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Method
Rel. frost
Last spring frost (0°C) 13 May Frost 9 of 10 years · 20 years of data
Frost-free season 107 days 13 May – 28 Aug
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)
25 Mar – 8 Apr
13 Jun
5-7 wk
13 May
18 Jul
0 wk
14 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
1 – 15 Apr
25 Jun
4-6 wk
13 May
23 Jul
0 wk
14 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
28 Feb – 28 Mar
8-12 wk
23 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
25 Mar – 8 Apr
8 Jun
5-7 wk
13 May
13 Jul
0 wk
13 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
28 Apr – 5 May
23 May
4-5 wk
2 Jun
20 Jun
3 wk after
7 Jun
10 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
18 Feb – 18 Mar
12 Mar
8-12 wk
13 May
0 wk
26 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 May
27 May
0 wk
14 May
17 May
0 wk
Maize
Zea mays
Season too short
17 – 24 Apr
3-4 wk
15 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
19 Jun
3-4 wk
18 May
10 Jul
1 wk after
26 May
30 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
13 May
24 Jun
0 wk
13 May
14 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
25 Mar – 8 Apr
8 Jun
5-7 wk
13 May
13 Jul
0 wk
13 May
3 Jul
0 wk
Potato
Solanum tuberosum
11 – 25 Apr
12 May
4-6 wk
23 May
9 Jun
1 wk after
23 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
25 Mar – 8 Apr
9 Jun
5-7 wk
13 May
14 Jul
0 wk
14 May
4 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
17 May
3-4 wk
18 May
7 Jun
1 wk after
26 May
28 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Lettuce
Lactuca sativa
15 – 22 Apr
28 Jun
3-4 wk
13 May
19 Jul
0 wk
14 May
9 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Apr
16 May
2-4 wk
13 May
30 May
0 wk
13 May
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
14 May
27 May
0 wk
14 May
17 May
0 wk
Spinach
Spinacia oleracea
15 – 22 Apr
22 Jul
3-4 wk
13 May
12 Aug
0 wk
10 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
7 – 21 Jun
4-6 wk
19 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
17 Apr – 1 May
2-4 wk
15 May
0 wk
26 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
1 – 15 Apr
20 Jun
4-6 wk
13 May
18 Jul
0 wk
Garden pea
Pisum sativum
15 – 22 Apr
13 Jun
3-4 wk
13 May
4 Jul
0 wk
14 May
24 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
11 – 25 Apr
4-6 wk
23 May
1 wk after
Lemon balm
Melissa officinalis
4 – 18 Mar
9 May
8-10 wk
13 May
4 Jul
0 wk
7 Jun
24 Jun
4 wk after
Dill
Anethum graveolens
14 May
10 Jul
0 wk
Wild chives
Allium schoenoprasum
18 Mar – 1 Apr
1 Jun
6-8 wk
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Spearmint
Mentha spicata
18 Feb – 18 Mar
18 May
8-12 wk
13 May
13 Jul
0 wk
7 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
13 May
30 Jul
0 wk
26 May
20 Jul
2 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
3 May
8-10 wk
18 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
4 – 18 Mar
8 May
8-10 wk
13 May
3 Jul
0 wk
Oregano
Origanum vulgare
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
7 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
14 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
7 Mar
10-14 wk
18 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
25 Apr – 2 May
3-4 wk
23 May
1 wk after
Cornflower
Centaurea cyanus
13 May
13 Jul
0 wk
14 May
3 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
6 – 20 Mar
22 Mar
8-10 wk
15 May
17 May
0 wk
Sweet William
Dianthus barbatus
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
23 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
20 Mar – 3 Apr
5 Apr
6-8 wk
15 May
17 May
0 wk
14 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
18 Mar – 1 Apr
10 Apr
6-8 wk
13 May
22 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
24 Mar – 21 Apr
24 Apr
4-8 wk
19 May
22 May
1 wk after
19 May
1 wk after
Foxglove
Digitalis purpurea
4 – 18 Mar
8-10 wk
13 May
0 wk
26 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
28 Feb – 28 Mar
2 May
8-12 wk
23 May
27 Jun
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
20 Mar – 3 Apr
15 Apr
6-8 wk
15 May
27 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
21 Apr – 5 May
4-6 wk
2 Jun
3 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
5 Apr
8-10 wk
18 May
31 May
1 wk after
Love in a mist
Nigella damascena
13 May
19 Jun
0 wk
14 May
9 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
20 Mar – 3 Apr
26 Mar
6-8 wk
15 May
0 wk
14 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
5 Apr
8-12 wk
18 May
31 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
20 Feb – 20 Mar
19 Mar
8-12 wk
15 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
28 Feb – 28 Mar
8-12 wk
23 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
28 Mar – 11 Apr
6-8 wk
23 May
1 wk after
Corn poppy
Papaver rhoeas
13 May
4 Jul
0 wk
14 May
24 Jun
0 wk
Snapdragon
Antirrhinum majus
18 Feb – 18 Mar
29 Apr
8-12 wk
13 May
24 Jun
0 wk
23 May
14 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
14 – 28 Mar
1 Apr
8-10 wk
23 May
27 May
1 wk after
Sweet pea
Lathyrus odoratus
18 Mar – 8 Apr
29 May
5-8 wk
13 May
3 Jul
0 wk
Stock
Matthiola incana
18 Mar – 1 Apr
23 May
6-8 wk
13 May
4 Jul
0 wk
26 May
24 Jun
2 wk after
Wormwood
Artemisia absinthium
18 Mar – 1 Apr
2 May
6-8 wk
13 May
13 Jun
0 wk
26 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
11 – 25 Apr
4-6 wk
23 May
1 wk after
Garden pansy
Viola × wittrockiana
4 – 18 Mar
18 May
8-10 wk
13 May
13 Jul
0 wk
23 May
3 Jul
1 wk after
Petunia
Petunia
Greenhouse
20 Feb – 20 Mar
22 Mar
8-12 wk
15 May
17 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
19 Apr
6-8 wk
18 May
31 May
1 wk after
25 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
3 – 17 Apr
14 Apr
4-6 wk
15 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
18 Apr – 2 May
3-5 wk
23 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
3 – 17 Apr
24 Apr
4-6 wk
15 May
22 May
0 wk
26 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
10 Mar – 7 Apr
8-12 wk
2 Jun
3 wk after
Bee balm
Monarda didyma
18 Feb – 18 Mar
9 Apr
8-12 wk
13 May
4 Jun
0 wk
7 Jun
4 wk after
Yarrow
Achillea millefolium
18 Mar – 1 Apr
2 Apr
6-8 wk
13 May
14 May
0 wk
26 May
2 wk after
Safflower
Carthamus tinctorius
13 May
13 Jun
0 wk
14 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
18 Mar – 1 Apr
22 May
6-8 wk
13 May
3 Jul
0 wk
27 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
1 – 15 Apr
27 May
4-6 wk
13 May
24 Jun
0 wk
26 May
14 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
28 Feb – 14 Mar
10-12 wk
23 May
1 wk after
Sunflower
Helianthus annuus
5 – 12 May
15 May
3-4 wk
2 Jun
5 Jun
3 wk after
7 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
4 May
6-8 wk
2 Jun
15 Jun
3 wk after
25 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
18 Mar – 1 Apr
15 Apr
6-8 wk
13 May
27 May
0 wk
26 May
2 wk after
Hollyhock
Alcea rosea
18 Mar – 1 Apr
6-8 wk
13 May
0 wk
26 May
2 wk after
Alpine delphinium
Delphinium elatum
18 Feb – 18 Mar
9 Apr
8-12 wk
13 May
4 Jun
0 wk
7 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
20 Mar – 3 Apr
15 Apr
6-8 wk
15 May
27 May
0 wk
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
24 Apr
6-8 wk
18 May
5 Jun
1 wk after
25 Jun
6 wk after
Wood sage
Salvia nemorosa
4 – 18 Mar
30 Mar
8-10 wk
13 May
25 May
0 wk
7 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
14 Mar – 11 Apr
6-10 wk
23 May
1 wk after
California goldenpoppy
Eschscholzia californica
13 May
30 Jun
0 wk
14 May
20 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
14 – 28 Mar
25 Apr
8-10 wk
23 May
20 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
18 Mar – 1 Apr
2 May
6-8 wk
13 May
13 Jun
0 wk
26 May
3 Jun
2 wk after