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