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Method
Rel. frost
Last spring frost (0°C) 14 May Frost 9 of 10 years · 20 years of data
Frost-free season 105 days 14 May – 27 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)
26 Mar – 9 Apr
14 Jun
5-7 wk
14 May
19 Jul
0 wk
18 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
2 – 16 Apr
26 Jun
4-6 wk
14 May
24 Jul
0 wk
18 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
26 Mar – 9 Apr
9 Jun
5-7 wk
14 May
14 Jul
0 wk
14 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
29 Apr – 6 May
18 May
4-5 wk
3 Jun
15 Jun
3 wk after
18 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
27 May – 3 Jun
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
19 Feb – 19 Mar
14 Mar
8-12 wk
14 May
0 wk
4 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 May
29 May
1 wk after
18 May
19 May
1 wk after
Maize
Zea mays
Season too short
18 – 25 Apr
3-4 wk
16 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
21 – 28 Apr
14 Jun
3-4 wk
19 May
5 Jul
1 wk after
4 Jun
25 Jun
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
14 May
25 Jun
0 wk
14 May
15 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
26 Mar – 9 Apr
9 Jun
5-7 wk
14 May
14 Jul
0 wk
14 May
4 Jul
0 wk
Potato
Solanum tuberosum
18 Apr – 2 May
13 May
4-6 wk
30 May
10 Jun
2 wk after
30 May
31 May
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
26 Mar – 9 Apr
10 Jun
5-7 wk
14 May
15 Jul
0 wk
18 May
5 Jul
1 wk after
Pumpkin
Cucurbita pepo
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
21 – 28 Apr
17 May
3-4 wk
19 May
7 Jun
1 wk after
4 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
2 – 16 Apr
21 Jun
4-6 wk
14 May
19 Jul
0 wk
Lettuce
Lactuca sativa
16 – 23 Apr
29 Jun
3-4 wk
14 May
20 Jul
0 wk
18 May
10 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
2 – 16 Apr
21 Jun
4-6 wk
14 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 – 30 Apr
17 May
2-4 wk
14 May
31 May
0 wk
14 May
21 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 May
29 May
1 wk after
18 May
19 May
1 wk after
Spinach
Spinacia oleracea
16 – 23 Apr
23 Jul
3-4 wk
14 May
13 Aug
0 wk
10 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
18 Apr – 2 May
2-4 wk
16 May
0 wk
4 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
2 – 16 Apr
21 Jun
4-6 wk
14 May
19 Jul
0 wk
Garden pea
Pisum sativum
16 – 23 Apr
14 Jun
3-4 wk
14 May
5 Jul
0 wk
18 May
25 Jun
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
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Lemon balm
Melissa officinalis
5 – 19 Mar
10 May
8-10 wk
14 May
5 Jul
0 wk
18 Jun
25 Jun
5 wk after
Dill
Anethum graveolens
18 May
5 Jul
1 wk after
Wild chives
Allium schoenoprasum
19 Mar – 2 Apr
2 Jun
6-8 wk
14 May
14 Jul
0 wk
18 May
4 Jul
1 wk after
Spearmint
Mentha spicata
19 Feb – 19 Mar
19 May
8-12 wk
14 May
14 Jul
0 wk
18 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
14 May
25 Jul
0 wk
4 Jun
15 Jul
3 wk after
Garden sage
Salvia officinalis
10 – 24 Mar
4 May
8-10 wk
19 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
5 – 19 Mar
9 May
8-10 wk
14 May
4 Jul
0 wk
Oregano
Origanum vulgare
19 Mar – 2 Apr
23 May
6-8 wk
14 May
4 Jul
0 wk
18 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
19 Mar – 2 Apr
23 May
6-8 wk
14 May
4 Jul
0 wk
18 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
10 Feb – 10 Mar
10 Mar
10-14 wk
19 May
19 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
Season too short
26 Apr – 3 May
3-4 wk
24 May
1 wk after
Cornflower
Centaurea cyanus
14 May
14 Jul
0 wk
18 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Greenhouse
7 – 21 Mar
19 Mar
8-10 wk
16 May
0 wk
Sweet William
Dianthus barbatus
19 Mar – 2 Apr
6-8 wk
14 May
0 wk
30 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
21 Mar – 4 Apr
2 Apr
6-8 wk
16 May
0 wk
24 Jun
6 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
19 Mar – 2 Apr
9 Apr
6-8 wk
14 May
21 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
9 Apr – 7 May
11 Apr
4-8 wk
4 Jun
3 wk after
4 Jun
3 wk after
Foxglove
Digitalis purpurea
5 – 19 Mar
8-10 wk
14 May
0 wk
4 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
1 – 29 Mar
9 May
8-12 wk
24 May
4 Jul
1 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
21 Mar – 4 Apr
12 Apr
6-8 wk
16 May
24 May
0 wk
Hyacinth bean
Dolichos lablab
Season too short
22 Apr – 6 May
4-6 wk
3 Jun
3 wk after
Chinese lantern
Physalis alkekengi
10 – 24 Mar
31 Mar
8-10 wk
19 May
26 May
1 wk after
Love in a mist
Nigella damascena
14 May
20 Jun
0 wk
18 May
10 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Season too short
21 Mar – 4 Apr
23 Mar
6-8 wk
16 May
0 wk
24 Jun
6 wk after
Purple-top vervain
Verbena bonariensis
24 Feb – 24 Mar
31 Mar
8-12 wk
19 May
26 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
21 Feb – 21 Mar
20 Mar
8-12 wk
16 May
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
1 – 29 Mar
8-12 wk
24 May
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
29 Mar – 12 Apr
6-8 wk
24 May
1 wk after
Corn poppy
Papaver rhoeas
14 May
5 Jul
0 wk
18 May
25 Jun
1 wk after
Snapdragon
Antirrhinum majus
19 Feb – 19 Mar
30 Apr
8-12 wk
14 May
25 Jun
0 wk
30 May
15 Jun
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
15 – 29 Mar
29 Mar
8-10 wk
24 May
24 May
1 wk after
Sweet pea
Lathyrus odoratus
19 Mar – 9 Apr
30 May
5-8 wk
14 May
4 Jul
0 wk
Stock
Matthiola incana
19 Mar – 2 Apr
24 May
6-8 wk
14 May
5 Jul
0 wk
4 Jun
25 Jun
3 wk after
Wormwood
Artemisia absinthium
19 Mar – 2 Apr
3 May
6-8 wk
14 May
14 Jun
0 wk
4 Jun
4 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
12 – 26 Apr
4-6 wk
24 May
1 wk after
Garden pansy
Viola × wittrockiana
5 – 19 Mar
19 May
8-10 wk
14 May
14 Jul
0 wk
30 May
4 Jul
2 wk after
Petunia
Petunia
Greenhouse
21 Feb – 21 Mar
19 Mar
8-12 wk
16 May
0 wk
Sweet Scabious
Scabiosa atropurpurea
24 Mar – 7 Apr
14 Apr
6-8 wk
19 May
26 May
1 wk after
2 Jul
7 wk after
Common zinnia
Zinnia elegans
Greenhouse
4 – 18 Apr
21 Apr
4-6 wk
16 May
19 May
0 wk
Common morning glory
Ipomoea purpurea
Season too short
19 Apr – 3 May
3-5 wk
24 May
1 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
4 – 18 Apr
23 Apr
4-6 wk
16 May
21 May
0 wk
4 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
11 Mar – 8 Apr
8-12 wk
3 Jun
3 wk after
Bee balm
Monarda didyma
19 Feb – 19 Mar
10 Apr
8-12 wk
14 May
5 Jun
0 wk
18 Jun
5 wk after
Yarrow
Achillea millefolium
19 Mar – 2 Apr
3 Apr
6-8 wk
14 May
15 May
0 wk
4 Jun
3 wk after
Safflower
Carthamus tinctorius
14 May
14 Jun
0 wk
18 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
19 Mar – 2 Apr
23 May
6-8 wk
14 May
4 Jul
0 wk
26 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
2 – 16 Apr
28 May
4-6 wk
14 May
25 Jun
0 wk
4 Jun
15 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
1 – 15 Mar
10-12 wk
24 May
1 wk after
Sunflower
Helianthus annuus
6 – 13 May
18 May
3-4 wk
3 Jun
8 Jun
3 wk after
18 Jun
5 wk after
China aster
Callistephus chinensis
8 – 22 Apr
7 May
6-8 wk
3 Jun
18 Jun
3 wk after
2 Jul
7 wk after
Annual phlox
Phlox drummondii
Greenhouse
19 Mar – 2 Apr
12 Apr
6-8 wk
14 May
24 May
0 wk
4 Jun
3 wk after
Hollyhock
Alcea rosea
19 Mar – 2 Apr
6-8 wk
14 May
0 wk
4 Jun
3 wk after
Alpine delphinium
Delphinium elatum
19 Feb – 19 Mar
10 Apr
8-12 wk
14 May
5 Jun
0 wk
18 Jun
5 wk after
African marigold
Tagetes erecta
Greenhouse
21 Mar – 4 Apr
12 Apr
6-8 wk
16 May
24 May
0 wk
Black-eyed Susan
Rudbeckia hirta
24 Mar – 7 Apr
27 Apr
6-8 wk
19 May
8 Jun
1 wk after
2 Jul
7 wk after
Wood sage
Salvia nemorosa
5 – 19 Mar
31 Mar
8-10 wk
14 May
26 May
0 wk
18 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
15 Mar – 12 Apr
6-10 wk
24 May
1 wk after
California goldenpoppy
Eschscholzia californica
14 May
3 Jul
0 wk
18 May
23 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
15 – 29 Mar
20 Apr
8-10 wk
24 May
15 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
19 Mar – 2 Apr
3 May
6-8 wk
14 May
14 Jun
0 wk
4 Jun
4 Jun
3 wk after