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Method
Rel. frost
Last spring frost (0°C) 23 May Frost 3 of 4 years · 20 years of data
Frost-free season 98 days 23 May – 29 Aug
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)
4 – 18 Apr
16 Jun
5-7 wk
23 May
21 Jul
0 wk
27 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
28 Jun
4-6 wk
23 May
26 Jul
0 wk
27 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Apr
11 Jun
5-7 wk
23 May
16 Jul
0 wk
23 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
1 – 8 May
17 May
3-4 wk
29 May
7 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
27 May
4-5 wk
5 Jun
24 Jun
2 wk after
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
28 Feb – 28 Mar
20 Mar
8-12 wk
23 May
0 wk
2 Jun
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
27 May
1 wk after
27 May
1 wk after
Maize
Zea mays
Greenhouse
25 Apr – 2 May
7 May
3-4 wk
23 May
28 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
27 Apr – 4 May
23 Jun
3-4 wk
25 May
14 Jul
0 wk
13 Jun
4 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 May
5 Jul
0 wk
23 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Apr
11 Jun
5-7 wk
23 May
16 Jul
0 wk
23 May
6 Jul
0 wk
Potato
Solanum tuberosum
27 Apr – 11 May
13 May
4-6 wk
8 Jun
10 Jun
2 wk after
8 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Apr
20 Jun
5-7 wk
23 May
25 Jul
0 wk
27 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
8 – 15 May
22 May
3-4 wk
5 Jun
12 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
27 Apr – 4 May
6 May
3-4 wk
25 May
27 May
0 wk
13 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
23 Jun
4-6 wk
23 May
21 Jul
0 wk
Lettuce
Lactuca sativa
25 Apr – 2 May
9 Jul
3-4 wk
23 May
30 Jul
0 wk
27 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
23 Jun
4-6 wk
23 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Apr – 9 May
18 May
2-4 wk
23 May
1 Jun
0 wk
23 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
27 May
1 wk after
27 May
1 wk after
Spinach
Spinacia oleracea
25 Apr – 2 May
25 Jul
3-4 wk
23 May
15 Aug
0 wk
19 May
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
24 Jun – 8 Jul
4-6 wk
5 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
28 Mar – 11 Apr
16 Apr
6-8 wk
23 May
28 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
1 – 15 May
24 May
2-4 wk
29 May
7 Jun
1 wk after
27 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
23 Jun
4-6 wk
23 May
21 Jul
0 wk
Garden pea
Pisum sativum
25 Apr – 2 May
24 Jun
3-4 wk
23 May
15 Jul
0 wk
27 May
5 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
17 Apr – 1 May
24 May
4-6 wk
29 May
21 Jun
1 wk after
Lemon balm
Melissa officinalis
14 – 28 Mar
20 May
8-10 wk
23 May
15 Jul
0 wk
27 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
27 May
14 Jul
1 wk after
Wild chives
Allium schoenoprasum
28 Mar – 11 Apr
4 Jun
6-8 wk
23 May
16 Jul
0 wk
27 May
6 Jul
1 wk after
Spearmint
Mentha spicata
28 Feb – 28 Mar
21 May
8-12 wk
23 May
16 Jul
0 wk
27 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
23 May
3 Aug
0 wk
13 Jun
24 Jul
3 wk after
Garden sage
Salvia officinalis
16 – 30 Mar
6 May
8-10 wk
25 May
1 Jul
0 wk
Common thyme
Thymus vulgaris
14 – 28 Mar
11 May
8-10 wk
23 May
6 Jul
0 wk
Oregano
Origanum vulgare
28 Mar – 11 Apr
25 May
6-8 wk
23 May
6 Jul
0 wk
27 Jun
5 wk after
Parsley
Petroselinum crispum
28 Mar – 11 Apr
25 May
6-8 wk
23 May
6 Jul
0 wk
27 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
16 Feb – 16 Mar
18 Mar
10-14 wk
25 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
Greenhouse
1 – 8 May
31 May
3-4 wk
29 May
21 Jun
1 wk after
Cornflower
Centaurea cyanus
23 May
16 Jul
0 wk
27 May
6 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
20 Mar – 3 Apr
22 Apr
8-10 wk
29 May
17 Jun
1 wk after
Sweet William
Dianthus barbatus
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
8 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
3 – 17 Apr
6 May
6-8 wk
29 May
17 Jun
1 wk after
21 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
8 – 22 Apr
30 Apr
6-8 wk
3 Jun
11 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 May
14 May
4-8 wk
27 Jun
5 wk after
27 Jun
5 wk after
Foxglove
Digitalis purpurea
14 – 28 Mar
8-10 wk
23 May
0 wk
13 Jun
3 wk after
Busy lizzie
Impatiens walleriana
1 – 29 Apr
18 May
8-12 wk
24 Jun
13 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
10 – 24 Apr
2 May
6-8 wk
5 Jun
13 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
24 Apr – 8 May
4-6 wk
5 Jun
2 wk after
Chinese lantern
Physalis alkekengi
16 – 30 Mar
9 Apr
8-10 wk
25 May
4 Jun
0 wk
Love in a mist
Nigella damascena
23 May
30 Jun
0 wk
27 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
3 – 17 Apr
26 Apr
6-8 wk
29 May
7 Jun
1 wk after
21 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
2 – 30 Mar
9 Apr
8-12 wk
25 May
4 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
28 Feb – 28 Mar
22 Mar
8-12 wk
23 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
6 Mar – 3 Apr
16 Apr
8-12 wk
29 May
11 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
3 – 17 Apr
30 Apr
6-8 wk
29 May
11 Jun
1 wk after
Corn poppy
Papaver rhoeas
23 May
15 Jul
0 wk
27 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
10 May
8-12 wk
23 May
5 Jul
0 wk
8 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Mar – 10 Apr
2 May
8-10 wk
5 Jun
27 Jun
2 wk after
Sweet pea
Lathyrus odoratus
28 Mar – 18 Apr
1 Jun
5-8 wk
23 May
6 Jul
0 wk
Stock
Matthiola incana
28 Mar – 11 Apr
3 Jun
6-8 wk
23 May
15 Jul
0 wk
13 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
28 Mar – 11 Apr
5 May
6-8 wk
23 May
16 Jun
0 wk
13 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
17 Apr – 1 May
9 May
4-6 wk
29 May
6 Jun
1 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Mar
21 May
8-10 wk
23 May
16 Jul
0 wk
8 Jun
6 Jul
2 wk after
Petunia
Petunia
Fleece
6 Mar – 3 Apr
22 Apr
8-12 wk
29 May
17 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
30 Mar – 13 Apr
23 Apr
6-8 wk
25 May
4 Jun
0 wk
11 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
17 Apr – 1 May
24 May
4-6 wk
29 May
21 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
24 Apr – 8 May
31 May
3-5 wk
29 May
21 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
17 Apr – 1 May
21 May
4-6 wk
29 May
18 Jun
1 wk after
27 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
13 Mar – 10 Apr
16 May
8-12 wk
5 Jun
11 Jul
2 wk after
Bee balm
Monarda didyma
28 Feb – 28 Mar
20 Apr
8-12 wk
23 May
15 Jun
0 wk
27 Jun
5 wk after
Yarrow
Achillea millefolium
28 Mar – 11 Apr
5 Apr
6-8 wk
23 May
0 wk
13 Jun
3 wk after
Safflower
Carthamus tinctorius
23 May
16 Jun
0 wk
27 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
28 Mar – 11 Apr
25 May
6-8 wk
23 May
6 Jul
0 wk
5 May
26 Jun
3 wk before
Bishop's flower
Ammi majus
11 – 25 Apr
7 Jun
4-6 wk
23 May
5 Jul
0 wk
13 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
6 – 20 Mar
20 Mar
10-12 wk
29 May
29 May
1 wk after
Sunflower
Helianthus annuus
8 – 15 May
26 May
3-4 wk
5 Jun
16 Jun
2 wk after
27 Jun
5 wk after
China aster
Callistephus chinensis
10 – 24 Apr
15 May
6-8 wk
5 Jun
26 Jun
2 wk after
11 Jul
7 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
2 May
6-8 wk
29 May
13 Jun
1 wk after
11 Jul
7 wk after
Hollyhock
Alcea rosea
28 Mar – 11 Apr
6-8 wk
23 May
0 wk
13 Jun
3 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
20 Apr
8-12 wk
23 May
15 Jun
0 wk
27 Jun
5 wk after
African marigold
Tagetes erecta
10 – 24 Apr
2 May
6-8 wk
5 Jun
13 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
30 Mar – 13 Apr
5 May
6-8 wk
25 May
16 Jun
0 wk
11 Jul
7 wk after
Wood sage
Salvia nemorosa
14 – 28 Mar
10 Apr
8-10 wk
23 May
5 Jun
0 wk
27 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
20 Mar – 17 Apr
10 May
6-10 wk
29 May
21 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
23 May
8 Jul
0 wk
27 May
28 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
20 Mar – 3 Apr
29 Apr
8-10 wk
29 May
24 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
28 Mar – 11 Apr
5 May
6-8 wk
23 May
16 Jun
0 wk
13 Jun
3 wk after