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Method
Rel. frost
Last spring frost (0°C) 10 May Frost 9 of 10 years · 20 years of data
Frost-free season 104 days 10 May – 22 Aug
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)
22 Mar – 5 Apr
11 Jun
5-7 wk
10 May
16 Jul
0 wk
11 May
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
29 Mar – 12 Apr
23 Jun
4-6 wk
10 May
21 Jul
0 wk
11 May
11 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
25 Feb – 25 Mar
8-12 wk
20 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
22 Mar – 5 Apr
6 Jun
5-7 wk
10 May
11 Jul
0 wk
10 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
22 – 29 Apr
3-4 wk
20 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
25 Apr – 2 May
16 May
4-5 wk
30 May
13 Jun
3 wk after
4 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
23 – 30 May
3-4 wk
20 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
15 Feb – 15 Mar
5 Mar
8-12 wk
10 May
0 wk
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
11 May
20 May
0 wk
11 May
0 wk
Maize
Zea mays
Season too short
14 – 21 Apr
3-4 wk
12 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
17 – 24 Apr
12 Jun
3-4 wk
15 May
3 Jul
1 wk after
23 May
23 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
10 May
25 Jun
0 wk
10 May
15 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
22 Mar – 5 Apr
6 Jun
5-7 wk
10 May
11 Jul
0 wk
10 May
1 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
29 Apr
4-6 wk
20 May
27 May
1 wk after
20 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Mar – 5 Apr
10 Jun
5-7 wk
10 May
15 Jul
0 wk
11 May
5 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
22 – 29 Apr
3-4 wk
20 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
17 – 24 Apr
10 May
3-4 wk
15 May
31 May
1 wk after
23 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Mar – 12 Apr
18 Jun
4-6 wk
10 May
16 Jul
0 wk
Lettuce
Lactuca sativa
12 – 19 Apr
29 Jun
3-4 wk
10 May
20 Jul
0 wk
11 May
10 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
29 Mar – 12 Apr
18 Jun
4-6 wk
10 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Apr
13 May
2-4 wk
10 May
27 May
0 wk
10 May
17 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
11 May
20 May
0 wk
11 May
0 wk
Spinach
Spinacia oleracea
12 – 19 Apr
18 Jul
3-4 wk
10 May
8 Aug
0 wk
7 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
17 – 31 Mar
6-8 wk
12 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
14 – 28 Apr
2-4 wk
12 May
0 wk
23 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Mar – 12 Apr
18 Jun
4-6 wk
10 May
16 Jul
0 wk
Garden pea
Pisum sativum
12 – 19 Apr
14 Jun
3-4 wk
10 May
5 Jul
0 wk
11 May
25 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
Season too short
8 – 22 Apr
4-6 wk
20 May
1 wk after
Lemon balm
Melissa officinalis
1 – 15 Mar
10 May
8-10 wk
10 May
5 Jul
0 wk
4 Jun
25 Jun
4 wk after
Dill
Anethum graveolens
11 May
3 Jul
0 wk
Wild chives
Allium schoenoprasum
15 – 29 Mar
30 May
6-8 wk
10 May
11 Jul
0 wk
11 May
1 Jul
0 wk
Spearmint
Mentha spicata
15 Feb – 15 Mar
16 May
8-12 wk
10 May
11 Jul
0 wk
4 Jun
1 Jul
4 wk after
Coriander
Coriandrum sativum
10 May
23 Jul
0 wk
23 May
13 Jul
2 wk after
Garden sage
Salvia officinalis
6 – 20 Mar
1 May
8-10 wk
15 May
26 Jun
1 wk after
Common thyme
Thymus vulgaris
1 – 15 Mar
6 May
8-10 wk
10 May
1 Jul
0 wk
Oregano
Origanum vulgare
15 – 29 Mar
20 May
6-8 wk
10 May
1 Jul
0 wk
4 Jun
21 Jun
4 wk after
Parsley
Petroselinum crispum
15 – 29 Mar
20 May
6-8 wk
10 May
1 Jul
0 wk
11 May
21 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
1 Feb – 1 Mar
22 Mar
10-14 wk
10 May
31 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
Season too short
22 – 29 Apr
3-4 wk
20 May
1 wk after
Cornflower
Centaurea cyanus
10 May
11 Jul
0 wk
11 May
1 Jul
0 wk
Statice
Limonium sinuatum
Season too short
3 – 17 Mar
9 Mar
8-10 wk
12 May
0 wk
Sweet William
Dianthus barbatus
15 – 29 Mar
6-8 wk
10 May
0 wk
20 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
17 – 31 Mar
23 Mar
6-8 wk
12 May
0 wk
11 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
15 – 29 Mar
4 Apr
6-8 wk
10 May
16 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
21 Mar – 18 Apr
18 Apr
4-8 wk
16 May
16 May
1 wk after
16 May
1 wk after
Foxglove
Digitalis purpurea
1 – 15 Mar
8-10 wk
10 May
0 wk
23 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
25 Feb – 25 Mar
22 Apr
8-12 wk
20 May
17 Jun
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
17 – 31 Mar
2 Apr
6-8 wk
12 May
14 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
18 Apr – 2 May
4-6 wk
30 May
3 wk after
Chinese lantern
Physalis alkekengi
6 – 20 Mar
29 Mar
8-10 wk
15 May
24 May
1 wk after
Love in a mist
Nigella damascena
10 May
20 Jun
0 wk
11 May
10 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
17 – 31 Mar
6-8 wk
12 May
0 wk
11 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
20 Feb – 20 Mar
29 Mar
8-12 wk
15 May
24 May
1 wk after
Cardoon
Cynara cardunculus
Season too short
17 Feb – 17 Mar
15 Mar
8-12 wk
12 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
25 Feb – 25 Mar
8-12 wk
20 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
1 wk after
Corn poppy
Papaver rhoeas
10 May
5 Jul
0 wk
11 May
25 Jun
0 wk
Snapdragon
Antirrhinum majus
15 Feb – 15 Mar
30 Apr
8-12 wk
10 May
25 Jun
0 wk
20 May
15 Jun
1 wk after
Flossflower
Ageratum houstonianum
Season too short
11 – 25 Mar
19 Mar
8-10 wk
20 May
1 wk after
Sweet pea
Lathyrus odoratus
15 Mar – 5 Apr
27 May
5-8 wk
10 May
1 Jul
0 wk
Stock
Matthiola incana
15 – 29 Mar
24 May
6-8 wk
10 May
5 Jul
0 wk
23 May
25 Jun
2 wk after
Wormwood
Artemisia absinthium
15 – 29 Mar
30 Apr
6-8 wk
10 May
11 Jun
0 wk
23 May
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
8 – 22 Apr
4-6 wk
20 May
1 wk after
Garden pansy
Viola × wittrockiana
1 – 15 Mar
16 May
8-10 wk
10 May
11 Jul
0 wk
20 May
1 Jul
1 wk after
Petunia
Petunia
Season too short
17 Feb – 17 Mar
9 Mar
8-12 wk
12 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
20 Mar – 3 Apr
12 Apr
6-8 wk
15 May
24 May
1 wk after
22 Jun
6 wk after
Common zinnia
Zinnia elegans
Season too short
31 Mar – 14 Apr
4 Apr
4-6 wk
12 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
15 – 29 Apr
3-5 wk
20 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
31 Mar – 14 Apr
18 Apr
4-6 wk
12 May
16 May
0 wk
23 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
7 Mar – 4 Apr
7 Mar
8-12 wk
30 May
3 wk after
Bee balm
Monarda didyma
15 Feb – 15 Mar
10 Apr
8-12 wk
10 May
5 Jun
0 wk
4 Jun
4 wk after
Yarrow
Achillea millefolium
15 – 29 Mar
31 Mar
6-8 wk
10 May
12 May
0 wk
23 May
2 wk after
Safflower
Carthamus tinctorius
10 May
9 Jun
0 wk
11 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
15 – 29 Mar
20 May
6-8 wk
10 May
1 Jul
0 wk
24 Apr
21 Jun
2 wk before
Bishop's flower
Ammi majus
29 Mar – 12 Apr
28 May
4-6 wk
10 May
25 Jun
0 wk
23 May
15 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
25 Feb – 11 Mar
10-12 wk
20 May
1 wk after
Sunflower
Helianthus annuus
Fleece
22 – 29 Apr
30 May
3-4 wk
20 May
20 Jun
1 wk after
23 May
10 Jun
2 wk after
China aster
Callistephus chinensis
4 – 18 Apr
26 Apr
6-8 wk
30 May
7 Jun
3 wk after
22 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
15 – 29 Mar
2 Apr
6-8 wk
10 May
14 May
0 wk
23 May
2 wk after
Hollyhock
Alcea rosea
15 – 29 Mar
6-8 wk
10 May
0 wk
23 May
2 wk after
Alpine delphinium
Delphinium elatum
15 Feb – 15 Mar
10 Apr
8-12 wk
10 May
5 Jun
0 wk
4 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
17 – 31 Mar
2 Apr
6-8 wk
12 May
14 May
0 wk
Black-eyed Susan
Rudbeckia hirta
20 Mar – 3 Apr
16 Apr
6-8 wk
15 May
28 May
1 wk after
22 Jun
6 wk after
Wood sage
Salvia nemorosa
1 – 15 Mar
31 Mar
8-10 wk
10 May
26 May
0 wk
4 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
11 Mar – 8 Apr
6-10 wk
20 May
1 wk after
California goldenpoppy
Eschscholzia californica
10 May
30 Jun
0 wk
11 May
20 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
11 – 25 Mar
18 Apr
8-10 wk
20 May
13 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
15 – 29 Mar
30 Apr
6-8 wk
10 May
11 Jun
0 wk
23 May
1 Jun
2 wk after