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Method
Rel. frost
Last spring frost (0°C) 28 May Frost 3 of 4 years · 20 years of data
Frost-free season 93 days 28 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)
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
15 May
3-4 wk
3 Jun
5 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
6 – 13 May
27 May
4-5 wk
10 Jun
24 Jun
2 wk after
2 Jul
5 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)
Fleece
5 Mar – 2 Apr
21 Mar
8-12 wk
28 May
0 wk
7 Jun
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
1 Jun
1 wk after
1 Jun
1 wk after
Maize
Zea mays
Greenhouse
30 Apr – 7 May
5 May
3-4 wk
28 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 May
23 Jun
3-4 wk
30 May
14 Jul
0 wk
18 Jun
4 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 May
2 Jul
0 wk
28 May
22 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
13 May
4-6 wk
13 Jun
2 wk after
13 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Apr
17 Jun
5-7 wk
28 May
22 Jul
0 wk
1 Jun
12 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
6 – 13 May
16 Jun
3-4 wk
3 Jun
7 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 May
10 May
3-4 wk
30 May
31 May
0 wk
18 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
6 Jul
3-4 wk
28 May
27 Jul
0 wk
1 Jun
17 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
18 May
2-4 wk
28 May
1 Jun
0 wk
28 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
1 Jun
1 wk after
1 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
14 Apr
6-8 wk
28 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
6 – 20 May
22 May
2-4 wk
3 Jun
5 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
21 Jun
3-4 wk
28 May
12 Jul
0 wk
1 Jun
2 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
25 May
4-6 wk
3 Jun
22 Jun
1 wk after
Lemon balm
Melissa officinalis
19 Mar – 2 Apr
17 May
8-10 wk
28 May
12 Jul
0 wk
2 Jul
2 Jul
5 wk after
Dill
Anethum graveolens
1 Jun
14 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
3 Aug
0 wk
18 Jun
24 Jul
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
18 Mar
10-14 wk
30 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
6 – 13 May
1 Jun
3-4 wk
3 Jun
22 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
22 Apr
8-10 wk
3 Jun
17 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
6 May
6-8 wk
3 Jun
17 Jun
1 wk after
26 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
13 – 27 Apr
1 May
6-8 wk
8 Jun
12 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
7 May – 4 Jun
15 May
4-8 wk
2 Jul
5 wk after
2 Jul
5 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
16 May
8-12 wk
29 Jun
11 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
15 – 29 Apr
2 May
6-8 wk
10 Jun
13 Jun
2 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
9 Apr
8-10 wk
30 May
4 Jun
0 wk
Love in a mist
Nigella damascena
28 May
27 Jun
0 wk
1 Jun
17 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
8 – 22 Apr
26 Apr
6-8 wk
3 Jun
7 Jun
1 wk after
26 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
7 Mar – 4 Apr
9 Apr
8-12 wk
30 May
4 Jun
0 wk
Cardoon
Cynara cardunculus
Greenhouse
5 Mar – 2 Apr
22 Mar
8-12 wk
28 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
11 Mar – 8 Apr
17 Apr
8-12 wk
3 Jun
12 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
8 – 22 Apr
1 May
6-8 wk
3 Jun
12 Jun
1 wk after
Corn poppy
Papaver rhoeas
28 May
12 Jul
0 wk
1 Jun
2 Jul
1 wk after
Snapdragon
Antirrhinum majus
5 Mar – 2 Apr
7 May
8-12 wk
28 May
2 Jul
0 wk
13 Jun
22 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
1 – 15 Apr
2 May
8-10 wk
10 Jun
27 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
31 May
6-8 wk
28 May
12 Jul
0 wk
18 Jun
2 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
10 May
4-6 wk
3 Jun
7 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
22 Apr
8-12 wk
3 Jun
17 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Apr
23 Apr
6-8 wk
30 May
4 Jun
0 wk
16 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
22 Apr – 6 May
25 May
4-6 wk
3 Jun
22 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
29 Apr – 13 May
1 Jun
3-5 wk
3 Jun
22 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
29 Apr – 13 May
15 May
4-6 wk
10 Jun
12 Jun
2 wk after
16 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
18 Mar – 15 Apr
17 May
8-12 wk
10 Jun
12 Jul
2 wk after
Bee balm
Monarda didyma
5 Mar – 2 Apr
17 Apr
8-12 wk
28 May
12 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
4 Jun
4-6 wk
28 May
2 Jul
0 wk
18 Jun
22 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
11 – 25 Mar
20 Mar
10-12 wk
3 Jun
1 wk after
Sunflower
Helianthus annuus
13 – 20 May
26 May
3-4 wk
10 Jun
16 Jun
2 wk after
2 Jul
5 wk after
China aster
Callistephus chinensis
15 – 29 Apr
15 May
6-8 wk
10 Jun
26 Jun
2 wk after
16 Jul
7 wk after
Annual phlox
Phlox drummondii
8 – 22 Apr
2 May
6-8 wk
3 Jun
13 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
17 Apr
8-12 wk
28 May
12 Jun
0 wk
2 Jul
5 wk after
African marigold
Tagetes erecta
15 – 29 Apr
2 May
6-8 wk
10 Jun
13 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Apr
5 May
6-8 wk
30 May
16 Jun
0 wk
16 Jul
7 wk after
Wood sage
Salvia nemorosa
19 Mar – 2 Apr
7 Apr
8-10 wk
28 May
2 Jun
0 wk
2 Jul
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
25 Mar – 22 Apr
11 May
6-10 wk
3 Jun
22 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
28 May
9 Jul
0 wk
1 Jun
29 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
25 Mar – 8 Apr
29 Apr
8-10 wk
3 Jun
24 Jun
1 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