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