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Method
Rel. frost
Last spring frost (0°C) 22 May Frost 3 of 4 years · 20 years of data
Frost-free season 115 days 22 May – 14 Sep
Probability that frost is over

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