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