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Rel. frost
Last spring frost (0°C) 6 May Frost 9 of 10 years · 20 years of data
Frost-free season 138 days 6 May – 21 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)
18 Mar – 1 Apr
13 Jun
5-7 wk
6 May
18 Jul
0 wk
7 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
25 Mar – 8 Apr
25 Jun
4-6 wk
6 May
23 Jul
0 wk
7 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
22 Feb – 22 Mar
8-12 wk
17 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
18 Mar – 1 Apr
8 Jun
5-7 wk
6 May
13 Jul
0 wk
6 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
19 – 26 Apr
3-4 wk
17 May
2 wk after
Florence Fennel
Foeniculum vulgare
5 – 12 May
20 May
4-5 wk
9 Jun
17 Jun
5 wk after
18 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
19 – 26 May
3-4 wk
16 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
11 Feb – 11 Mar
24 Mar
8-12 wk
6 May
19 May
0 wk
19 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
7 May
8 Jun
0 wk
7 May
29 May
0 wk
Maize
Zea mays
Season too short
12 – 19 Apr
3-4 wk
10 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Apr
24 Jun
3-4 wk
12 May
15 Jul
1 wk after
19 May
5 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
6 May
3 Jul
0 wk
6 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
18 Mar – 1 Apr
8 Jun
5-7 wk
6 May
13 Jul
0 wk
6 May
3 Jul
0 wk
Potato
Solanum tuberosum
4 – 18 Apr
21 May
4-6 wk
16 May
18 Jun
1 wk after
16 May
8 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
18 Mar – 1 Apr
18 Jun
5-7 wk
6 May
23 Jul
0 wk
7 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
19 – 26 Apr
16 May
3-4 wk
17 May
6 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Apr
23 May
3-4 wk
12 May
13 Jun
1 wk after
19 May
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
25 Mar – 8 Apr
20 Jun
4-6 wk
6 May
18 Jul
0 wk
Lettuce
Lactuca sativa
8 – 15 Apr
7 Jul
3-4 wk
6 May
28 Jul
0 wk
7 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
25 Mar – 8 Apr
20 Jun
4-6 wk
6 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
8 – 22 Apr
29 May
2-4 wk
6 May
12 Jun
0 wk
6 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
7 May
8 Jun
0 wk
7 May
29 May
0 wk
Spinach
Spinacia oleracea
8 – 15 Apr
22 Jul
3-4 wk
6 May
12 Aug
0 wk
3 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
31 May – 14 Jun
4-6 wk
12 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
15 – 29 Mar
6-8 wk
10 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
12 – 26 Apr
18 May
2-4 wk
10 May
1 Jun
1 wk after
19 May
22 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
25 Mar – 8 Apr
20 Jun
4-6 wk
6 May
18 Jul
0 wk
Garden pea
Pisum sativum
8 – 15 Apr
22 Jun
3-4 wk
6 May
13 Jul
0 wk
7 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
5 – 19 Apr
24 Apr
4-6 wk
17 May
22 May
2 wk after
Lemon balm
Melissa officinalis
25 Feb – 11 Mar
18 May
8-10 wk
6 May
13 Jul
0 wk
31 May
3 Jul
4 wk after
Dill
Anethum graveolens
7 May
15 Jul
0 wk
Wild chives
Allium schoenoprasum
11 – 25 Mar
1 Jun
6-8 wk
6 May
13 Jul
0 wk
7 May
3 Jul
0 wk
Spearmint
Mentha spicata
11 Feb – 11 Mar
18 May
8-12 wk
6 May
13 Jul
0 wk
31 May
3 Jul
4 wk after
Coriander
Coriandrum sativum
6 May
4 Aug
0 wk
19 May
25 Jul
2 wk after
Garden sage
Salvia officinalis
3 – 17 Mar
3 May
8-10 wk
12 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
25 Feb – 11 Mar
8 May
8-10 wk
6 May
3 Jul
0 wk
Oregano
Origanum vulgare
11 – 25 Mar
22 May
6-8 wk
6 May
3 Jul
0 wk
31 May
23 Jun
4 wk after
Parsley
Petroselinum crispum
11 – 25 Mar
22 May
6-8 wk
6 May
3 Jul
0 wk
7 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
3 Feb – 3 Mar
19 Mar
10-14 wk
12 May
28 May
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
19 – 26 Apr
1 May
3-4 wk
17 May
22 May
2 wk after
Cornflower
Centaurea cyanus
6 May
13 Jul
0 wk
7 May
3 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
1 – 15 Mar
2 Apr
8-10 wk
10 May
28 May
1 wk after
Sweet William
Dianthus barbatus
11 – 25 Mar
6-8 wk
6 May
0 wk
16 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
15 – 29 Mar
16 Apr
6-8 wk
10 May
28 May
1 wk after
7 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
17 – 31 Mar
12 Apr
6-8 wk
12 May
24 May
1 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
5 Apr – 3 May
14 Apr
4-8 wk
31 May
4 wk after
31 May
4 wk after
Foxglove
Digitalis purpurea
25 Feb – 11 Mar
8-10 wk
6 May
0 wk
19 May
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
3 – 31 Mar
12 May
8-12 wk
26 May
7 Jul
3 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
22 Mar – 5 Apr
12 Apr
6-8 wk
17 May
24 May
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
14 – 28 Apr
4-6 wk
26 May
3 wk after
Chinese lantern
Physalis alkekengi
3 – 17 Mar
10 Apr
8-10 wk
12 May
5 Jun
1 wk after
Love in a mist
Nigella damascena
6 May
28 Jun
0 wk
7 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Greenhouse
15 – 29 Mar
6 Apr
6-8 wk
10 May
18 May
1 wk after
7 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
17 Feb – 17 Mar
10 Apr
8-12 wk
12 May
5 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
22 Feb – 22 Mar
19 Mar
8-12 wk
17 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
22 Feb – 22 Mar
17 Mar
8-12 wk
17 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
22 Mar – 5 Apr
31 Mar
6-8 wk
17 May
2 wk after
Corn poppy
Papaver rhoeas
6 May
13 Jul
0 wk
7 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
11 Feb – 11 Mar
8 May
8-12 wk
6 May
3 Jul
0 wk
16 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
8 – 22 Mar
12 Apr
8-10 wk
17 May
7 Jun
2 wk after
Sweet pea
Lathyrus odoratus
11 Mar – 1 Apr
29 May
5-8 wk
6 May
3 Jul
0 wk
Stock
Matthiola incana
11 – 25 Mar
1 Jun
6-8 wk
6 May
13 Jul
0 wk
19 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
11 – 25 Mar
2 May
6-8 wk
6 May
13 Jun
0 wk
19 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
5 – 19 Apr
9 Apr
4-6 wk
17 May
2 wk after
Garden pansy
Viola × wittrockiana
25 Feb – 11 Mar
18 May
8-10 wk
6 May
13 Jul
0 wk
16 May
3 Jul
1 wk after
Petunia
Petunia
Greenhouse
15 Feb – 15 Mar
2 Apr
8-12 wk
10 May
28 May
1 wk after
Sweet Scabious
Scabiosa atropurpurea
17 – 31 Mar
24 Apr
6-8 wk
12 May
5 Jun
1 wk after
18 Jun
6 wk after
Common zinnia
Zinnia elegans
Fleece
5 – 19 Apr
24 Apr
4-6 wk
17 May
22 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
12 – 26 Apr
1 May
3-5 wk
17 May
22 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
5 – 19 Apr
26 Apr
4-6 wk
17 May
24 May
2 wk after
31 May
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
3 – 31 Mar
16 Apr
8-12 wk
26 May
11 Jun
3 wk after
Bee balm
Monarda didyma
11 Feb – 11 Mar
18 Apr
8-12 wk
6 May
13 Jun
0 wk
31 May
3 Jun
4 wk after
Yarrow
Achillea millefolium
11 – 25 Mar
2 Apr
6-8 wk
6 May
14 May
0 wk
19 May
2 wk after
Safflower
Carthamus tinctorius
6 May
13 Jun
0 wk
7 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
11 – 25 Mar
22 May
6-8 wk
6 May
3 Jul
0 wk
20 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
25 Mar – 8 Apr
5 Jun
4-6 wk
6 May
3 Jul
0 wk
19 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
22 Feb – 8 Mar
23 Feb
10-12 wk
17 May
2 wk after
Sunflower
Helianthus annuus
28 Apr – 5 May
27 May
3-4 wk
26 May
17 Jun
3 wk after
31 May
7 Jun
4 wk after
China aster
Callistephus chinensis
31 Mar – 14 Apr
16 May
6-8 wk
26 May
27 Jun
3 wk after
18 Jun
6 wk after
Annual phlox
Phlox drummondii
Fleece
15 – 29 Mar
12 Apr
6-8 wk
10 May
24 May
1 wk after
31 May
4 wk after
Hollyhock
Alcea rosea
11 – 25 Mar
6-8 wk
6 May
0 wk
19 May
2 wk after
Alpine delphinium
Delphinium elatum
11 Feb – 11 Mar
18 Apr
8-12 wk
6 May
13 Jun
0 wk
31 May
3 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
22 Mar – 5 Apr
12 Apr
6-8 wk
17 May
24 May
2 wk after
Black-eyed Susan
Rudbeckia hirta
17 – 31 Mar
6 May
6-8 wk
12 May
17 Jun
1 wk after
18 Jun
6 wk after
Wood sage
Salvia nemorosa
25 Feb – 11 Mar
8 Apr
8-10 wk
6 May
3 Jun
0 wk
31 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
8 Mar – 5 Apr
10 Apr
6-10 wk
17 May
22 May
2 wk after
California goldenpoppy
Eschscholzia californica
6 May
13 Jul
0 wk
7 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
17 – 31 Mar
22 Apr
8-10 wk
26 May
17 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
11 – 25 Mar
2 May
6-8 wk
6 May
13 Jun
0 wk
19 May
3 Jun
2 wk after