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Method
Rel. frost
Last spring frost (0°C) 17 May Frost 1 of 10 years · 20 years of data
Frost-free season 154 days 17 May – 18 Oct
Probability that frost is over

90% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
29 Mar – 12 Apr
12 Jun
5-7 wk
17 May
17 Jul
0 wk
18 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
5 – 19 Apr
24 Jun
4-6 wk
17 May
22 Jul
0 wk
18 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Greenhouse
28 Feb – 28 Mar
2 Apr
8-12 wk
23 May
28 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
29 Mar – 12 Apr
7 Jun
5-7 wk
17 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
2 – 9 May
27 May
3-4 wk
30 May
17 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
14 – 21 May
4 Jun
4-5 wk
18 Jun
2 Jul
5 wk after
29 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
28 May – 4 Jun
3-4 wk
25 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
22 Feb – 22 Mar
28 Mar
8-12 wk
17 May
23 May
0 wk
30 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 May
12 Jun
0 wk
18 May
2 Jun
0 wk
Maize
Zea mays
Fleece
25 Apr – 2 May
17 May
3-4 wk
23 May
7 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
21 – 28 Apr
1 Jul
3-4 wk
19 May
22 Jul
0 wk
30 May
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
17 May
2 Jul
0 wk
17 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
29 Mar – 12 Apr
7 Jun
5-7 wk
17 May
12 Jul
0 wk
17 May
2 Jul
0 wk
Potato
Solanum tuberosum
15 – 29 Apr
3 Jun
4-6 wk
27 May
1 Jul
1 wk after
27 May
21 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
29 Mar – 12 Apr
17 Jun
5-7 wk
17 May
22 Jul
0 wk
18 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
21 – 28 May
1 Jun
3-4 wk
18 Jun
22 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
21 – 28 Apr
16 Jun
3-4 wk
19 May
7 Jul
0 wk
30 May
27 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Lettuce
Lactuca sativa
19 – 26 Apr
6 Jul
3-4 wk
17 May
27 Jul
0 wk
18 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
19 Apr – 3 May
29 May
2-4 wk
17 May
12 Jun
0 wk
17 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 May
12 Jun
0 wk
18 May
2 Jun
0 wk
Spinach
Spinacia oleracea
19 – 26 Apr
21 Jul
3-4 wk
17 May
11 Aug
0 wk
14 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
11 – 25 Jun
4-6 wk
23 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
28 Mar – 11 Apr
26 Apr
6-8 wk
23 May
7 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
2 – 16 May
3 Jun
2-4 wk
30 May
17 Jun
2 wk after
29 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
5 – 19 Apr
19 Jun
4-6 wk
17 May
17 Jul
0 wk
Garden pea
Pisum sativum
19 – 26 Apr
21 Jun
3-4 wk
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
7 – 21 May
10 May
4-6 wk
18 Jun
5 wk after
Lemon balm
Melissa officinalis
8 – 22 Mar
17 May
8-10 wk
17 May
12 Jul
0 wk
11 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
18 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
22 Mar – 5 Apr
31 May
6-8 wk
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Spearmint
Mentha spicata
22 Feb – 22 Mar
17 May
8-12 wk
17 May
12 Jul
0 wk
11 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
17 May
11 Aug
0 wk
30 May
1 Aug
2 wk after
Garden sage
Salvia officinalis
10 – 24 Mar
2 May
8-10 wk
19 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
8 – 22 Mar
7 May
8-10 wk
17 May
2 Jul
0 wk
Oregano
Origanum vulgare
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
11 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
18 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
10 Feb – 10 Mar
3 Apr
10-14 wk
19 May
12 Jun
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
21 – 28 May
3-4 wk
18 Jun
5 wk after
Cornflower
Centaurea cyanus
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Statice
Limonium sinuatum
21 Mar – 4 Apr
19 Apr
8-10 wk
30 May
14 Jun
2 wk after
Sweet William
Dianthus barbatus
22 Mar – 5 Apr
6-8 wk
17 May
0 wk
27 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
4 – 18 Apr
3 May
6-8 wk
30 May
14 Jun
2 wk after
23 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
2 – 16 Apr
13 May
6-8 wk
28 May
24 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
16 Apr – 14 May
27 May
4-8 wk
11 Jun
24 Jun
4 wk after
11 Jun
14 Jun
4 wk after
Foxglove
Digitalis purpurea
8 – 22 Mar
8-10 wk
17 May
0 wk
30 May
2 wk after
Busy lizzie
Impatiens walleriana
26 Mar – 23 Apr
10 Jun
8-12 wk
18 Jun
5 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Apr
13 May
6-8 wk
30 May
24 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
18 Apr – 2 May
23 Apr
4-6 wk
30 May
2 wk after
Chinese lantern
Physalis alkekengi
10 – 24 Mar
17 Apr
8-10 wk
19 May
12 Jun
0 wk
Love in a mist
Nigella damascena
17 May
27 Jun
0 wk
18 May
17 Jun
0 wk
Strawflower
Xerochrysum bracteatum
4 – 18 Apr
23 Apr
6-8 wk
30 May
4 Jun
2 wk after
23 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
24 Feb – 24 Mar
17 Apr
8-12 wk
19 May
12 Jun
0 wk
Cardoon
Cynara cardunculus
7 Mar – 4 Apr
18 Mar
8-12 wk
30 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
7 Mar – 4 Apr
15 Apr
8-12 wk
30 May
10 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
4 – 18 Apr
29 Apr
6-8 wk
30 May
10 Jun
2 wk after
Corn poppy
Papaver rhoeas
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
22 Feb – 22 Mar
7 May
8-12 wk
17 May
2 Jul
0 wk
27 May
22 Jun
1 wk after
Flossflower
Ageratum houstonianum
9 – 23 Apr
29 Apr
8-10 wk
18 Jun
24 Jun
5 wk after
Sweet pea
Lathyrus odoratus
22 Mar – 12 Apr
28 May
5-8 wk
17 May
2 Jul
0 wk
Stock
Matthiola incana
22 Mar – 5 Apr
31 May
6-8 wk
17 May
12 Jul
0 wk
30 May
2 Jul
2 wk after
Wormwood
Artemisia absinthium
22 Mar – 5 Apr
1 May
6-8 wk
17 May
12 Jun
0 wk
30 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
18 Apr – 2 May
8 May
4-6 wk
30 May
5 Jun
2 wk after
Garden pansy
Viola × wittrockiana
8 – 22 Mar
17 May
8-10 wk
17 May
12 Jul
0 wk
27 May
2 Jul
1 wk after
Petunia
Petunia
7 Mar – 4 Apr
19 Apr
8-12 wk
30 May
14 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
24 Mar – 7 Apr
1 May
6-8 wk
19 May
12 Jun
0 wk
29 Jun
6 wk after
Common zinnia
Zinnia elegans
18 Apr – 2 May
23 May
4-6 wk
30 May
20 Jun
2 wk after
Common morning glory
Ipomoea purpurea
14 – 28 May
17 May
3-5 wk
18 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
18 Apr – 2 May
27 May
4-6 wk
30 May
24 Jun
2 wk after
29 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
16 Apr – 14 May
2 May
8-12 wk
9 Jul
8 wk after
Bee balm
Monarda didyma
22 Feb – 22 Mar
17 Apr
8-12 wk
17 May
12 Jun
0 wk
11 Jun
4 wk after
Yarrow
Achillea millefolium
22 Mar – 5 Apr
1 Apr
6-8 wk
17 May
0 wk
30 May
2 wk after
Safflower
Carthamus tinctorius
17 May
12 Jun
0 wk
18 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
22 Mar – 5 Apr
21 May
6-8 wk
17 May
2 Jul
0 wk
1 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
5 – 19 Apr
4 Jun
4-6 wk
17 May
2 Jul
0 wk
30 May
22 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
7 – 21 Mar
26 Mar
10-12 wk
30 May
4 Jun
2 wk after
Sunflower
Helianthus annuus
2 – 9 May
11 Jun
3-4 wk
30 May
2 Jul
2 wk after
11 Jun
22 Jun
4 wk after
China aster
Callistephus chinensis
4 – 18 Apr
31 May
6-8 wk
30 May
12 Jul
2 wk after
29 Jun
2 Jul
6 wk after
Annual phlox
Phlox drummondii
28 Mar – 11 Apr
13 May
6-8 wk
23 May
24 Jun
1 wk after
29 Jun
6 wk after
Hollyhock
Alcea rosea
22 Mar – 5 Apr
6-8 wk
17 May
0 wk
30 May
2 wk after
Alpine delphinium
Delphinium elatum
22 Feb – 22 Mar
17 Apr
8-12 wk
17 May
12 Jun
0 wk
11 Jun
4 wk after
African marigold
Tagetes erecta
4 – 18 Apr
13 May
6-8 wk
30 May
24 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
24 Mar – 7 Apr
21 May
6-8 wk
19 May
2 Jul
0 wk
29 Jun
6 wk after
Wood sage
Salvia nemorosa
8 – 22 Mar
7 Apr
8-10 wk
17 May
2 Jun
0 wk
11 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
9 Apr – 7 May
26 Apr
6-10 wk
18 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
17 May
12 Jul
0 wk
18 May
2 Jul
0 wk
Painted tongue
Salpiglossis sinuata
21 Mar – 4 Apr
7 May
8-10 wk
30 May
2 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
22 Mar – 5 Apr
1 May
6-8 wk
17 May
12 Jun
0 wk
30 May
2 Jun
2 wk after