31 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
1 – 29 Mar
20 May
8-12 wk
24 May
15 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
23 Mar – 6 Apr
23 Apr
6-8 wk
18 May
4 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
6 Apr
8-10 wk
20 May
1 Jun
0 wk
Love in a mist
Nigella damascena
18 May
26 Jun
0 wk
19 May
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
23 Mar – 6 Apr
3 Apr
6-8 wk
18 May
0 wk
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
6 Apr
8-12 wk
20 May
1 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
23 Feb – 23 Mar
17 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
11 Jul
0 wk
19 May
1 Jul
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
6 May
8-12 wk
18 May
1 Jul
0 wk
28 May
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
15 – 29 Mar
9 Apr
8-10 wk
24 May
4 Jun
1 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
27 May
5-8 wk
18 May
1 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
30 May
6-8 wk
18 May
11 Jul
0 wk
31 May
1 Jul
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 Jun
2 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
16 May
8-10 wk
18 May
11 Jul
0 wk
28 May
1 Jul
1 wk after
Petunia
Petunia
Greenhouse
23 Feb – 23 Mar
30 Mar
8-12 wk
18 May
25 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
20 Apr
6-8 wk
20 May
1 Jun
0 wk
30 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
6 – 20 Apr
2 May
4-6 wk
18 May
30 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
3 May
4-6 wk
18 May
31 May
0 wk
31 May
2 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
16 Apr
8-12 wk
18 May
11 Jun
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
31 Mar
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
11 Jun
0 wk
19 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
0 wk
2 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
3 Jun
4-6 wk
18 May
1 Jul
0 wk
31 May
21 Jun
2 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
30 May
3-4 wk
31 May
20 Jun
2 wk after
12 Jun
4 wk after
China aster
Callistephus chinensis
5 – 19 Apr
19 May
6-8 wk
31 May
30 Jun
2 wk after
30 Jun
6 wk after
Annual phlox
Phlox drummondii
Fleece
23 Mar – 6 Apr
10 Apr
6-8 wk
18 May
22 May
0 wk
12 Jun
4 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
16 Apr
8-12 wk
18 May
11 Jun
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
23 Mar – 6 Apr
23 Apr
6-8 wk
18 May
4 Jun
0 wk
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
9 May
6-8 wk
20 May
20 Jun
0 wk
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
6 Apr
8-10 wk
18 May
1 Jun
0 wk
12 Jun
4 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
2 Jul
0 wk
19 May
22 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
15 – 29 Mar
26 Apr
8-10 wk
24 May
21 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
30 Apr
6-8 wk
18 May
11 Jun
0 wk
31 May
1 Jun
2 wk after