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Method
Rel. frost
Last spring frost (0°C) 28 May Frost 1 of 10 years · 20 years of data
Frost-free season 133 days 28 May – 8 Oct
Probability that frost is over

90% = 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)
9 – 23 Apr
16 Jun
5-7 wk
28 May
21 Jul
0 wk
1 Jun
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
16 – 30 Apr
28 Jun
4-6 wk
28 May
26 Jul
0 wk
1 Jun
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
11 Mar – 8 Apr
8-12 wk
3 Jun
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
9 – 23 Apr
11 Jun
5-7 wk
28 May
16 Jul
0 wk
28 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
6 – 13 May
7 May
3-4 wk
3 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
25 May – 1 Jun
8 Jun
4-5 wk
29 Jun
6 Jul
5 wk after
16 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
8 – 15 Jun
3-4 wk
6 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
5 Mar – 2 Apr
1 Apr
8-12 wk
28 May
0 wk
18 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
1 Jun
16 Jun
1 wk after
1 Jun
6 Jun
1 wk after
Maize
Zea mays
Greenhouse
30 Apr – 7 May
3-4 wk
28 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 May
5 Jul
3-4 wk
30 May
26 Jul
0 wk
18 Jun
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 May
6 Jul
0 wk
28 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
9 – 23 Apr
11 Jun
5-7 wk
28 May
16 Jul
0 wk
28 May
6 Jul
0 wk
Potato
Solanum tuberosum
2 – 16 May
8 Jun
4-6 wk
13 Jun
6 Jul
2 wk after
13 Jun
26 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Apr
21 Jun
5-7 wk
28 May
26 Jul
0 wk
1 Jun
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
13 – 20 May
3-4 wk
10 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 May
14 Jun
3-4 wk
30 May
5 Jul
0 wk
18 Jun
25 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
16 – 30 Apr
23 Jun
4-6 wk
28 May
21 Jul
0 wk
Lettuce
Lactuca sativa
30 Apr – 7 May
10 Jul
3-4 wk
28 May
31 Jul
0 wk
1 Jun
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
16 – 30 Apr
23 Jun
4-6 wk
28 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Apr – 14 May
2 Jun
2-4 wk
28 May
16 Jun
0 wk
28 May
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
1 Jun
16 Jun
1 wk after
1 Jun
6 Jun
1 wk after
Spinach
Spinacia oleracea
30 Apr – 7 May
25 Jul
3-4 wk
28 May
15 Aug
0 wk
24 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
29 Jun – 13 Jul
4-6 wk
10 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
2 – 16 Apr
6 Apr
6-8 wk
28 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
6 – 20 May
14 May
2-4 wk
3 Jun
1 wk after
2 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
16 – 30 Apr
23 Jun
4-6 wk
28 May
21 Jul
0 wk
Garden pea
Pisum sativum
30 Apr – 7 May
25 Jun
3-4 wk
28 May
16 Jul
0 wk
1 Jun
6 Jul
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
Greenhouse
22 Apr – 6 May
13 May
4-6 wk
3 Jun
10 Jun
1 wk after
Lemon balm
Melissa officinalis
19 Mar – 2 Apr
21 May
8-10 wk
28 May
16 Jul
0 wk
2 Jul
6 Jul
5 wk after
Dill
Anethum graveolens
1 Jun
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
2 – 16 Apr
4 Jun
6-8 wk
28 May
16 Jul
0 wk
1 Jun
6 Jul
1 wk after
Spearmint
Mentha spicata
5 Mar – 2 Apr
21 May
8-12 wk
28 May
16 Jul
0 wk
2 Jul
6 Jul
5 wk after
Coriander
Coriandrum sativum
28 May
15 Aug
0 wk
18 Jun
5 Aug
3 wk after
Garden sage
Salvia officinalis
21 Mar – 4 Apr
6 May
8-10 wk
30 May
1 Jul
0 wk
Common thyme
Thymus vulgaris
19 Mar – 2 Apr
11 May
8-10 wk
28 May
6 Jul
0 wk
Oregano
Origanum vulgare
2 – 16 Apr
25 May
6-8 wk
28 May
6 Jul
0 wk
2 Jul
5 wk after
Parsley
Petroselinum crispum
2 – 16 Apr
25 May
6-8 wk
28 May
6 Jul
0 wk
1 Jun
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
21 Feb – 21 Mar
7 Apr
10-14 wk
30 May
16 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
6 – 13 May
20 May
3-4 wk
3 Jun
10 Jun
1 wk after
Cornflower
Centaurea cyanus
28 May
16 Jul
0 wk
1 Jun
6 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
25 Mar – 8 Apr
17 Apr
8-10 wk
3 Jun
12 Jun
1 wk after
Sweet William
Dianthus barbatus
2 – 16 Apr
6-8 wk
28 May
0 wk
13 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
8 – 22 Apr
1 May
6-8 wk
3 Jun
12 Jun
1 wk after
26 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
13 – 27 Apr
19 Apr
6-8 wk
8 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
23 Apr – 21 May
21 May
4-8 wk
18 Jun
18 Jun
3 wk after
18 Jun
3 wk after
Foxglove
Digitalis purpurea
19 Mar – 2 Apr
8-10 wk
28 May
0 wk
18 Jun
3 wk after
Busy lizzie
Impatiens walleriana
6 Apr – 4 May
8 May
8-12 wk
29 Jun
3 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
29 Apr – 13 May
4-6 wk
10 Jun
2 wk after
Chinese lantern
Physalis alkekengi
21 Mar – 4 Apr
21 Apr
8-10 wk
30 May
16 Jun
0 wk
Love in a mist
Nigella damascena
28 May
1 Jul
0 wk
1 Jun
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
8 – 22 Apr
21 Apr
6-8 wk
3 Jun
1 wk after
26 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
7 Mar – 4 Apr
21 Apr
8-12 wk
30 May
16 Jun
0 wk
Cardoon
Cynara cardunculus
18 Mar – 15 Apr
22 Mar
8-12 wk
10 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
11 Mar – 8 Apr
5 Apr
8-12 wk
3 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
8 – 22 Apr
19 Apr
6-8 wk
3 Jun
1 wk after
Corn poppy
Papaver rhoeas
28 May
16 Jul
0 wk
1 Jun
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
5 Mar – 2 Apr
11 May
8-12 wk
28 May
6 Jul
0 wk
13 Jun
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
1 – 15 Apr
27 Apr
8-10 wk
10 Jun
22 Jun
2 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Apr
1 Jun
5-8 wk
28 May
6 Jul
0 wk
Stock
Matthiola incana
2 – 16 Apr
4 Jun
6-8 wk
28 May
16 Jul
0 wk
18 Jun
6 Jul
3 wk after
Wormwood
Artemisia absinthium
2 – 16 Apr
5 May
6-8 wk
28 May
16 Jun
0 wk
18 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
22 Apr – 6 May
28 Apr
4-6 wk
3 Jun
1 wk after
Garden pansy
Viola × wittrockiana
19 Mar – 2 Apr
21 May
8-10 wk
28 May
16 Jul
0 wk
13 Jun
6 Jul
2 wk after
Petunia
Petunia
Fleece
11 Mar – 8 Apr
17 Apr
8-12 wk
3 Jun
12 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Apr
5 May
6-8 wk
30 May
16 Jun
0 wk
16 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
22 Apr – 6 May
13 May
4-6 wk
3 Jun
10 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
29 Apr – 13 May
20 May
3-5 wk
3 Jun
10 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
29 Apr – 13 May
3 May
4-6 wk
10 Jun
2 wk after
16 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
6 Apr – 4 May
12 Apr
8-12 wk
29 Jun
5 wk after
Bee balm
Monarda didyma
5 Mar – 2 Apr
21 Apr
8-12 wk
28 May
16 Jun
0 wk
2 Jul
5 wk after
Yarrow
Achillea millefolium
2 – 16 Apr
5 Apr
6-8 wk
28 May
0 wk
18 Jun
3 wk after
Safflower
Carthamus tinctorius
28 May
16 Jun
0 wk
1 Jun
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
2 – 16 Apr
25 May
6-8 wk
28 May
6 Jul
0 wk
10 May
26 Jun
3 wk before
Bishop's flower
Ammi majus
16 – 30 Apr
8 Jun
4-6 wk
28 May
6 Jul
0 wk
18 Jun
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
11 – 25 Mar
20 Mar
10-12 wk
3 Jun
1 wk after
Sunflower
Helianthus annuus
13 – 20 May
15 Jun
3-4 wk
10 Jun
6 Jul
2 wk after
2 Jul
5 wk after
China aster
Callistephus chinensis
15 – 29 Apr
4 Jun
6-8 wk
10 Jun
16 Jul
2 wk after
16 Jul
7 wk after
Annual phlox
Phlox drummondii
8 – 22 Apr
13 Apr
6-8 wk
3 Jun
1 wk after
16 Jul
7 wk after
Hollyhock
Alcea rosea
2 – 16 Apr
6-8 wk
28 May
0 wk
18 Jun
3 wk after
Alpine delphinium
Delphinium elatum
5 Mar – 2 Apr
21 Apr
8-12 wk
28 May
16 Jun
0 wk
2 Jul
5 wk after
African marigold
Tagetes erecta
Fleece
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Apr
25 May
6-8 wk
30 May
6 Jul
0 wk
16 Jul
7 wk after
Wood sage
Salvia nemorosa
19 Mar – 2 Apr
11 Apr
8-10 wk
28 May
6 Jun
0 wk
2 Jul
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
25 Mar – 22 Apr
29 Apr
6-10 wk
3 Jun
10 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
28 May
16 Jul
0 wk
1 Jun
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
1 – 15 Apr
11 May
8-10 wk
10 Jun
6 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Apr
5 May
6-8 wk
28 May
16 Jun
0 wk
18 Jun
3 wk after