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Method
Rel. frost
Last spring frost (0°C) 15 May Frost 9 of 10 years · 20 years of data
Frost-free season 99 days 15 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)
27 Mar – 10 Apr
10 Jun
5-7 wk
15 May
15 Jul
0 wk
16 May
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
22 Jun
4-6 wk
15 May
20 Jul
0 wk
16 May
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
6 Jun
5-7 wk
15 May
11 Jul
0 wk
15 May
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
23 – 30 Apr
14 May
4-5 wk
28 May
11 Jun
2 wk after
9 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
26 May – 2 Jun
3-4 wk
23 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Fleece
20 Feb – 20 Mar
16 Mar
8-12 wk
15 May
0 wk
21 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
16 May
20 May
0 wk
16 May
0 wk
Maize
Zea mays
Season too short
17 – 24 Apr
3-4 wk
15 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
10 Jun
3-4 wk
17 May
1 Jul
0 wk
28 May
21 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
21 Jun
0 wk
15 May
11 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
6 Jun
5-7 wk
15 May
11 Jul
0 wk
15 May
1 Jul
0 wk
Potato
Solanum tuberosum
13 – 27 Apr
27 Apr
4-6 wk
25 May
25 May
1 wk after
25 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
6 Jun
5-7 wk
15 May
11 Jul
0 wk
16 May
1 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
23 – 30 Apr
3-4 wk
21 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
10 May
3-4 wk
17 May
31 May
0 wk
28 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
25 Jun
3-4 wk
15 May
16 Jul
0 wk
16 May
6 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
17 Apr – 1 May
12 May
2-4 wk
15 May
26 May
0 wk
15 May
16 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
16 May
20 May
0 wk
16 May
0 wk
Spinach
Spinacia oleracea
17 – 24 Apr
17 Jul
3-4 wk
15 May
7 Aug
0 wk
12 May
28 Jul
0 wk
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
17 Apr – 1 May
2-4 wk
15 May
0 wk
28 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
18 Jun
4-6 wk
15 May
16 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
10 Jun
3-4 wk
15 May
1 Jul
0 wk
16 May
21 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
9 – 23 Apr
4-6 wk
21 May
1 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
6 May
8-10 wk
15 May
1 Jul
0 wk
9 Jun
21 Jun
4 wk after
Dill
Anethum graveolens
16 May
1 Jul
0 wk
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
30 May
6-8 wk
15 May
11 Jul
0 wk
16 May
1 Jul
0 wk
Spearmint
Mentha spicata
20 Feb – 20 Mar
15 May
8-12 wk
15 May
10 Jul
0 wk
9 Jun
30 Jun
4 wk after
Coriander
Coriandrum sativum
15 May
21 Jul
0 wk
28 May
11 Jul
2 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
1 May
8-10 wk
17 May
26 Jun
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
6 May
8-10 wk
15 May
1 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
19 May
6-8 wk
15 May
30 Jun
0 wk
9 Jun
20 Jun
4 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
19 May
6-8 wk
15 May
30 Jun
0 wk
16 May
20 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
6 Feb – 6 Mar
17 Mar
10-14 wk
15 May
26 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
23 – 30 Apr
3-4 wk
21 May
1 wk after
Cornflower
Centaurea cyanus
15 May
10 Jul
0 wk
16 May
30 Jun
0 wk
Statice
Limonium sinuatum
Greenhouse
6 – 20 Mar
20 Mar
8-10 wk
15 May
15 May
0 wk
Sweet William
Dianthus barbatus
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
25 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
20 Mar – 3 Apr
3 Apr
6-8 wk
15 May
15 May
0 wk
16 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
20 Mar – 3 Apr
4 Apr
6-8 wk
15 May
16 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
26 Mar – 23 Apr
18 Apr
4-8 wk
21 May
1 wk after
21 May
1 wk after
Foxglove
Digitalis purpurea
6 – 20 Mar
8-10 wk
15 May
0 wk
28 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
26 Feb – 26 Mar
7 May
8-12 wk
21 May
2 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
20 Mar – 3 Apr
13 Apr
6-8 wk
15 May
25 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
4-6 wk
28 May
2 wk after
Chinese lantern
Physalis alkekengi
8 – 22 Mar
27 Mar
8-10 wk
17 May
22 May
0 wk
Love in a mist
Nigella damascena
15 May
16 Jun
0 wk
16 May
6 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
20 Mar – 3 Apr
24 Mar
6-8 wk
15 May
0 wk
16 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
22 Feb – 22 Mar
27 Mar
8-12 wk
17 May
22 May
0 wk
Cardoon
Cynara cardunculus
Season too short
20 Feb – 20 Mar
14 Mar
8-12 wk
15 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
26 Feb – 26 Mar
8-12 wk
21 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
26 Mar – 9 Apr
6-8 wk
21 May
1 wk after
Corn poppy
Papaver rhoeas
15 May
1 Jul
0 wk
16 May
21 Jun
0 wk
Snapdragon
Antirrhinum majus
20 Feb – 20 Mar
26 Apr
8-12 wk
15 May
21 Jun
0 wk
25 May
11 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
12 – 26 Mar
30 Mar
8-10 wk
21 May
25 May
1 wk after
Sweet pea
Lathyrus odoratus
20 Mar – 10 Apr
26 May
5-8 wk
15 May
30 Jun
0 wk
Stock
Matthiola incana
20 Mar – 3 Apr
20 May
6-8 wk
15 May
1 Jul
0 wk
28 May
21 Jun
2 wk after
Wormwood
Artemisia absinthium
20 Mar – 3 Apr
30 Apr
6-8 wk
15 May
11 Jun
0 wk
28 May
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
9 – 23 Apr
4-6 wk
21 May
1 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
16 May
8-10 wk
15 May
11 Jul
0 wk
25 May
1 Jul
1 wk after
Petunia
Petunia
Greenhouse
20 Feb – 20 Mar
20 Mar
8-12 wk
15 May
15 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
22 Mar – 5 Apr
10 Apr
6-8 wk
17 May
22 May
0 wk
27 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
3 – 17 Apr
19 Apr
4-6 wk
15 May
17 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
16 – 30 Apr
3-5 wk
21 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
3 – 17 Apr
18 Apr
4-6 wk
15 May
16 May
0 wk
28 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
5 Mar – 2 Apr
8-12 wk
28 May
2 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
6 Apr
8-12 wk
15 May
1 Jun
0 wk
9 Jun
4 wk after
Yarrow
Achillea millefolium
20 Mar – 3 Apr
31 Mar
6-8 wk
15 May
0 wk
28 May
2 wk after
Safflower
Carthamus tinctorius
15 May
8 Jun
0 wk
16 May
29 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
20 Mar – 3 Apr
20 May
6-8 wk
15 May
1 Jul
0 wk
29 Apr
21 Jun
2 wk before
Bishop's flower
Ammi majus
3 – 17 Apr
24 May
4-6 wk
15 May
21 Jun
0 wk
28 May
11 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
26 Feb – 12 Mar
10-12 wk
21 May
1 wk after
Sunflower
Helianthus annuus
Fleece
23 – 30 Apr
25 May
3-4 wk
21 May
15 Jun
1 wk after
28 May
5 Jun
2 wk after
China aster
Callistephus chinensis
2 – 16 Apr
29 Apr
6-8 wk
28 May
10 Jun
2 wk after
27 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
20 Mar – 3 Apr
13 Apr
6-8 wk
15 May
25 May
0 wk
28 May
2 wk after
Hollyhock
Alcea rosea
20 Mar – 3 Apr
6-8 wk
15 May
0 wk
28 May
2 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
6 Apr
8-12 wk
15 May
1 Jun
0 wk
9 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
20 Mar – 3 Apr
13 Apr
6-8 wk
15 May
25 May
0 wk
Black-eyed Susan
Rudbeckia hirta
22 Mar – 5 Apr
19 Apr
6-8 wk
17 May
31 May
0 wk
27 Jun
6 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
27 Mar
8-10 wk
15 May
22 May
0 wk
9 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
12 Mar – 9 Apr
6-10 wk
21 May
1 wk after
California goldenpoppy
Eschscholzia californica
15 May
25 Jun
0 wk
16 May
15 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
12 – 26 Mar
16 Apr
8-10 wk
21 May
11 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
20 Mar – 3 Apr
30 Apr
6-8 wk
15 May
11 Jun
0 wk
28 May
1 Jun
2 wk after