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Method
Rel. frost
Last spring frost (0°C) 26 May Frost 3 of 4 years · 20 years of data
Frost-free season 99 days 26 May – 2 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)
7 – 21 Apr
14 Jun
5-7 wk
26 May
19 Jul
0 wk
30 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
14 – 28 Apr
26 Jun
4-6 wk
26 May
24 Jul
0 wk
30 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
9 Mar – 6 Apr
8-12 wk
1 Jun
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Apr
9 Jun
5-7 wk
26 May
14 Jul
0 wk
26 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
4 – 11 May
3-4 wk
1 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
4 – 11 May
25 May
4-5 wk
8 Jun
22 Jun
2 wk after
30 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
6 – 13 Jun
3-4 wk
4 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
3 – 31 Mar
25 Mar
8-12 wk
26 May
0 wk
26 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
30 May
1 wk after
30 May
1 wk after
Maize
Zea mays
Season too short
28 Apr – 5 May
3-4 wk
26 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Apr – 7 May
21 Jun
3-4 wk
28 May
12 Jul
0 wk
16 Jun
2 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
26 May
4 Jul
0 wk
26 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Apr
9 Jun
5-7 wk
26 May
14 Jul
0 wk
26 May
4 Jul
0 wk
Potato
Solanum tuberosum
Fleece
18 Apr – 2 May
15 May
4-6 wk
30 May
12 Jun
1 wk after
30 May
2 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Apr
19 Jun
5-7 wk
26 May
24 Jul
0 wk
30 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
4 – 11 May
15 Jun
3-4 wk
1 Jun
6 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Apr – 7 May
3-4 wk
28 May
0 wk
16 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
14 – 28 Apr
21 Jun
4-6 wk
26 May
19 Jul
0 wk
Lettuce
Lactuca sativa
28 Apr – 5 May
8 Jul
3-4 wk
26 May
29 Jul
0 wk
30 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
14 – 28 Apr
21 Jun
4-6 wk
26 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
28 Apr – 12 May
14 May
2-4 wk
26 May
28 May
0 wk
26 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
30 May
1 wk after
30 May
1 wk after
Spinach
Spinacia oleracea
28 Apr – 5 May
23 Jul
3-4 wk
26 May
13 Aug
0 wk
22 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
27 Jun – 11 Jul
4-6 wk
8 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
31 Mar – 14 Apr
6-8 wk
26 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
28 Apr – 12 May
17 Jun
2-4 wk
26 May
1 Jul
0 wk
16 Jun
21 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
14 – 28 Apr
21 Jun
4-6 wk
26 May
19 Jul
0 wk
Garden pea
Pisum sativum
28 Apr – 5 May
23 Jun
3-4 wk
26 May
14 Jul
0 wk
30 May
4 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
20 Apr – 4 May
24 May
4-6 wk
1 Jun
21 Jun
1 wk after
Lemon balm
Melissa officinalis
17 – 31 Mar
19 May
8-10 wk
26 May
14 Jul
0 wk
30 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
30 May
12 Jul
1 wk after
Wild chives
Allium schoenoprasum
31 Mar – 14 Apr
2 Jun
6-8 wk
26 May
14 Jul
0 wk
30 May
4 Jul
1 wk after
Spearmint
Mentha spicata
3 – 31 Mar
19 May
8-12 wk
26 May
14 Jul
0 wk
30 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
26 May
1 Aug
0 wk
16 Jun
22 Jul
3 wk after
Garden sage
Salvia officinalis
19 Mar – 2 Apr
4 May
8-10 wk
28 May
29 Jun
0 wk
Common thyme
Thymus vulgaris
17 – 31 Mar
9 May
8-10 wk
26 May
4 Jul
0 wk
Oregano
Origanum vulgare
31 Mar – 14 Apr
23 May
6-8 wk
26 May
4 Jul
0 wk
30 Jun
5 wk after
Parsley
Petroselinum crispum
31 Mar – 14 Apr
23 May
6-8 wk
26 May
4 Jul
0 wk
30 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
19 Feb – 19 Mar
20 Mar
10-14 wk
28 May
29 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
Greenhouse
4 – 11 May
31 May
3-4 wk
1 Jun
21 Jun
1 wk after
Cornflower
Centaurea cyanus
26 May
14 Jul
0 wk
30 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
23 Mar – 6 Apr
21 Apr
8-10 wk
1 Jun
16 Jun
1 wk after
Sweet William
Dianthus barbatus
31 Mar – 14 Apr
6-8 wk
26 May
0 wk
11 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
6 – 20 Apr
5 May
6-8 wk
1 Jun
16 Jun
1 wk after
24 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
11 – 25 Apr
30 Apr
6-8 wk
6 Jun
11 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
21 Apr – 19 May
21 May
4-8 wk
16 Jun
18 Jun
3 wk after
16 Jun
3 wk after
Foxglove
Digitalis purpurea
17 – 31 Mar
8-10 wk
26 May
0 wk
16 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
16 Mar – 13 Apr
11 Jun
8-12 wk
8 Jun
6 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
6 – 20 Apr
15 May
6-8 wk
1 Jun
26 Jun
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
27 Apr – 11 May
4-6 wk
8 Jun
2 wk after
Chinese lantern
Physalis alkekengi
19 Mar – 2 Apr
7 Apr
8-10 wk
28 May
2 Jun
0 wk
Love in a mist
Nigella damascena
26 May
29 Jun
0 wk
30 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
6 – 20 Apr
25 Apr
6-8 wk
1 Jun
6 Jun
1 wk after
24 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
5 Mar – 2 Apr
7 Apr
8-12 wk
28 May
2 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
3 – 31 Mar
20 Mar
8-12 wk
26 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
9 Mar – 6 Apr
16 Apr
8-12 wk
1 Jun
11 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
6 – 20 Apr
30 Apr
6-8 wk
1 Jun
11 Jun
1 wk after
Corn poppy
Papaver rhoeas
26 May
14 Jul
0 wk
30 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
3 – 31 Mar
9 May
8-12 wk
26 May
4 Jul
0 wk
11 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
30 Mar – 13 Apr
1 May
8-10 wk
8 Jun
26 Jun
2 wk after
Sweet pea
Lathyrus odoratus
31 Mar – 21 Apr
30 May
5-8 wk
26 May
4 Jul
0 wk
Stock
Matthiola incana
31 Mar – 14 Apr
2 Jun
6-8 wk
26 May
14 Jul
0 wk
16 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
31 Mar – 14 Apr
3 May
6-8 wk
26 May
14 Jun
0 wk
16 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
20 Apr – 4 May
9 May
4-6 wk
1 Jun
6 Jun
1 wk after
Garden pansy
Viola × wittrockiana
17 – 31 Mar
19 May
8-10 wk
26 May
14 Jul
0 wk
11 Jun
4 Jul
2 wk after
Petunia
Petunia
Fleece
9 Mar – 6 Apr
21 Apr
8-12 wk
1 Jun
16 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
2 – 16 Apr
21 Apr
6-8 wk
28 May
2 Jun
0 wk
14 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
20 Apr – 4 May
24 May
4-6 wk
1 Jun
21 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
27 Apr – 11 May
31 May
3-5 wk
1 Jun
21 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
27 Apr – 11 May
14 May
4-6 wk
8 Jun
11 Jun
2 wk after
14 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
16 Mar – 13 Apr
16 May
8-12 wk
8 Jun
11 Jul
2 wk after
Bee balm
Monarda didyma
3 – 31 Mar
19 Apr
8-12 wk
26 May
14 Jun
0 wk
30 Jun
5 wk after
Yarrow
Achillea millefolium
31 Mar – 14 Apr
3 Apr
6-8 wk
26 May
0 wk
16 Jun
3 wk after
Safflower
Carthamus tinctorius
26 May
14 Jun
0 wk
30 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
31 Mar – 14 Apr
23 May
6-8 wk
26 May
4 Jul
0 wk
8 May
24 Jun
3 wk before
Bishop's flower
Ammi majus
14 – 28 Apr
6 Jun
4-6 wk
26 May
4 Jul
0 wk
16 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
9 – 23 Mar
20 Mar
10-12 wk
1 Jun
1 wk after
Sunflower
Helianthus annuus
11 – 18 May
28 May
3-4 wk
8 Jun
18 Jun
2 wk after
30 Jun
5 wk after
China aster
Callistephus chinensis
13 – 27 Apr
17 May
6-8 wk
8 Jun
28 Jun
2 wk after
14 Jul
7 wk after
Annual phlox
Phlox drummondii
6 – 20 Apr
19 Apr
6-8 wk
1 Jun
1 wk after
14 Jul
7 wk after
Hollyhock
Alcea rosea
31 Mar – 14 Apr
6-8 wk
26 May
0 wk
16 Jun
3 wk after
Alpine delphinium
Delphinium elatum
3 – 31 Mar
19 Apr
8-12 wk
26 May
14 Jun
0 wk
30 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
6 – 20 Apr
15 May
6-8 wk
1 Jun
26 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
2 – 16 Apr
7 May
6-8 wk
28 May
18 Jun
0 wk
14 Jul
7 wk after
Wood sage
Salvia nemorosa
17 – 31 Mar
9 Apr
8-10 wk
26 May
4 Jun
0 wk
30 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
23 Mar – 20 Apr
10 May
6-10 wk
1 Jun
21 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
26 May
11 Jul
0 wk
30 May
1 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
30 Mar – 13 Apr
14 Apr
8-10 wk
8 Jun
9 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
31 Mar – 14 Apr
3 May
6-8 wk
26 May
14 Jun
0 wk
16 Jun
3 wk after