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Rel. frost
Last spring frost (0°C) 4 May Frost 9 of 10 years · 20 years of data
Frost-free season 139 days 4 May – 20 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)
16 – 30 Mar
15 Jun
5-7 wk
4 May
20 Jul
0 wk
8 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
23 Mar – 6 Apr
27 Jun
4-6 wk
4 May
25 Jul
0 wk
8 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
24 Feb – 24 Mar
8-12 wk
19 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 – 30 Mar
10 Jun
5-7 wk
4 May
15 Jul
0 wk
4 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
21 – 28 Apr
3-4 wk
19 May
2 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 May
24 May
4-5 wk
16 Jun
21 Jun
6 wk after
22 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
24 – 31 May
3-4 wk
21 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
9 Feb – 9 Mar
22 Mar
8-12 wk
4 May
17 May
0 wk
25 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
6 Jun
1 wk after
8 May
27 May
1 wk after
Maize
Zea mays
Season too short
7 – 14 Apr
3-4 wk
5 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Apr
25 Jun
3-4 wk
12 May
16 Jul
1 wk after
25 May
6 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 May
5 Jul
0 wk
4 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 – 30 Mar
10 Jun
5-7 wk
4 May
15 Jul
0 wk
4 May
5 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
20 May
4-6 wk
20 May
17 Jun
2 wk after
20 May
7 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 – 30 Mar
20 Jun
5-7 wk
4 May
25 Jul
0 wk
8 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
21 – 28 Apr
13 May
3-4 wk
19 May
3 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Apr
31 May
3-4 wk
12 May
21 Jun
1 wk after
25 May
11 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Lettuce
Lactuca sativa
6 – 13 Apr
9 Jul
3-4 wk
4 May
30 Jul
0 wk
8 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Apr
26 May
2-4 wk
4 May
9 Jun
0 wk
4 May
30 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
6 Jun
1 wk after
8 May
27 May
1 wk after
Spinach
Spinacia oleracea
6 – 13 Apr
24 Jul
3-4 wk
4 May
14 Aug
0 wk
30 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
5 – 19 Jun
4-6 wk
17 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
10 – 24 Mar
6-8 wk
5 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
7 – 21 Apr
15 May
2-4 wk
5 May
29 May
0 wk
25 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Mar – 6 Apr
22 Jun
4-6 wk
4 May
20 Jul
0 wk
Garden pea
Pisum sativum
6 – 13 Apr
24 Jun
3-4 wk
4 May
15 Jul
0 wk
8 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
Greenhouse
7 – 21 Apr
21 Apr
4-6 wk
19 May
19 May
2 wk after
Lemon balm
Melissa officinalis
23 Feb – 9 Mar
20 May
8-10 wk
4 May
15 Jul
0 wk
8 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
8 May
16 Jul
1 wk after
Wild chives
Allium schoenoprasum
9 – 23 Mar
3 Jun
6-8 wk
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Spearmint
Mentha spicata
9 Feb – 9 Mar
20 May
8-12 wk
4 May
15 Jul
0 wk
8 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
4 May
5 Aug
0 wk
25 May
26 Jul
3 wk after
Garden sage
Salvia officinalis
3 – 17 Mar
5 May
8-10 wk
12 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
23 Feb – 9 Mar
10 May
8-10 wk
4 May
5 Jul
0 wk
Oregano
Origanum vulgare
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
8 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
8 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
3 Feb – 3 Mar
25 Mar
10-14 wk
12 May
3 Jun
1 wk after

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
21 – 28 Apr
28 Apr
3-4 wk
19 May
19 May
2 wk after
Cornflower
Centaurea cyanus
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
10 – 24 Mar
28 Mar
8-10 wk
19 May
23 May
2 wk after
Sweet William
Dianthus barbatus
9 – 23 Mar
6-8 wk
4 May
0 wk
20 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
24 Mar – 7 Apr
11 Apr
6-8 wk
19 May
23 May
2 wk after
2 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
17 – 31 Mar
16 Apr
6-8 wk
12 May
28 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
13 Apr – 11 May
4-8 wk
8 Jun
5 wk after
8 Jun
5 wk after
Foxglove
Digitalis purpurea
23 Feb – 9 Mar
8-10 wk
4 May
0 wk
25 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
8 Mar – 5 Apr
9 May
8-12 wk
31 May
4 Jul
4 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
24 Mar – 7 Apr
21 Apr
6-8 wk
19 May
2 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
4-6 wk
31 May
4 wk after
Chinese lantern
Physalis alkekengi
3 – 17 Mar
11 Apr
8-10 wk
12 May
6 Jun
1 wk after
Love in a mist
Nigella damascena
4 May
30 Jun
0 wk
8 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
24 Mar – 7 Apr
1 Apr
6-8 wk
19 May
2 wk after
2 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
17 Feb – 17 Mar
11 Apr
8-12 wk
12 May
6 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
24 Feb – 24 Mar
21 Mar
8-12 wk
19 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
24 Feb – 24 Mar
14 Mar
8-12 wk
19 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
24 Mar – 7 Apr
28 Mar
6-8 wk
19 May
2 wk after
Corn poppy
Papaver rhoeas
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
9 Feb – 9 Mar
10 May
8-12 wk
4 May
5 Jul
0 wk
20 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
22 Mar – 5 Apr
7 Apr
8-10 wk
31 May
2 Jun
4 wk after
Sweet pea
Lathyrus odoratus
9 – 30 Mar
31 May
5-8 wk
4 May
5 Jul
0 wk
Stock
Matthiola incana
9 – 23 Mar
3 Jun
6-8 wk
4 May
15 Jul
0 wk
25 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
9 – 23 Mar
4 May
6-8 wk
4 May
15 Jun
0 wk
25 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
7 – 21 Apr
4-6 wk
19 May
2 wk after
Garden pansy
Viola × wittrockiana
23 Feb – 9 Mar
20 May
8-10 wk
4 May
15 Jul
0 wk
20 May
5 Jul
2 wk after
Petunia
Petunia
Fleece
24 Feb – 24 Mar
28 Mar
8-12 wk
19 May
23 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
17 – 31 Mar
25 Apr
6-8 wk
12 May
6 Jun
1 wk after
22 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
7 – 21 Apr
21 Apr
4-6 wk
19 May
19 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
14 – 28 Apr
28 Apr
3-5 wk
19 May
19 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
7 – 21 Apr
30 Apr
4-6 wk
19 May
28 May
2 wk after
8 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
8 Mar – 5 Apr
13 Apr
8-12 wk
31 May
8 Jun
4 wk after
Bee balm
Monarda didyma
9 Feb – 9 Mar
20 Apr
8-12 wk
4 May
15 Jun
0 wk
8 Jun
5 wk after
Yarrow
Achillea millefolium
9 – 23 Mar
4 Apr
6-8 wk
4 May
16 May
0 wk
25 May
3 wk after
Safflower
Carthamus tinctorius
4 May
15 Jun
0 wk
8 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
9 – 23 Mar
24 May
6-8 wk
4 May
5 Jul
0 wk
16 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
7 Jun
4-6 wk
4 May
5 Jul
0 wk
25 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
24 Feb – 10 Mar
27 Feb
10-12 wk
19 May
2 wk after
Sunflower
Helianthus annuus
3 – 10 May
2 Jun
3-4 wk
31 May
23 Jun
4 wk after
8 Jun
13 Jun
5 wk after
China aster
Callistephus chinensis
5 – 19 Apr
22 May
6-8 wk
31 May
3 Jul
4 wk after
22 Jun
23 Jun
7 wk after
Annual phlox
Phlox drummondii
Fleece
10 – 24 Mar
21 Apr
6-8 wk
5 May
2 Jun
0 wk
8 Jun
5 wk after
Hollyhock
Alcea rosea
9 – 23 Mar
6-8 wk
4 May
0 wk
25 May
3 wk after
Alpine delphinium
Delphinium elatum
9 Feb – 9 Mar
20 Apr
8-12 wk
4 May
15 Jun
0 wk
8 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
24 Mar – 7 Apr
21 Apr
6-8 wk
19 May
2 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
17 – 31 Mar
12 May
6-8 wk
12 May
23 Jun
1 wk after
22 Jun
7 wk after
Wood sage
Salvia nemorosa
23 Feb – 9 Mar
10 Apr
8-10 wk
4 May
5 Jun
0 wk
8 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
10 Mar – 7 Apr
7 Apr
6-10 wk
19 May
19 May
2 wk after
California goldenpoppy
Eschscholzia californica
4 May
15 Jul
0 wk
8 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
26 Apr
8-10 wk
31 May
21 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Mar
4 May
6-8 wk
4 May
15 Jun
0 wk
25 May
5 Jun
3 wk after