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