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Rel. frost
Last spring frost (0°C) 18 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 230 days 18 Mar – 3 Nov
Probability that frost is over

10% = 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)
28 Jan – 11 Feb
19 Jun
5-7 wk
18 Mar
24 Jul
0 wk
11 Mar
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Feb
1 Jul
4-6 wk
18 Mar
29 Jul
0 wk
11 Mar
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
12 Jan – 9 Feb
21 Mar
8-12 wk
6 Apr
16 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
28 Jan – 11 Feb
14 Jun
5-7 wk
18 Mar
19 Jul
0 wk
6 Mar
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
26 Mar – 2 Apr
15 May
3-4 wk
23 Apr
5 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
19 – 26 Mar
11 Jun
4-5 wk
23 Apr
9 Jul
5 wk after
23 Apr
29 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
16 – 23 Apr
12 May
3-4 wk
14 May
2 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
24 Dec – 21 Jan
3 Apr
8-12 wk
18 Mar
29 May
0 wk
28 Mar
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
11 Mar
18 Jun
1 wk before
11 Mar
8 Jun
1 wk before
Maize
Zea mays
9 – 16 Mar
5 May
3-4 wk
6 Apr
26 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
24 Feb – 3 Mar
8 Jul
3-4 wk
24 Mar
29 Jul
1 wk after
28 Mar
19 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 Mar
9 Jul
0 wk
6 Mar
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
28 Jan – 11 Feb
14 Jun
5-7 wk
18 Mar
19 Jul
0 wk
6 Mar
9 Jul
2 wk before
Potato
Solanum tuberosum
9 – 23 Feb
6 Jun
4-6 wk
23 Mar
4 Jul
1 wk after
23 Mar
24 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
28 Jan – 11 Feb
24 Jun
5-7 wk
18 Mar
29 Jul
0 wk
11 Mar
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
26 Mar – 2 Apr
16 Jun
3-4 wk
23 Apr
7 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 Feb – 3 Mar
14 Jun
3-4 wk
24 Mar
5 Jul
1 wk after
28 Mar
25 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Feb
26 Jun
4-6 wk
18 Mar
24 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Feb
13 Jul
3-4 wk
18 Mar
3 Aug
0 wk
11 Mar
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Feb
26 Jun
4-6 wk
18 Mar
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Feb
4 Jun
2-4 wk
6 Mar
18 Jun
2 wk before
6 Mar
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
11 Mar
18 Jun
1 wk before
11 Mar
8 Jun
1 wk before
Spinach
Spinacia oleracea
18 – 25 Feb
28 Jul
3-4 wk
18 Mar
18 Aug
0 wk
28 Feb
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
14 – 28 Apr
4-6 wk
26 May
10 wk after
Garden tomato
Solanum lycopersicum
9 – 23 Feb
14 Apr
6-8 wk
6 Apr
26 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
9 – 23 Mar
18 Jun
2-4 wk
6 Apr
2 Jul
3 wk after
23 Apr
22 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Feb
26 Jun
4-6 wk
18 Mar
24 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Feb
28 Jun
3-4 wk
18 Mar
19 Jul
0 wk
11 Mar
9 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
12 – 26 Mar
25 May
4-6 wk
23 Apr
22 Jun
5 wk after
Lemon balm
Melissa officinalis
7 – 21 Jan
24 May
8-10 wk
18 Mar
19 Jul
0 wk
8 Apr
9 Jul
3 wk after
Dill
Anethum graveolens
11 Mar
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
21 Jan – 4 Feb
7 Jun
6-8 wk
18 Mar
19 Jul
0 wk
17 Feb
9 Jul
4 wk before
Spearmint
Mentha spicata
24 Dec – 21 Jan
24 May
8-12 wk
18 Mar
19 Jul
0 wk
8 Apr
9 Jul
3 wk after
Coriander
Coriandrum sativum
18 Mar
18 Aug
0 wk
28 Mar
8 Aug
1 wk after
Garden sage
Salvia officinalis
13 – 27 Jan
9 May
8-10 wk
24 Mar
4 Jul
1 wk after
Common thyme
Thymus vulgaris
7 – 21 Jan
14 May
8-10 wk
18 Mar
9 Jul
0 wk
Oregano
Origanum vulgare
21 Jan – 4 Feb
28 May
6-8 wk
18 Mar
9 Jul
0 wk
8 Apr
29 Jun
3 wk after
Parsley
Petroselinum crispum
21 Jan – 4 Feb
28 May
6-8 wk
18 Mar
9 Jul
0 wk
11 Mar
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
16 Dec – 13 Jan
10 Apr
10-14 wk
24 Mar
19 Jun
1 wk after

Annual flowers

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