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Method
Rel. frost
Last spring frost (0°C) 9 May Frost 9 of 10 years · 20 years of data
Frost-free season 120 days 9 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)
21 Mar – 4 Apr
12 Jun
5-7 wk
9 May
17 Jul
0 wk
10 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
28 Mar – 11 Apr
24 Jun
4-6 wk
9 May
22 Jul
0 wk
10 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
24 Feb – 24 Mar
8-12 wk
19 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
21 Mar – 4 Apr
7 Jun
5-7 wk
9 May
12 Jul
0 wk
9 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
21 – 28 Apr
3-4 wk
19 May
1 wk after
Florence Fennel
Foeniculum vulgare
10 – 17 May
15 May
4-5 wk
14 Jun
5 wk after
21 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
22 – 29 May
3-4 wk
19 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
14 Feb – 14 Mar
15 Mar
8-12 wk
9 May
10 May
0 wk
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
10 May
30 May
0 wk
10 May
20 May
0 wk
Maize
Zea mays
Season too short
13 – 20 Apr
3-4 wk
11 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 Apr
18 Jun
3-4 wk
14 May
9 Jul
1 wk after
22 May
29 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
9 May
1 Jul
0 wk
9 May
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
21 Mar – 4 Apr
7 Jun
5-7 wk
9 May
12 Jul
0 wk
9 May
2 Jul
0 wk
Potato
Solanum tuberosum
7 – 21 Apr
12 May
4-6 wk
19 May
9 Jun
1 wk after
19 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
21 Mar – 4 Apr
16 Jun
5-7 wk
9 May
21 Jul
0 wk
10 May
11 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
21 – 28 Apr
9 May
3-4 wk
19 May
30 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 Apr
18 May
3-4 wk
14 May
8 Jun
1 wk after
22 May
29 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
28 Mar – 11 Apr
19 Jun
4-6 wk
9 May
17 Jul
0 wk
Lettuce
Lactuca sativa
11 – 18 Apr
5 Jul
3-4 wk
9 May
26 Jul
0 wk
10 May
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
28 Mar – 11 Apr
19 Jun
4-6 wk
9 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Apr
18 May
2-4 wk
9 May
1 Jun
0 wk
9 May
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
10 May
30 May
0 wk
10 May
20 May
0 wk
Spinach
Spinacia oleracea
11 – 18 Apr
21 Jul
3-4 wk
9 May
11 Aug
0 wk
6 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
3 – 17 Jun
4-6 wk
15 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
16 – 30 Mar
6-8 wk
11 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
13 – 27 Apr
11 May
2-4 wk
11 May
25 May
0 wk
22 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
28 Mar – 11 Apr
19 Jun
4-6 wk
9 May
17 Jul
0 wk
Garden pea
Pisum sativum
11 – 18 Apr
20 Jun
3-4 wk
9 May
11 Jul
0 wk
10 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
7 – 21 Apr
17 Apr
4-6 wk
19 May
1 wk after
Lemon balm
Melissa officinalis
28 Feb – 14 Mar
16 May
8-10 wk
9 May
11 Jul
0 wk
3 Jun
1 Jul
4 wk after
Dill
Anethum graveolens
10 May
9 Jul
0 wk
Wild chives
Allium schoenoprasum
14 – 28 Mar
31 May
6-8 wk
9 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Spearmint
Mentha spicata
14 Feb – 14 Mar
17 May
8-12 wk
9 May
12 Jul
0 wk
3 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
9 May
29 Jul
0 wk
22 May
19 Jul
2 wk after
Garden sage
Salvia officinalis
5 – 19 Mar
2 May
8-10 wk
14 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
28 Feb – 14 Mar
7 May
8-10 wk
9 May
2 Jul
0 wk
Oregano
Origanum vulgare
14 – 28 Mar
21 May
6-8 wk
9 May
2 Jul
0 wk
3 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
14 – 28 Mar
21 May
6-8 wk
9 May
2 Jul
0 wk
10 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
5 Feb – 5 Mar
17 Mar
10-14 wk
14 May
26 May
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
Season too short
21 – 28 Apr
24 Apr
3-4 wk
19 May
1 wk after
Cornflower
Centaurea cyanus
9 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
2 – 16 Mar
28 Mar
8-10 wk
11 May
23 May
0 wk
Sweet William
Dianthus barbatus
14 – 28 Mar
6-8 wk
9 May
0 wk
19 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
16 – 30 Mar
11 Apr
6-8 wk
11 May
23 May
0 wk
10 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
14 – 28 Mar
19 Apr
6-8 wk
9 May
31 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
27 Mar – 24 Apr
18 Apr
4-8 wk
22 May
2 wk after
22 May
2 wk after
Foxglove
Digitalis purpurea
28 Feb – 14 Mar
8-10 wk
9 May
0 wk
22 May
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
6 Mar – 3 Apr
5 May
8-12 wk
29 May
30 Jun
3 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
24 Mar – 7 Apr
12 Apr
6-8 wk
19 May
24 May
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
3 wk after
Chinese lantern
Physalis alkekengi
5 – 19 Mar
4 Apr
8-10 wk
14 May
30 May
1 wk after
Love in a mist
Nigella damascena
9 May
26 Jun
0 wk
10 May
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
16 – 30 Mar
1 Apr
6-8 wk
11 May
13 May
0 wk
10 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
19 Feb – 19 Mar
4 Apr
8-12 wk
14 May
30 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
16 Feb – 16 Mar
18 Mar
8-12 wk
11 May
13 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
24 Feb – 24 Mar
10 Mar
8-12 wk
19 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
24 Mar – 7 Apr
24 Mar
6-8 wk
19 May
1 wk after
Corn poppy
Papaver rhoeas
9 May
11 Jul
0 wk
10 May
1 Jul
0 wk
Snapdragon
Antirrhinum majus
14 Feb – 14 Mar
6 May
8-12 wk
9 May
1 Jul
0 wk
19 May
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
10 – 24 Mar
7 Apr
8-10 wk
19 May
2 Jun
1 wk after
Sweet pea
Lathyrus odoratus
14 Mar – 4 Apr
28 May
5-8 wk
9 May
2 Jul
0 wk
Stock
Matthiola incana
14 – 28 Mar
30 May
6-8 wk
9 May
11 Jul
0 wk
22 May
1 Jul
2 wk after
Wormwood
Artemisia absinthium
14 – 28 Mar
1 May
6-8 wk
9 May
12 Jun
0 wk
22 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
7 – 21 Apr
4-6 wk
19 May
1 wk after
Garden pansy
Viola × wittrockiana
28 Feb – 14 Mar
17 May
8-10 wk
9 May
12 Jul
0 wk
19 May
2 Jul
1 wk after
Petunia
Petunia
Greenhouse
16 Feb – 16 Mar
28 Mar
8-12 wk
11 May
23 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
19 Mar – 2 Apr
18 Apr
6-8 wk
14 May
30 May
1 wk after
21 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
30 Mar – 13 Apr
28 Apr
4-6 wk
11 May
26 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
14 – 28 Apr
24 Apr
3-5 wk
19 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
30 Mar – 13 Apr
3 May
4-6 wk
11 May
31 May
0 wk
22 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
6 Mar – 3 Apr
9 Apr
8-12 wk
29 May
4 Jun
3 wk after
Bee balm
Monarda didyma
14 Feb – 14 Mar
16 Apr
8-12 wk
9 May
11 Jun
0 wk
3 Jun
4 wk after
Yarrow
Achillea millefolium
14 – 28 Mar
1 Apr
6-8 wk
9 May
13 May
0 wk
22 May
2 wk after
Safflower
Carthamus tinctorius
9 May
12 Jun
0 wk
10 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
14 – 28 Mar
21 May
6-8 wk
9 May
2 Jul
0 wk
23 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
28 Mar – 11 Apr
3 Jun
4-6 wk
9 May
1 Jul
0 wk
22 May
21 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
24 Feb – 10 Mar
10-12 wk
19 May
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
25 May
3-4 wk
29 May
15 Jun
3 wk after
3 Jun
5 Jun
4 wk after
China aster
Callistephus chinensis
3 – 17 Apr
14 May
6-8 wk
29 May
25 Jun
3 wk after
21 Jun
6 wk after
Annual phlox
Phlox drummondii
Fleece
16 – 30 Mar
12 Apr
6-8 wk
11 May
24 May
0 wk
3 Jun
4 wk after
Hollyhock
Alcea rosea
14 – 28 Mar
6-8 wk
9 May
0 wk
22 May
2 wk after
Alpine delphinium
Delphinium elatum
14 Feb – 14 Mar
16 Apr
8-12 wk
9 May
11 Jun
0 wk
3 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
24 Mar – 7 Apr
12 Apr
6-8 wk
19 May
24 May
1 wk after
Black-eyed Susan
Rudbeckia hirta
19 Mar – 2 Apr
4 May
6-8 wk
14 May
15 Jun
1 wk after
21 Jun
6 wk after
Wood sage
Salvia nemorosa
28 Feb – 14 Mar
6 Apr
8-10 wk
9 May
1 Jun
0 wk
3 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
10 Mar – 7 Apr
3 Apr
6-10 wk
19 May
1 wk after
California goldenpoppy
Eschscholzia californica
9 May
4 Jul
0 wk
10 May
24 Jun
0 wk
Painted tongue
Salpiglossis sinuata
20 Mar – 3 Apr
17 Apr
8-10 wk
29 May
12 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
14 – 28 Mar
1 May
6-8 wk
9 May
12 Jun
0 wk
22 May
2 Jun
2 wk after