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Method
Rel. frost
Last spring frost (0°C) 15 May Frost 9 of 10 years · 20 years of data
Frost-free season 110 days 15 May – 2 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)
27 Mar – 10 Apr
12 Jun
5-7 wk
15 May
17 Jul
0 wk
16 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
24 Jun
4-6 wk
15 May
22 Jul
0 wk
16 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
7 Jun
5-7 wk
15 May
12 Jul
0 wk
15 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
23 – 30 Apr
24 May
4-5 wk
28 May
21 Jun
2 wk after
9 Jun
11 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)
20 Feb – 20 Mar
25 Mar
8-12 wk
15 May
20 May
0 wk
28 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 May
9 Jun
0 wk
16 May
30 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)
19 – 26 Apr
20 Jun
3-4 wk
17 May
11 Jul
0 wk
28 May
1 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
27 Jun
0 wk
15 May
17 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
7 Jun
5-7 wk
15 May
12 Jul
0 wk
15 May
2 Jul
0 wk
Potato
Solanum tuberosum
13 – 27 Apr
25 May
4-6 wk
25 May
22 Jun
1 wk after
25 May
12 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
12 Jun
5-7 wk
15 May
17 Jul
0 wk
16 May
7 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
3 Jun
3-4 wk
17 May
24 Jun
0 wk
28 May
14 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
19 Jun
4-6 wk
15 May
17 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
1 Jul
3-4 wk
15 May
22 Jul
0 wk
16 May
12 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
19 Jun
4-6 wk
15 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
29 May
2-4 wk
15 May
12 Jun
0 wk
15 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 May
9 Jun
0 wk
16 May
30 May
0 wk
Spinach
Spinacia oleracea
17 – 24 Apr
21 Jul
3-4 wk
15 May
11 Aug
0 wk
12 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 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
28 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
19 Jun
4-6 wk
15 May
17 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
16 Jun
3-4 wk
15 May
7 Jul
0 wk
16 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
9 – 23 Apr
4-6 wk
21 May
1 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
12 May
8-10 wk
15 May
7 Jul
0 wk
9 Jun
27 Jun
4 wk after
Dill
Anethum graveolens
16 May
11 Jul
0 wk
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
31 May
6-8 wk
15 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Spearmint
Mentha spicata
20 Feb – 20 Mar
17 May
8-12 wk
15 May
12 Jul
0 wk
9 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
15 May
31 Jul
0 wk
28 May
21 Jul
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
2 May
8-10 wk
17 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
7 May
8-10 wk
15 May
2 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
21 May
6-8 wk
15 May
2 Jul
0 wk
9 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
21 May
6-8 wk
15 May
2 Jul
0 wk
16 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
18 Mar
10-14 wk
17 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
23 – 30 Apr
3-4 wk
21 May
1 wk after
Cornflower
Centaurea cyanus
15 May
12 Jul
0 wk
16 May
2 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
6 – 20 Mar
28 Mar
8-10 wk
15 May
23 May
0 wk
Sweet William
Dianthus barbatus
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
25 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
20 Mar – 3 Apr
11 Apr
6-8 wk
15 May
23 May
0 wk
16 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
20 Mar – 3 Apr
15 Apr
6-8 wk
15 May
27 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
26 Mar – 23 Apr
29 Apr
4-8 wk
21 May
27 May
1 wk after
21 May
1 wk after
Foxglove
Digitalis purpurea
6 – 20 Mar
8-10 wk
15 May
0 wk
28 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
26 Feb – 26 Mar
14 May
8-12 wk
21 May
9 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
20 Mar – 3 Apr
21 Apr
6-8 wk
15 May
2 Jun
0 wk
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
4-6 wk
28 May
2 wk after
Chinese lantern
Physalis alkekengi
8 – 22 Mar
6 Apr
8-10 wk
17 May
1 Jun
0 wk
Love in a mist
Nigella damascena
15 May
22 Jun
0 wk
16 May
12 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
20 Mar – 3 Apr
1 Apr
6-8 wk
15 May
0 wk
16 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
22 Feb – 22 Mar
6 Apr
8-12 wk
17 May
1 Jun
0 wk
Cardoon
Cynara cardunculus
Season too short
20 Feb – 20 Mar
18 Mar
8-12 wk
15 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
1 wk after
Corn poppy
Papaver rhoeas
15 May
7 Jul
0 wk
16 May
27 Jun
0 wk
Snapdragon
Antirrhinum majus
20 Feb – 20 Mar
2 May
8-12 wk
15 May
27 Jun
0 wk
25 May
17 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
12 – 26 Mar
7 Apr
8-10 wk
21 May
2 Jun
1 wk after
Sweet pea
Lathyrus odoratus
20 Mar – 10 Apr
28 May
5-8 wk
15 May
2 Jul
0 wk
Stock
Matthiola incana
20 Mar – 3 Apr
26 May
6-8 wk
15 May
7 Jul
0 wk
28 May
27 Jun
2 wk after
Wormwood
Artemisia absinthium
20 Mar – 3 Apr
1 May
6-8 wk
15 May
12 Jun
0 wk
28 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
9 – 23 Apr
4-6 wk
21 May
1 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
17 May
8-10 wk
15 May
12 Jul
0 wk
25 May
2 Jul
1 wk after
Petunia
Petunia
Greenhouse
20 Feb – 20 Mar
28 Mar
8-12 wk
15 May
23 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
22 Mar – 5 Apr
20 Apr
6-8 wk
17 May
1 Jun
0 wk
27 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
3 – 17 Apr
26 Apr
4-6 wk
15 May
24 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
16 – 30 Apr
3-5 wk
21 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
3 – 17 Apr
29 Apr
4-6 wk
15 May
27 May
0 wk
28 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
5 Mar – 2 Apr
8-12 wk
28 May
2 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
12 Apr
8-12 wk
15 May
7 Jun
0 wk
9 Jun
4 wk after
Yarrow
Achillea millefolium
20 Mar – 3 Apr
1 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Safflower
Carthamus tinctorius
15 May
12 Jun
0 wk
16 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
20 Mar – 3 Apr
21 May
6-8 wk
15 May
2 Jul
0 wk
29 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
3 – 17 Apr
30 May
4-6 wk
15 May
27 Jun
0 wk
28 May
17 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
26 Feb – 12 Mar
10-12 wk
21 May
1 wk after
Sunflower
Helianthus annuus
30 Apr – 7 May
26 May
3-4 wk
28 May
16 Jun
2 wk after
9 Jun
4 wk after
China aster
Callistephus chinensis
2 – 16 Apr
15 May
6-8 wk
28 May
26 Jun
2 wk after
27 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
20 Mar – 3 Apr
21 Apr
6-8 wk
15 May
2 Jun
0 wk
28 May
2 wk after
Hollyhock
Alcea rosea
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
12 Apr
8-12 wk
15 May
7 Jun
0 wk
9 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
20 Mar – 3 Apr
21 Apr
6-8 wk
15 May
2 Jun
0 wk
Black-eyed Susan
Rudbeckia hirta
22 Mar – 5 Apr
5 May
6-8 wk
17 May
16 Jun
0 wk
27 Jun
6 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
2 Apr
8-10 wk
15 May
28 May
0 wk
9 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
12 Mar – 9 Apr
6-10 wk
21 May
1 wk after
California goldenpoppy
Eschscholzia californica
15 May
5 Jul
0 wk
16 May
25 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
12 – 26 Mar
26 Apr
8-10 wk
21 May
21 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
20 Mar – 3 Apr
1 May
6-8 wk
15 May
12 Jun
0 wk
28 May
2 Jun
2 wk after