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Method
Rel. frost
Last spring frost (0°C) 16 May Frost 9 of 10 years · 20 years of data
Frost-free season 108 days 16 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)
28 Mar – 11 Apr
14 Jun
5-7 wk
16 May
19 Jul
0 wk
20 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Apr
26 Jun
4-6 wk
16 May
24 Jul
0 wk
20 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Mar – 11 Apr
9 Jun
5-7 wk
16 May
14 Jul
0 wk
16 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
24 Apr – 1 May
23 May
4-5 wk
29 May
20 Jun
2 wk after
20 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
27 May – 3 Jun
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Feb – 21 Mar
13 Mar
8-12 wk
16 May
0 wk
6 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
20 May
28 May
1 wk after
20 May
1 wk after
Maize
Zea mays
Season too short
18 – 25 Apr
3-4 wk
16 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
19 Jun
3-4 wk
18 May
10 Jul
0 wk
6 Jun
30 Jun
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
16 May
28 Jun
0 wk
16 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Mar – 11 Apr
9 Jun
5-7 wk
16 May
14 Jul
0 wk
16 May
4 Jul
0 wk
Potato
Solanum tuberosum
20 Apr – 4 May
13 May
4-6 wk
1 Jun
10 Jun
2 wk after
1 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Mar – 11 Apr
13 Jun
5-7 wk
16 May
18 Jul
0 wk
20 May
8 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
17 May
3-4 wk
18 May
7 Jun
0 wk
6 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Apr
21 Jun
4-6 wk
16 May
19 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Apr
2 Jul
3-4 wk
16 May
23 Jul
0 wk
20 May
13 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
21 Jun
4-6 wk
16 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Apr – 2 May
17 May
2-4 wk
16 May
31 May
0 wk
16 May
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
20 May
28 May
1 wk after
20 May
1 wk after
Spinach
Spinacia oleracea
18 – 25 Apr
23 Jul
3-4 wk
16 May
13 Aug
0 wk
12 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
17 Jun – 1 Jul
4-6 wk
29 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
18 Apr – 2 May
2-4 wk
16 May
0 wk
6 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Apr
21 Jun
4-6 wk
16 May
19 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Apr
17 Jun
3-4 wk
16 May
8 Jul
0 wk
20 May
28 Jun
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
Season too short
10 – 24 Apr
4-6 wk
22 May
1 wk after
Lemon balm
Melissa officinalis
7 – 21 Mar
13 May
8-10 wk
16 May
8 Jul
0 wk
20 Jun
28 Jun
5 wk after
Dill
Anethum graveolens
20 May
10 Jul
1 wk after
Wild chives
Allium schoenoprasum
21 Mar – 4 Apr
2 Jun
6-8 wk
16 May
14 Jul
0 wk
20 May
4 Jul
1 wk after
Spearmint
Mentha spicata
21 Feb – 21 Mar
19 May
8-12 wk
16 May
14 Jul
0 wk
20 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
16 May
30 Jul
0 wk
6 Jun
20 Jul
3 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
4 May
8-10 wk
18 May
29 Jun
0 wk
Common thyme
Thymus vulgaris
7 – 21 Mar
9 May
8-10 wk
16 May
4 Jul
0 wk
Oregano
Origanum vulgare
21 Mar – 4 Apr
23 May
6-8 wk
16 May
4 Jul
0 wk
20 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
21 Mar – 4 Apr
23 May
6-8 wk
16 May
4 Jul
0 wk
20 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
18 Mar
10-14 wk
18 May
27 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
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Cornflower
Centaurea cyanus
16 May
14 Jul
0 wk
20 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Greenhouse
7 – 21 Mar
17 Mar
8-10 wk
16 May
0 wk
Sweet William
Dianthus barbatus
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
1 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
21 Mar – 4 Apr
31 Mar
6-8 wk
16 May
0 wk
26 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
21 Mar – 4 Apr
14 Apr
6-8 wk
16 May
26 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
11 Apr – 9 May
12 Apr
4-8 wk
6 Jun
3 wk after
6 Jun
3 wk after
Foxglove
Digitalis purpurea
7 – 21 Mar
8-10 wk
16 May
0 wk
6 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
27 Feb – 27 Mar
10 May
8-12 wk
22 May
5 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
21 Mar – 4 Apr
10 Apr
6-8 wk
16 May
22 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
2 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
5 Apr
8-10 wk
18 May
31 May
0 wk
Love in a mist
Nigella damascena
16 May
23 Jun
0 wk
20 May
13 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Season too short
21 Mar – 4 Apr
21 Mar
6-8 wk
16 May
0 wk
26 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
5 Apr
8-12 wk
18 May
31 May
0 wk
Cardoon
Cynara cardunculus
Greenhouse
21 Feb – 21 Mar
20 Mar
8-12 wk
16 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
27 Feb – 27 Mar
8-12 wk
22 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
Corn poppy
Papaver rhoeas
16 May
8 Jul
0 wk
20 May
28 Jun
1 wk after
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
3 May
8-12 wk
16 May
28 Jun
0 wk
1 Jun
18 Jun
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
13 – 27 Mar
27 Mar
8-10 wk
22 May
22 May
1 wk after
Sweet pea
Lathyrus odoratus
21 Mar – 11 Apr
30 May
5-8 wk
16 May
4 Jul
0 wk
Stock
Matthiola incana
21 Mar – 4 Apr
27 May
6-8 wk
16 May
8 Jul
0 wk
6 Jun
28 Jun
3 wk after
Wormwood
Artemisia absinthium
21 Mar – 4 Apr
3 May
6-8 wk
16 May
14 Jun
0 wk
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
10 – 24 Apr
4-6 wk
22 May
1 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Mar
19 May
8-10 wk
16 May
14 Jul
0 wk
1 Jun
4 Jul
2 wk after
Petunia
Petunia
Greenhouse
21 Feb – 21 Mar
17 Mar
8-12 wk
16 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
19 Apr
6-8 wk
18 May
31 May
0 wk
4 Jul
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
4 – 18 Apr
22 Apr
4-6 wk
16 May
20 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
17 Apr – 1 May
3-5 wk
22 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
4 – 18 Apr
28 Apr
4-6 wk
16 May
26 May
0 wk
6 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
2 wk after
Bee balm
Monarda didyma
21 Feb – 21 Mar
13 Apr
8-12 wk
16 May
8 Jun
0 wk
20 Jun
5 wk after
Yarrow
Achillea millefolium
21 Mar – 4 Apr
3 Apr
6-8 wk
16 May
0 wk
6 Jun
3 wk after
Safflower
Carthamus tinctorius
16 May
14 Jun
0 wk
20 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
21 Mar – 4 Apr
23 May
6-8 wk
16 May
4 Jul
0 wk
28 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
4 – 18 Apr
31 May
4-6 wk
16 May
28 Jun
0 wk
6 Jun
18 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
27 Feb – 13 Mar
10-12 wk
22 May
1 wk after
Sunflower
Helianthus annuus
1 – 8 May
26 May
3-4 wk
29 May
16 Jun
2 wk after
20 Jun
5 wk after
China aster
Callistephus chinensis
3 – 17 Apr
15 May
6-8 wk
29 May
26 Jun
2 wk after
4 Jul
7 wk after
Annual phlox
Phlox drummondii
Greenhouse
21 Mar – 4 Apr
10 Apr
6-8 wk
16 May
22 May
0 wk
6 Jun
3 wk after
Hollyhock
Alcea rosea
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
6 Jun
3 wk after
Alpine delphinium
Delphinium elatum
21 Feb – 21 Mar
13 Apr
8-12 wk
16 May
8 Jun
0 wk
20 Jun
5 wk after
African marigold
Tagetes erecta
Greenhouse
21 Mar – 4 Apr
10 Apr
6-8 wk
16 May
22 May
0 wk
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
5 May
6-8 wk
18 May
16 Jun
0 wk
4 Jul
7 wk after
Wood sage
Salvia nemorosa
7 – 21 Mar
3 Apr
8-10 wk
16 May
29 May
0 wk
20 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
13 Mar – 10 Apr
6-10 wk
22 May
1 wk after
California goldenpoppy
Eschscholzia californica
16 May
5 Jul
0 wk
20 May
25 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
13 – 27 Mar
25 Apr
8-10 wk
22 May
20 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
21 Mar – 4 Apr
3 May
6-8 wk
16 May
14 Jun
0 wk
6 Jun
3 wk after