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Method
Rel. frost
Last spring frost (0°C) 18 May Frost 9 of 10 years · 20 years of data
Frost-free season 91 days 18 May – 17 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)
30 Mar – 13 Apr
13 Jun
5-7 wk
18 May
18 Jul
0 wk
19 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
25 Jun
4-6 wk
18 May
23 Jul
0 wk
19 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
8 Jun
5-7 wk
18 May
13 Jul
0 wk
18 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
1 – 8 May
3-4 wk
29 May
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
3 – 10 May
16 May
4-5 wk
7 Jun
13 Jun
3 wk after
12 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
31 May – 7 Jun
3-4 wk
28 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
12 Mar
8-12 wk
18 May
0 wk
31 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
19 May
27 May
0 wk
19 May
0 wk
Maize
Zea mays
Season too short
24 Apr – 1 May
3-4 wk
22 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
12 Jun
3-4 wk
24 May
3 Jul
1 wk after
31 May
23 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
20 Jun
0 wk
18 May
10 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
8 Jun
5-7 wk
18 May
13 Jul
0 wk
18 May
3 Jul
0 wk
Potato
Solanum tuberosum
16 – 30 Apr
12 May
4-6 wk
28 May
9 Jun
1 wk after
28 May
30 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
5 Jun
5-7 wk
18 May
10 Jul
0 wk
19 May
30 Jun
0 wk
Pumpkin
Cucurbita pepo
Season too short
1 – 8 May
3-4 wk
29 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Apr – 3 May
18 May
3-4 wk
24 May
8 Jun
1 wk after
31 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
24 Jun
3-4 wk
18 May
15 Jul
0 wk
19 May
5 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
18 May
2-4 wk
18 May
1 Jun
0 wk
18 May
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
19 May
27 May
0 wk
19 May
0 wk
Spinach
Spinacia oleracea
20 – 27 Apr
18 Jul
3-4 wk
18 May
8 Aug
0 wk
15 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
12 – 26 Jun
4-6 wk
24 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
24 Apr – 8 May
2-4 wk
22 May
1 wk after
31 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
20 Jun
4-6 wk
18 May
18 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
9 Jun
3-4 wk
18 May
30 Jun
0 wk
19 May
20 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
17 Apr – 1 May
4-6 wk
29 May
2 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
5 May
8-10 wk
18 May
30 Jun
0 wk
12 Jun
20 Jun
4 wk after
Dill
Anethum graveolens
19 May
3 Jul
0 wk
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
1 Jun
6-8 wk
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Spearmint
Mentha spicata
23 Feb – 23 Mar
18 May
8-12 wk
18 May
13 Jul
0 wk
12 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
18 May
23 Jul
0 wk
31 May
13 Jul
2 wk after
Garden sage
Salvia officinalis
15 – 29 Mar
3 May
8-10 wk
24 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
9 – 23 Mar
8 May
8-10 wk
18 May
3 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
12 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
19 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
9 Feb – 9 Mar
16 Mar
10-14 wk
18 May
25 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
1 – 8 May
3-4 wk
29 May
2 wk after
Cornflower
Centaurea cyanus
18 May
13 Jul
0 wk
19 May
3 Jul
0 wk
Statice
Limonium sinuatum
Season too short
13 – 27 Mar
8-10 wk
22 May
1 wk after
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
28 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
19 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Season too short
23 Mar – 6 Apr
30 Mar
6-8 wk
18 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
29 Mar – 26 Apr
13 Apr
4-8 wk
24 May
1 wk after
24 May
1 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
31 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
6 Mar – 3 Apr
16 Apr
8-12 wk
29 May
11 Jun
2 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
27 Mar – 10 Apr
2 Apr
6-8 wk
22 May
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
26 Apr – 10 May
4-6 wk
7 Jun
3 wk after
Chinese lantern
Physalis alkekengi
15 – 29 Mar
29 Mar
8-10 wk
24 May
24 May
1 wk after
Love in a mist
Nigella damascena
18 May
15 Jun
0 wk
19 May
5 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
27 Mar – 10 Apr
6-8 wk
22 May
1 wk after
19 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
1 – 29 Mar
29 Mar
8-12 wk
24 May
24 May
1 wk after
Cardoon
Cynara cardunculus
Season too short
27 Feb – 27 Mar
15 Mar
8-12 wk
22 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
3 – 17 Apr
6-8 wk
29 May
2 wk after
Corn poppy
Papaver rhoeas
18 May
30 Jun
0 wk
19 May
20 Jun
0 wk
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
25 Apr
8-12 wk
18 May
20 Jun
0 wk
28 May
10 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
20 Mar – 3 Apr
8-10 wk
29 May
2 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
29 May
5-8 wk
18 May
3 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
19 May
6-8 wk
18 May
30 Jun
0 wk
31 May
20 Jun
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
0 wk
31 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
17 Apr – 1 May
4-6 wk
29 May
2 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
18 May
8-10 wk
18 May
13 Jul
0 wk
28 May
3 Jul
1 wk after
Petunia
Petunia
Season too short
27 Feb – 27 Mar
9 Mar
8-12 wk
22 May
1 wk after
Sweet Scabious
Scabiosa atropurpurea
29 Mar – 12 Apr
12 Apr
6-8 wk
24 May
24 May
1 wk after
30 Jun
6 wk after
Common zinnia
Zinnia elegans
Season too short
10 – 24 Apr
4-6 wk
22 May
1 wk after
Common morning glory
Ipomoea purpurea
Season too short
24 Apr – 8 May
3-5 wk
29 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Season too short
10 – 24 Apr
13 Apr
4-6 wk
22 May
1 wk after
31 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
15 Mar – 12 Apr
8-12 wk
7 Jun
3 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
5 Apr
8-12 wk
18 May
31 May
0 wk
12 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
2 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Safflower
Carthamus tinctorius
18 May
9 Jun
0 wk
19 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
0 wk
2 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
23 May
4-6 wk
18 May
20 Jun
0 wk
31 May
10 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
6 – 20 Mar
10-12 wk
29 May
2 wk after
Sunflower
Helianthus annuus
Fleece
1 – 8 May
24 May
3-4 wk
29 May
14 Jun
2 wk after
31 May
4 Jun
2 wk after
China aster
Callistephus chinensis
12 – 26 Apr
27 Apr
6-8 wk
7 Jun
8 Jun
3 wk after
30 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
23 Mar – 6 Apr
2 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
31 May
2 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
5 Apr
8-12 wk
18 May
31 May
0 wk
12 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
27 Mar – 10 Apr
2 Apr
6-8 wk
22 May
1 wk after
Black-eyed Susan
Rudbeckia hirta
29 Mar – 12 Apr
17 Apr
6-8 wk
24 May
29 May
1 wk after
30 Jun
6 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
26 Mar
8-10 wk
18 May
21 May
0 wk
12 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
20 Mar – 17 Apr
6-10 wk
29 May
2 wk after
California goldenpoppy
Eschscholzia californica
18 May
24 Jun
0 wk
19 May
14 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
20 Mar – 3 Apr
18 Apr
8-10 wk
29 May
13 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
0 wk
31 May
3 Jun
2 wk after