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Rel. frost
Last spring frost (0°C) 4 May Frost 9 of 10 years · 20 years of data
Frost-free season 136 days 4 May – 17 Sep
Probability that frost is over

10% = 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)
16 – 30 Mar
16 Jun
5-7 wk
4 May
21 Jul
0 wk
8 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
23 Mar – 6 Apr
28 Jun
4-6 wk
4 May
26 Jul
0 wk
8 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
24 Feb – 24 Mar
8-12 wk
19 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 – 30 Mar
11 Jun
5-7 wk
4 May
16 Jul
0 wk
4 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
21 – 28 Apr
3-4 wk
19 May
2 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 May
27 May
4-5 wk
16 Jun
24 Jun
6 wk after
22 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
24 – 31 May
3-4 wk
21 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
9 Feb – 9 Mar
23 Mar
8-12 wk
4 May
18 May
0 wk
25 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
7 Jun
1 wk after
8 May
28 May
1 wk after
Maize
Zea mays
Season too short
7 – 14 Apr
3-4 wk
5 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Apr
25 Jun
3-4 wk
12 May
16 Jul
1 wk after
25 May
6 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 May
6 Jul
0 wk
4 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 – 30 Mar
11 Jun
5-7 wk
4 May
16 Jul
0 wk
4 May
6 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
27 May
4-6 wk
20 May
24 Jun
2 wk after
20 May
14 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 – 30 Mar
21 Jun
5-7 wk
4 May
26 Jul
0 wk
8 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
21 – 28 Apr
12 May
3-4 wk
19 May
2 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Apr
8 Jun
3-4 wk
12 May
29 Jun
1 wk after
25 May
19 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Mar – 6 Apr
23 Jun
4-6 wk
4 May
21 Jul
0 wk
Lettuce
Lactuca sativa
6 – 13 Apr
10 Jul
3-4 wk
4 May
31 Jul
0 wk
8 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Mar – 6 Apr
23 Jun
4-6 wk
4 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Apr
31 May
2-4 wk
4 May
14 Jun
0 wk
4 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
7 Jun
1 wk after
8 May
28 May
1 wk after
Spinach
Spinacia oleracea
6 – 13 Apr
25 Jul
3-4 wk
4 May
15 Aug
0 wk
30 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
5 – 19 Jun
4-6 wk
17 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
10 – 24 Mar
6-8 wk
5 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
7 – 21 Apr
14 May
2-4 wk
5 May
28 May
0 wk
25 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Mar – 6 Apr
23 Jun
4-6 wk
4 May
21 Jul
0 wk
Garden pea
Pisum sativum
6 – 13 Apr
25 Jun
3-4 wk
4 May
16 Jul
0 wk
8 May
6 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
7 – 21 Apr
20 Apr
4-6 wk
19 May
2 wk after
Lemon balm
Melissa officinalis
23 Feb – 9 Mar
21 May
8-10 wk
4 May
16 Jul
0 wk
8 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
8 May
16 Jul
1 wk after
Wild chives
Allium schoenoprasum
9 – 23 Mar
4 Jun
6-8 wk
4 May
16 Jul
0 wk
8 May
6 Jul
1 wk after
Spearmint
Mentha spicata
9 Feb – 9 Mar
21 May
8-12 wk
4 May
16 Jul
0 wk
8 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
4 May
5 Aug
0 wk
25 May
26 Jul
3 wk after
Garden sage
Salvia officinalis
3 – 17 Mar
6 May
8-10 wk
12 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
23 Feb – 9 Mar
11 May
8-10 wk
4 May
6 Jul
0 wk
Oregano
Origanum vulgare
9 – 23 Mar
25 May
6-8 wk
4 May
6 Jul
0 wk
8 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
9 – 23 Mar
25 May
6-8 wk
4 May
6 Jul
0 wk
8 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
3 Feb – 3 Mar
26 Mar
10-14 wk
12 May
4 Jun
1 wk after

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
21 – 28 Apr
27 Apr
3-4 wk
19 May
2 wk after
Cornflower
Centaurea cyanus
4 May
16 Jul
0 wk
8 May
6 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
10 – 24 Mar
23 Mar
8-10 wk
19 May
2 wk after
Sweet William
Dianthus barbatus
9 – 23 Mar
6-8 wk
4 May
0 wk
20 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
24 Mar – 7 Apr
6 Apr
6-8 wk
19 May
2 wk after
2 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
17 – 31 Mar
15 Apr
6-8 wk
12 May
27 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
13 Apr – 11 May
4-8 wk
8 Jun
5 wk after
8 Jun
5 wk after
Foxglove
Digitalis purpurea
23 Feb – 9 Mar
8-10 wk
4 May
0 wk
25 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
8 Mar – 5 Apr
8 May
8-12 wk
31 May
3 Jul
4 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
24 Mar – 7 Apr
16 Apr
6-8 wk
19 May
28 May
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
19 Apr – 3 May
4-6 wk
31 May
4 wk after
Chinese lantern
Physalis alkekengi
3 – 17 Mar
11 Apr
8-10 wk
12 May
6 Jun
1 wk after
Love in a mist
Nigella damascena
4 May
1 Jul
0 wk
8 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Greenhouse
10 – 24 Mar
16 Apr
6-8 wk
5 May
28 May
0 wk
14 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
17 Feb – 17 Mar
11 Apr
8-12 wk
12 May
6 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
24 Feb – 24 Mar
22 Mar
8-12 wk
19 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
24 Feb – 24 Mar
13 Mar
8-12 wk
19 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
24 Mar – 7 Apr
27 Mar
6-8 wk
19 May
2 wk after
Corn poppy
Papaver rhoeas
4 May
16 Jul
0 wk
8 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
9 Feb – 9 Mar
11 May
8-12 wk
4 May
6 Jul
0 wk
20 May
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
22 Mar – 5 Apr
2 Apr
8-10 wk
31 May
4 wk after
Sweet pea
Lathyrus odoratus
9 – 30 Mar
1 Jun
5-8 wk
4 May
6 Jul
0 wk
Stock
Matthiola incana
9 – 23 Mar
4 Jun
6-8 wk
4 May
16 Jul
0 wk
25 May
6 Jul
3 wk after
Wormwood
Artemisia absinthium
9 – 23 Mar
5 May
6-8 wk
4 May
16 Jun
0 wk
25 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
7 – 21 Apr
4-6 wk
19 May
2 wk after
Garden pansy
Viola × wittrockiana
23 Feb – 9 Mar
21 May
8-10 wk
4 May
16 Jul
0 wk
20 May
6 Jul
2 wk after
Petunia
Petunia
Fleece
24 Feb – 24 Mar
23 Mar
8-12 wk
19 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
17 – 31 Mar
25 Apr
6-8 wk
12 May
6 Jun
1 wk after
22 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
7 – 21 Apr
20 Apr
4-6 wk
19 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
14 – 28 Apr
27 Apr
3-5 wk
19 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
7 – 21 Apr
29 Apr
4-6 wk
19 May
27 May
2 wk after
8 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
8 Mar – 5 Apr
12 Apr
8-12 wk
31 May
7 Jun
4 wk after
Bee balm
Monarda didyma
9 Feb – 9 Mar
21 Apr
8-12 wk
4 May
16 Jun
0 wk
8 Jun
5 wk after
Yarrow
Achillea millefolium
9 – 23 Mar
5 Apr
6-8 wk
4 May
17 May
0 wk
25 May
3 wk after
Safflower
Carthamus tinctorius
4 May
16 Jun
0 wk
8 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
9 – 23 Mar
25 May
6-8 wk
4 May
6 Jul
0 wk
16 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
8 Jun
4-6 wk
4 May
6 Jul
0 wk
25 May
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
24 Feb – 10 Mar
26 Feb
10-12 wk
19 May
2 wk after
Sunflower
Helianthus annuus
3 – 10 May
3 Jun
3-4 wk
31 May
24 Jun
4 wk after
8 Jun
14 Jun
5 wk after
China aster
Callistephus chinensis
5 – 19 Apr
23 May
6-8 wk
31 May
4 Jul
4 wk after
22 Jun
24 Jun
7 wk after
Annual phlox
Phlox drummondii
Fleece
10 – 24 Mar
16 Apr
6-8 wk
5 May
28 May
0 wk
8 Jun
5 wk after
Hollyhock
Alcea rosea
9 – 23 Mar
6-8 wk
4 May
0 wk
25 May
3 wk after
Alpine delphinium
Delphinium elatum
9 Feb – 9 Mar
21 Apr
8-12 wk
4 May
16 Jun
0 wk
8 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
24 Mar – 7 Apr
16 Apr
6-8 wk
19 May
28 May
2 wk after
Black-eyed Susan
Rudbeckia hirta
17 – 31 Mar
13 May
6-8 wk
12 May
24 Jun
1 wk after
22 Jun
7 wk after
Wood sage
Salvia nemorosa
23 Feb – 9 Mar
11 Apr
8-10 wk
4 May
6 Jun
0 wk
8 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
10 Mar – 7 Apr
6 Apr
6-10 wk
19 May
2 wk after
California goldenpoppy
Eschscholzia californica
4 May
14 Jul
0 wk
8 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
29 Apr
8-10 wk
31 May
24 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Mar
5 May
6-8 wk
4 May
16 Jun
0 wk
25 May
6 Jun
3 wk after