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