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