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Method
Rel. frost
Last spring frost (0°C) 16 May Frost 9 of 10 years · 20 years of data
Frost-free season 107 days 16 May – 31 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)
28 Mar – 11 Apr
13 Jun
5-7 wk
16 May
18 Jul
0 wk
17 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Apr
25 Jun
4-6 wk
16 May
23 Jul
0 wk
17 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Mar – 11 Apr
8 Jun
5-7 wk
16 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
29 Apr – 6 May
3-4 wk
27 May
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
1 – 8 May
19 May
4-5 wk
5 Jun
16 Jun
3 wk after
10 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Feb – 21 Mar
9 Mar
8-12 wk
16 May
0 wk
29 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 May
24 May
0 wk
17 May
0 wk
Maize
Zea mays
Season too short
22 – 29 Apr
3-4 wk
20 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Apr – 1 May
15 Jun
3-4 wk
22 May
6 Jul
1 wk after
29 May
26 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
16 May
25 Jun
0 wk
16 May
15 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Mar – 11 Apr
8 Jun
5-7 wk
16 May
13 Jul
0 wk
16 May
3 Jul
0 wk
Potato
Solanum tuberosum
14 – 28 Apr
5 May
4-6 wk
26 May
2 Jun
1 wk after
26 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Mar – 11 Apr
10 Jun
5-7 wk
16 May
15 Jul
0 wk
17 May
5 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
29 Apr – 6 May
3-4 wk
27 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Apr – 1 May
8 May
3-4 wk
22 May
29 May
1 wk after
29 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Apr
20 Jun
4-6 wk
16 May
18 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Apr
29 Jun
3-4 wk
16 May
20 Jul
0 wk
17 May
10 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
20 Jun
4-6 wk
16 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
18 Apr – 2 May
16 May
2-4 wk
16 May
30 May
0 wk
16 May
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 May
24 May
0 wk
17 May
0 wk
Spinach
Spinacia oleracea
18 – 25 Apr
22 Jul
3-4 wk
16 May
12 Aug
0 wk
13 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
10 – 24 Jun
4-6 wk
22 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
22 Apr – 6 May
2-4 wk
20 May
1 wk after
29 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Apr
20 Jun
4-6 wk
16 May
18 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Apr
14 Jun
3-4 wk
16 May
5 Jul
0 wk
17 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
15 – 29 Apr
4-6 wk
27 May
2 wk after
Lemon balm
Melissa officinalis
7 – 21 Mar
10 May
8-10 wk
16 May
5 Jul
0 wk
10 Jun
25 Jun
4 wk after
Dill
Anethum graveolens
17 May
6 Jul
0 wk
Wild chives
Allium schoenoprasum
21 Mar – 4 Apr
1 Jun
6-8 wk
16 May
13 Jul
0 wk
17 May
3 Jul
0 wk
Spearmint
Mentha spicata
21 Feb – 21 Mar
18 May
8-12 wk
16 May
13 Jul
0 wk
10 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
16 May
26 Jul
0 wk
29 May
16 Jul
2 wk after
Garden sage
Salvia officinalis
13 – 27 Mar
3 May
8-10 wk
22 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
7 – 21 Mar
8 May
8-10 wk
16 May
3 Jul
0 wk
Oregano
Origanum vulgare
21 Mar – 4 Apr
22 May
6-8 wk
16 May
3 Jul
0 wk
10 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
21 Mar – 4 Apr
22 May
6-8 wk
16 May
3 Jul
0 wk
17 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
13 Feb – 13 Mar
8 Mar
10-14 wk
22 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
29 Apr – 6 May
3-4 wk
27 May
2 wk after
Cornflower
Centaurea cyanus
16 May
13 Jul
0 wk
17 May
3 Jul
0 wk
Statice
Limonium sinuatum
Season too short
11 – 25 Mar
15 Mar
8-10 wk
20 May
1 wk after
Sweet William
Dianthus barbatus
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
26 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
25 Mar – 8 Apr
29 Mar
6-8 wk
20 May
1 wk after
17 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
21 Mar – 4 Apr
13 Apr
6-8 wk
16 May
25 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
3 Apr – 1 May
6 Apr
4-8 wk
29 May
2 wk after
29 May
2 wk after
Foxglove
Digitalis purpurea
7 – 21 Mar
8-10 wk
16 May
0 wk
29 May
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
4 Mar – 1 Apr
4 May
8-12 wk
27 May
29 Jun
2 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
25 Mar – 8 Apr
8 Apr
6-8 wk
20 May
20 May
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
24 Apr – 8 May
4-6 wk
5 Jun
3 wk after
Chinese lantern
Physalis alkekengi
13 – 27 Mar
1 Apr
8-10 wk
22 May
27 May
1 wk after
Love in a mist
Nigella damascena
16 May
20 Jun
0 wk
17 May
10 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
25 Mar – 8 Apr
6-8 wk
20 May
1 wk after
17 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
27 Feb – 27 Mar
1 Apr
8-12 wk
22 May
27 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
25 Feb – 25 Mar
19 Mar
8-12 wk
20 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
4 Mar – 1 Apr
8-12 wk
27 May
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
1 – 15 Apr
6-8 wk
27 May
2 wk after
Corn poppy
Papaver rhoeas
16 May
5 Jul
0 wk
17 May
25 Jun
0 wk
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
30 Apr
8-12 wk
16 May
25 Jun
0 wk
26 May
15 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
18 Mar – 1 Apr
25 Mar
8-10 wk
27 May
2 wk after
Sweet pea
Lathyrus odoratus
21 Mar – 11 Apr
29 May
5-8 wk
16 May
3 Jul
0 wk
Stock
Matthiola incana
21 Mar – 4 Apr
24 May
6-8 wk
16 May
5 Jul
0 wk
29 May
25 Jun
2 wk after
Wormwood
Artemisia absinthium
21 Mar – 4 Apr
2 May
6-8 wk
16 May
13 Jun
0 wk
29 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
15 – 29 Apr
4-6 wk
27 May
2 wk after
Garden pansy
Viola × wittrockiana
7 – 21 Mar
18 May
8-10 wk
16 May
13 Jul
0 wk
26 May
3 Jul
1 wk after
Petunia
Petunia
Season too short
25 Feb – 25 Mar
15 Mar
8-12 wk
20 May
1 wk after
Sweet Scabious
Scabiosa atropurpurea
27 Mar – 10 Apr
15 Apr
6-8 wk
22 May
27 May
1 wk after
28 Jun
6 wk after
Common zinnia
Zinnia elegans
Greenhouse
8 – 22 Apr
16 Apr
4-6 wk
20 May
1 wk after
Common morning glory
Ipomoea purpurea
Season too short
22 Apr – 6 May
3-5 wk
27 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
8 – 22 Apr
27 Apr
4-6 wk
20 May
25 May
1 wk after
29 May
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
13 Mar – 10 Apr
8-12 wk
5 Jun
3 wk after
Bee balm
Monarda didyma
21 Feb – 21 Mar
10 Apr
8-12 wk
16 May
5 Jun
0 wk
10 Jun
4 wk after
Yarrow
Achillea millefolium
21 Mar – 4 Apr
2 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Safflower
Carthamus tinctorius
16 May
13 Jun
0 wk
17 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
21 Mar – 4 Apr
22 May
6-8 wk
16 May
3 Jul
0 wk
30 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
4 – 18 Apr
28 May
4-6 wk
16 May
25 Jun
0 wk
29 May
15 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
4 – 18 Mar
10-12 wk
27 May
2 wk after
Sunflower
Helianthus annuus
8 – 15 May
16 May
3-4 wk
5 Jun
6 Jun
3 wk after
10 Jun
4 wk after
China aster
Callistephus chinensis
10 – 24 Apr
5 May
6-8 wk
5 Jun
16 Jun
3 wk after
28 Jun
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
21 Mar – 4 Apr
8 Apr
6-8 wk
16 May
20 May
0 wk
29 May
2 wk after
Hollyhock
Alcea rosea
21 Mar – 4 Apr
6-8 wk
16 May
0 wk
29 May
2 wk after
Alpine delphinium
Delphinium elatum
21 Feb – 21 Mar
10 Apr
8-12 wk
16 May
5 Jun
0 wk
10 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
25 Mar – 8 Apr
8 Apr
6-8 wk
20 May
20 May
1 wk after
Black-eyed Susan
Rudbeckia hirta
27 Mar – 10 Apr
25 Apr
6-8 wk
22 May
6 Jun
1 wk after
28 Jun
6 wk after
Wood sage
Salvia nemorosa
7 – 21 Mar
31 Mar
8-10 wk
16 May
26 May
0 wk
10 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
18 Mar – 15 Apr
6-10 wk
27 May
2 wk after
California goldenpoppy
Eschscholzia californica
16 May
1 Jul
0 wk
17 May
21 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
18 Mar – 1 Apr
21 Apr
8-10 wk
27 May
16 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
21 Mar – 4 Apr
2 May
6-8 wk
16 May
13 Jun
0 wk
29 May
3 Jun
2 wk after