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Method
Rel. frost
Last spring frost (0°C) 21 May Frost 9 of 10 years · 20 years of data
Frost-free season 100 days 21 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)
2 – 16 Apr
14 Jun
5-7 wk
21 May
19 Jul
0 wk
22 May
9 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
26 Jun
4-6 wk
21 May
24 Jul
0 wk
22 May
14 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
9 Mar – 6 Apr
8-12 wk
1 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
9 Jun
5-7 wk
21 May
14 Jul
0 wk
21 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
4 – 11 May
3-4 wk
1 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
Fleece
6 – 13 May
18 May
4-5 wk
10 Jun
15 Jun
3 wk after
15 Jun
4 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Feb – 26 Mar
15 Mar
8-12 wk
21 May
0 wk
3 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
30 May
0 wk
22 May
0 wk
Maize
Zea mays
Season too short
27 Apr – 4 May
3-4 wk
25 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
14 Jun
3-4 wk
27 May
5 Jul
1 wk after
3 Jun
25 Jun
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
28 Jun
0 wk
21 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
9 Jun
5-7 wk
21 May
14 Jul
0 wk
21 May
4 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
14 May
4-6 wk
31 May
11 Jun
1 wk after
31 May
1 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
13 Jun
5-7 wk
21 May
18 Jul
0 wk
22 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Season too short
4 – 11 May
3-4 wk
1 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Apr – 6 May
20 May
3-4 wk
27 May
10 Jun
1 wk after
3 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
21 Jun
4-6 wk
21 May
19 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
2 Jul
3-4 wk
21 May
23 Jul
0 wk
22 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
21 Jun
4-6 wk
21 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
21 May
2-4 wk
21 May
4 Jun
0 wk
21 May
25 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
30 May
0 wk
22 May
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
23 Jul
3-4 wk
21 May
13 Aug
0 wk
18 May
3 Aug
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
30 Mar – 13 Apr
6-8 wk
25 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Season too short
27 Apr – 11 May
2-4 wk
25 May
1 wk after
3 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
21 Jun
4-6 wk
21 May
19 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
17 Jun
3-4 wk
21 May
8 Jul
0 wk
22 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
20 Apr – 4 May
4-6 wk
1 Jun
2 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
13 May
8-10 wk
21 May
8 Jul
0 wk
15 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
22 May
5 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
2 Jun
6-8 wk
21 May
14 Jul
0 wk
22 May
4 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
19 May
8-12 wk
21 May
14 Jul
0 wk
15 Jun
4 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
25 Jul
0 wk
3 Jun
15 Jul
2 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
4 May
8-10 wk
27 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
12 – 26 Mar
9 May
8-10 wk
21 May
4 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
23 May
6-8 wk
21 May
4 Jul
0 wk
15 Jun
24 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
23 May
6-8 wk
21 May
4 Jul
0 wk
22 May
24 Jun
0 wk
Rosemary
Salvia rosmarinus
Fleece
12 Feb – 12 Mar
19 Mar
10-14 wk
21 May
28 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
4 – 11 May
3-4 wk
1 Jun
2 wk after
Cornflower
Centaurea cyanus
21 May
14 Jul
0 wk
22 May
4 Jul
0 wk
Statice
Limonium sinuatum
Season too short
16 – 30 Mar
18 Mar
8-10 wk
25 May
1 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Season too short
30 Mar – 13 Apr
1 Apr
6-8 wk
25 May
1 wk after
22 Jun
5 wk after
Pinnate dahlia
Dahlia × pinnata
Greenhouse
26 Mar – 9 Apr
11 Apr
6-8 wk
21 May
23 May
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
1 – 29 Apr
25 Apr
4-8 wk
27 May
1 wk after
27 May
1 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
9 Mar – 6 Apr
23 Apr
8-12 wk
1 Jun
18 Jun
2 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
30 Mar – 13 Apr
11 Apr
6-8 wk
25 May
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
29 Apr – 13 May
4-6 wk
10 Jun
3 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
31 Mar
8-10 wk
27 May
1 wk after
Love in a mist
Nigella damascena
21 May
23 Jun
0 wk
22 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Season too short
30 Mar – 13 Apr
6-8 wk
25 May
1 wk after
22 Jun
5 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
31 Mar
8-12 wk
27 May
1 wk after
Cardoon
Cynara cardunculus
Greenhouse
2 – 30 Mar
20 Mar
8-12 wk
25 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
9 Mar – 6 Apr
8-12 wk
1 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Season too short
6 – 20 Apr
6-8 wk
1 Jun
2 wk after
Corn poppy
Papaver rhoeas
21 May
8 Jul
0 wk
22 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
3 May
8-12 wk
21 May
28 Jun
0 wk
31 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
23 Mar – 6 Apr
28 Mar
8-10 wk
1 Jun
2 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
30 May
5-8 wk
21 May
4 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
27 May
6-8 wk
21 May
8 Jul
0 wk
3 Jun
28 Jun
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
3 May
6-8 wk
21 May
14 Jun
0 wk
3 Jun
4 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
20 Apr – 4 May
4-6 wk
1 Jun
2 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
19 May
8-10 wk
21 May
14 Jul
0 wk
31 May
4 Jul
1 wk after
Petunia
Petunia
Season too short
2 – 30 Mar
18 Mar
8-12 wk
25 May
1 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
14 Apr
6-8 wk
27 May
1 wk after
3 Jul
6 wk after
Common zinnia
Zinnia elegans
Season too short
13 – 27 Apr
4-6 wk
25 May
1 wk after
Common morning glory
Ipomoea purpurea
Season too short
27 Apr – 11 May
3-5 wk
1 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
Greenhouse
13 – 27 Apr
25 Apr
4-6 wk
25 May
1 wk after
3 Jun
2 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
18 Mar – 15 Apr
8-12 wk
10 Jun
3 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
13 Apr
8-12 wk
21 May
8 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
3 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
14 Jun
0 wk
22 May
4 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
23 May
6-8 wk
21 May
4 Jul
0 wk
5 May
24 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
31 May
4-6 wk
21 May
28 Jun
0 wk
3 Jun
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
9 – 23 Mar
10-12 wk
1 Jun
2 wk after
Sunflower
Helianthus annuus
Fleece
4 – 11 May
27 May
3-4 wk
1 Jun
17 Jun
2 wk after
3 Jun
7 Jun
2 wk after
China aster
Callistephus chinensis
15 – 29 Apr
27 Apr
6-8 wk
10 Jun
3 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
Greenhouse
26 Mar – 9 Apr
11 Apr
6-8 wk
21 May
23 May
0 wk
3 Jun
2 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
13 Apr
8-12 wk
21 May
8 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
Greenhouse
30 Mar – 13 Apr
11 Apr
6-8 wk
25 May
1 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
17 Apr
6-8 wk
27 May
29 May
1 wk after
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
3 Apr
8-10 wk
21 May
29 May
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
23 Mar – 20 Apr
6-10 wk
1 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
21 May
27 Jun
0 wk
22 May
17 Jun
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
23 Mar – 6 Apr
20 Apr
8-10 wk
1 Jun
15 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
3 May
6-8 wk
21 May
14 Jun
0 wk
3 Jun
4 Jun
2 wk after