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