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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 3 of 4 years · 20 years of data
Frost-free season 89 days 21 May – 18 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)
2 – 16 Apr
11 Jun
5-7 wk
21 May
16 Jul
0 wk
22 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
23 Jun
4-6 wk
21 May
21 Jul
0 wk
22 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
29 Apr – 6 May
23 May
3-4 wk
27 May
13 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
12 May
4-5 wk
3 Jun
9 Jun
2 wk after
15 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
1 – 8 Jun
3-4 wk
29 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
26 Feb – 26 Mar
17 Mar
8-12 wk
21 May
0 wk
27 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
0 wk
22 May
0 wk
Maize
Zea mays
Greenhouse
23 – 30 Apr
13 May
3-4 wk
21 May
3 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
8 Jun
3-4 wk
23 May
29 Jun
0 wk
3 Jun
19 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
29 Jun
0 wk
21 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
6 Jun
5-7 wk
21 May
11 Jul
0 wk
21 May
1 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
4 May
4-6 wk
31 May
1 Jun
1 wk after
31 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
14 Jun
5-7 wk
21 May
19 Jul
0 wk
22 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
6 – 13 May
28 May
3-4 wk
3 Jun
18 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
5 May
3-4 wk
23 May
26 May
0 wk
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
3 Jul
3-4 wk
21 May
24 Jul
0 wk
22 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
12 May
2-4 wk
21 May
26 May
0 wk
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
20 Jul
3-4 wk
21 May
10 Aug
0 wk
18 May
31 Jul
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
26 Mar – 9 Apr
22 Apr
6-8 wk
21 May
3 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
29 Apr – 13 May
30 May
2-4 wk
27 May
13 Jun
1 wk after
15 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
18 Jun
4-6 wk
21 May
16 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
18 Jun
3-4 wk
21 May
9 Jul
0 wk
22 May
29 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
15 – 29 Apr
21 May
4-6 wk
27 May
18 Jun
1 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
14 May
8-10 wk
21 May
9 Jul
0 wk
15 Jun
29 Jun
4 wk after
Dill
Anethum graveolens
22 May
29 Jun
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
16 May
8-12 wk
21 May
11 Jul
0 wk
15 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
19 Jul
0 wk
3 Jun
9 Jul
2 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
1 May
8-10 wk
23 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
12 – 26 Mar
6 May
8-10 wk
21 May
1 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
15 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
22 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
12 Feb – 12 Mar
24 Mar
10-14 wk
21 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
29 Apr – 6 May
28 May
3-4 wk
27 May
18 Jun
1 wk after
Cornflower
Centaurea cyanus
21 May
11 Jul
0 wk
22 May
1 Jul
0 wk
Statice
Limonium sinuatum
Fleece
18 Mar – 1 Apr
19 Apr
8-10 wk
27 May
14 Jun
1 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
1 – 15 Apr
3 May
6-8 wk
27 May
14 Jun
1 wk after
10 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Apr
27 Apr
6-8 wk
1 Jun
8 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Apr – 18 May
11 May
4-8 wk
15 Jun
4 wk after
15 Jun
4 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
30 Mar – 27 Apr
24 May
8-12 wk
22 Jun
19 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
8 – 22 Apr
28 Apr
6-8 wk
3 Jun
9 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
2 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
25 Mar
8-10 wk
23 May
0 wk
Love in a mist
Nigella damascena
21 May
24 Jun
0 wk
22 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
1 – 15 Apr
23 Apr
6-8 wk
27 May
4 Jun
1 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
25 Mar
8-12 wk
23 May
0 wk
Cardoon
Cynara cardunculus
Season too short
26 Feb – 26 Mar
17 Mar
8-12 wk
21 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
4 Mar – 1 Apr
13 Apr
8-12 wk
27 May
8 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
1 – 15 Apr
27 Apr
6-8 wk
27 May
8 Jun
1 wk after
Corn poppy
Papaver rhoeas
21 May
9 Jul
0 wk
22 May
29 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
4 May
8-12 wk
21 May
29 Jun
0 wk
31 May
19 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
25 Mar – 8 Apr
29 Apr
8-10 wk
3 Jun
24 Jun
2 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
27 May
5-8 wk
21 May
1 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
0 wk
3 Jun
29 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
15 – 29 Apr
6 May
4-6 wk
27 May
3 Jun
1 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
16 May
8-10 wk
21 May
11 Jul
0 wk
31 May
1 Jul
1 wk after
Petunia
Petunia
Fleece
4 Mar – 1 Apr
19 Apr
8-12 wk
27 May
14 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
8 Apr
6-8 wk
23 May
0 wk
3 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
15 – 29 Apr
21 May
4-6 wk
27 May
18 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
22 Apr – 6 May
28 May
3-5 wk
27 May
18 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
22 Apr – 6 May
11 May
4-6 wk
3 Jun
8 Jun
2 wk after
3 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
30 Mar – 27 Apr
28 Apr
8-12 wk
22 Jun
23 Jun
5 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
31 Mar
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
11 Jun
0 wk
22 May
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
20 May
6-8 wk
21 May
1 Jul
0 wk
5 May
21 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
1 Jun
4-6 wk
21 May
29 Jun
0 wk
3 Jun
19 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
4 – 18 Mar
23 Mar
10-12 wk
27 May
1 Jun
1 wk after
Sunflower
Helianthus annuus
Fleece
29 Apr – 6 May
1 Jun
3-4 wk
27 May
22 Jun
1 wk after
3 Jun
12 Jun
2 wk after
China aster
Callistephus chinensis
8 – 22 Apr
29 Apr
6-8 wk
3 Jun
10 Jun
2 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Apr
28 Apr
6-8 wk
27 May
9 Jun
1 wk after
3 Jul
6 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
14 Apr
8-12 wk
21 May
9 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
8 – 22 Apr
28 Apr
6-8 wk
3 Jun
9 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
19 Apr
6-8 wk
23 May
31 May
0 wk
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
4 Apr
8-10 wk
21 May
30 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
18 Mar – 15 Apr
7 May
6-10 wk
27 May
18 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
21 May
2 Jul
0 wk
22 May
22 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
14 Apr
8-10 wk
27 May
9 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
30 Apr
6-8 wk
21 May
11 Jun
0 wk
3 Jun
2 wk after