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