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Method
Rel. frost
Last spring frost (0°C) 25 May Frost 3 of 4 years · 20 years of data
Frost-free season 94 days 25 May – 27 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)
6 – 20 Apr
15 Jun
5-7 wk
25 May
20 Jul
0 wk
29 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
13 – 27 Apr
27 Jun
4-6 wk
25 May
25 Jul
0 wk
29 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
8 Mar – 5 Apr
8-12 wk
31 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
6 – 20 Apr
10 Jun
5-7 wk
25 May
15 Jul
0 wk
25 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
3 – 10 May
3-4 wk
31 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
3 – 10 May
28 May
4-5 wk
7 Jun
25 Jun
2 wk after
29 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
5 – 12 Jun
3-4 wk
3 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Greenhouse
2 – 30 Mar
20 Mar
8-12 wk
25 May
0 wk
25 May
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
21 May
25 May
1 wk before
21 May
1 wk before
Maize
Zea mays
Season too short
27 Apr – 4 May
3-4 wk
25 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
24 Jun
3-4 wk
27 May
15 Jul
0 wk
15 Jun
5 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 May
5 Jul
0 wk
25 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
6 – 20 Apr
10 Jun
5-7 wk
25 May
15 Jul
0 wk
25 May
5 Jul
0 wk
Potato
Solanum tuberosum
Fleece
17 Apr – 1 May
3 May
4-6 wk
29 May
31 May
1 wk after
29 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
6 – 20 Apr
20 Jun
5-7 wk
25 May
25 Jul
0 wk
29 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
3 – 10 May
13 Jun
3-4 wk
31 May
4 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Fleece
27 Apr – 4 May
2 May
3-4 wk
25 May
0 wk
4 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Lettuce
Lactuca sativa
27 Apr – 4 May
9 Jul
3-4 wk
25 May
30 Jul
0 wk
29 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
27 Apr – 11 May
6 May
2-4 wk
25 May
0 wk
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
21 May
25 May
1 wk before
21 May
1 wk before
Spinach
Spinacia oleracea
27 Apr – 4 May
24 Jul
3-4 wk
25 May
14 Aug
0 wk
21 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
26 Jun – 10 Jul
4-6 wk
7 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
30 Mar – 13 Apr
6-8 wk
25 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
27 Apr – 11 May
15 Jun
2-4 wk
25 May
29 Jun
0 wk
15 Jun
19 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
13 – 27 Apr
22 Jun
4-6 wk
25 May
20 Jul
0 wk
Garden pea
Pisum sativum
27 Apr – 4 May
24 Jun
3-4 wk
25 May
15 Jul
0 wk
29 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
19 Apr – 3 May
22 May
4-6 wk
31 May
19 Jun
1 wk after
Lemon balm
Melissa officinalis
16 – 30 Mar
20 May
8-10 wk
25 May
15 Jul
0 wk
29 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
29 May
15 Jul
1 wk after
Wild chives
Allium schoenoprasum
30 Mar – 13 Apr
3 Jun
6-8 wk
25 May
15 Jul
0 wk
29 May
5 Jul
1 wk after
Spearmint
Mentha spicata
2 – 30 Mar
20 May
8-12 wk
25 May
15 Jul
0 wk
29 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
25 May
4 Aug
0 wk
15 Jun
25 Jul
3 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
5 May
8-10 wk
27 May
30 Jun
0 wk
Common thyme
Thymus vulgaris
16 – 30 Mar
10 May
8-10 wk
25 May
5 Jul
0 wk
Oregano
Origanum vulgare
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
0 wk
29 Jun
5 wk after
Parsley
Petroselinum crispum
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
0 wk
29 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
18 Feb – 18 Mar
21 Mar
10-14 wk
27 May
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
3 – 10 May
29 May
3-4 wk
31 May
19 Jun
1 wk after
Cornflower
Centaurea cyanus
25 May
15 Jul
0 wk
29 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
22 Mar – 5 Apr
21 Apr
8-10 wk
31 May
16 Jun
1 wk after
Sweet William
Dianthus barbatus
30 Mar – 13 Apr
6-8 wk
25 May
0 wk
10 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
5 – 19 Apr
5 May
6-8 wk
31 May
16 Jun
1 wk after
23 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 Apr
28 Apr
6-8 wk
5 Jun
9 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
20 Apr – 18 May
20 May
4-8 wk
15 Jun
17 Jun
3 wk after
15 Jun
3 wk after
Foxglove
Digitalis purpurea
16 – 30 Mar
8-10 wk
25 May
0 wk
15 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
15 Mar – 12 Apr
9 Jun
8-12 wk
7 Jun
4 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
5 – 19 Apr
15 May
6-8 wk
31 May
26 Jun
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
26 Apr – 10 May
4-6 wk
7 Jun
2 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
10 Apr
8-10 wk
27 May
5 Jun
0 wk
Love in a mist
Nigella damascena
25 May
30 Jun
0 wk
29 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
5 – 19 Apr
25 Apr
6-8 wk
31 May
6 Jun
1 wk after
23 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
10 Apr
8-12 wk
27 May
5 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
8 Mar – 5 Apr
21 Mar
8-12 wk
31 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
8 Mar – 5 Apr
14 Apr
8-12 wk
31 May
9 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
5 – 19 Apr
28 Apr
6-8 wk
31 May
9 Jun
1 wk after
Corn poppy
Papaver rhoeas
25 May
15 Jul
0 wk
29 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
2 – 30 Mar
10 May
8-12 wk
25 May
5 Jul
0 wk
10 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
29 Mar – 12 Apr
1 May
8-10 wk
7 Jun
26 Jun
2 wk after
Sweet pea
Lathyrus odoratus
30 Mar – 20 Apr
31 May
5-8 wk
25 May
5 Jul
0 wk
Stock
Matthiola incana
30 Mar – 13 Apr
3 Jun
6-8 wk
25 May
15 Jul
0 wk
15 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
30 Mar – 13 Apr
4 May
6-8 wk
25 May
15 Jun
0 wk
15 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
19 Apr – 3 May
7 May
4-6 wk
31 May
4 Jun
1 wk after
Garden pansy
Viola × wittrockiana
16 – 30 Mar
20 May
8-10 wk
25 May
15 Jul
0 wk
10 Jun
5 Jul
2 wk after
Petunia
Petunia
Fleece
8 Mar – 5 Apr
21 Apr
8-12 wk
31 May
16 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
24 Apr
6-8 wk
27 May
5 Jun
0 wk
13 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
19 Apr – 3 May
22 May
4-6 wk
31 May
19 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
26 Apr – 10 May
29 May
3-5 wk
31 May
19 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
19 Apr – 3 May
20 May
4-6 wk
31 May
17 Jun
1 wk after
29 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
15 Mar – 12 Apr
14 May
8-12 wk
7 Jun
9 Jul
2 wk after
Bee balm
Monarda didyma
2 – 30 Mar
20 Apr
8-12 wk
25 May
15 Jun
0 wk
29 Jun
5 wk after
Yarrow
Achillea millefolium
30 Mar – 13 Apr
4 Apr
6-8 wk
25 May
0 wk
15 Jun
3 wk after
Safflower
Carthamus tinctorius
25 May
15 Jun
0 wk
29 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
0 wk
7 May
25 Jun
3 wk before
Bishop's flower
Ammi majus
13 – 27 Apr
7 Jun
4-6 wk
25 May
5 Jul
0 wk
15 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
8 – 22 Mar
19 Mar
10-12 wk
31 May
1 wk after
Sunflower
Helianthus annuus
10 – 17 May
29 May
3-4 wk
7 Jun
19 Jun
2 wk after
29 Jun
5 wk after
China aster
Callistephus chinensis
12 – 26 Apr
18 May
6-8 wk
7 Jun
29 Jun
2 wk after
13 Jul
7 wk after
Annual phlox
Phlox drummondii
5 – 19 Apr
14 Apr
6-8 wk
31 May
1 wk after
13 Jul
7 wk after
Hollyhock
Alcea rosea
30 Mar – 13 Apr
6-8 wk
25 May
0 wk
15 Jun
3 wk after
Alpine delphinium
Delphinium elatum
2 – 30 Mar
20 Apr
8-12 wk
25 May
15 Jun
0 wk
29 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
5 – 19 Apr
15 May
6-8 wk
31 May
26 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
8 May
6-8 wk
27 May
19 Jun
0 wk
13 Jul
7 wk after
Wood sage
Salvia nemorosa
16 – 30 Mar
10 Apr
8-10 wk
25 May
5 Jun
0 wk
29 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
22 Mar – 19 Apr
8 May
6-10 wk
31 May
19 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
25 May
8 Jul
0 wk
29 May
28 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
29 Mar – 12 Apr
17 Apr
8-10 wk
7 Jun
12 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
30 Mar – 13 Apr
4 May
6-8 wk
25 May
15 Jun
0 wk
15 Jun
3 wk after