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Method
Rel. frost
Last spring frost (0°C) 12 Apr Normal year · 20 years of data
Frost-free season 218 days 12 Apr – 16 Nov
Probability that frost is over

50% = 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)
22 Feb – 8 Mar
21 Jun
5-7 wk
12 Apr
26 Jul
0 wk
6 Apr
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
1 – 15 Mar
3 Jul
4-6 wk
12 Apr
31 Jul
0 wk
6 Apr
21 Jul
1 wk before
Chili pepper
Capsicum annuum
28 Feb – 28 Mar
17 Apr
8-12 wk
23 May
12 Jun
6 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
22 Feb – 8 Mar
16 Jun
5-7 wk
12 Apr
21 Jul
0 wk
30 Mar
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
25 Apr – 2 May
26 Jun
3-4 wk
23 May
17 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
18 – 25 Apr
13 Jun
4-5 wk
23 May
11 Jul
6 wk after
23 May
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Fleece
21 – 28 May
9 Jun
3-4 wk
18 Jun
30 Jun
10 wk after
Onion
Allium cepa (Cepa-gruppen)
18 Jan – 15 Feb
6 Apr
8-12 wk
12 Apr
1 Jun
0 wk
25 Apr
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 Apr
21 Jun
1 wk before
6 Apr
11 Jun
1 wk before
Maize
Zea mays
11 – 18 Apr
16 Jun
3-4 wk
9 May
7 Jul
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Mar
10 Jul
3-4 wk
12 Apr
31 Jul
0 wk
25 Apr
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 Apr
11 Jul
0 wk
30 Mar
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
22 Feb – 8 Mar
16 Jun
5-7 wk
12 Apr
21 Jul
0 wk
30 Mar
11 Jul
2 wk before
Potato
Solanum tuberosum
6 – 20 Mar
13 Jun
4-6 wk
17 Apr
11 Jul
1 wk after
17 Apr
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Feb – 8 Mar
26 Jun
5-7 wk
12 Apr
31 Jul
0 wk
6 Apr
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
25 Apr – 2 May
14 Jul
3-4 wk
23 May
4 Aug
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Mar
1 Jul
3-4 wk
12 Apr
22 Jul
0 wk
25 Apr
12 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
1 – 15 Mar
28 Jun
4-6 wk
12 Apr
26 Jul
0 wk
Lettuce
Lactuca sativa
15 – 22 Mar
15 Jul
3-4 wk
12 Apr
5 Aug
0 wk
6 Apr
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Mar
28 Jun
4-6 wk
12 Apr
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
2 – 16 Mar
7 Jun
2-4 wk
30 Mar
21 Jun
2 wk before
30 Mar
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
6 Apr
21 Jun
1 wk before
6 Apr
11 Jun
1 wk before
Spinach
Spinacia oleracea
15 – 22 Mar
30 Jul
3-4 wk
12 Apr
20 Aug
0 wk
23 Mar
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
14 – 28 May
4-6 wk
25 Jun
11 wk after
Garden tomato
Solanum lycopersicum
14 – 28 Mar
26 May
6-8 wk
9 May
7 Jul
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
11 – 25 Apr
16 Jul
2-4 wk
9 May
30 Jul
4 wk after
23 May
20 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
1 – 15 Mar
28 Jun
4-6 wk
12 Apr
26 Jul
0 wk
Garden pea
Pisum sativum
15 – 22 Mar
30 Jun
3-4 wk
12 Apr
21 Jul
0 wk
6 Apr
11 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
11 – 25 Apr
22 Jun
4-6 wk
23 May
20 Jul
6 wk after
Lemon balm
Melissa officinalis
1 – 15 Feb
26 May
8-10 wk
12 Apr
21 Jul
0 wk
8 May
11 Jul
4 wk after
Dill
Anethum graveolens
6 Apr
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
15 Feb – 1 Mar
9 Jun
6-8 wk
12 Apr
21 Jul
0 wk
6 Apr
11 Jul
1 wk before
Spearmint
Mentha spicata
18 Jan – 15 Feb
26 May
8-12 wk
12 Apr
21 Jul
0 wk
8 May
11 Jul
4 wk after
Coriander
Coriandrum sativum
12 Apr
20 Aug
0 wk
25 Apr
10 Aug
2 wk after
Garden sage
Salvia officinalis
1 – 15 Feb
11 May
8-10 wk
12 Apr
6 Jul
0 wk
Common thyme
Thymus vulgaris
1 – 15 Feb
16 May
8-10 wk
12 Apr
11 Jul
0 wk
Oregano
Origanum vulgare
15 Feb – 1 Mar
30 May
6-8 wk
12 Apr
11 Jul
0 wk
8 May
1 Jul
4 wk after
Parsley
Petroselinum crispum
15 Feb – 1 Mar
30 May
6-8 wk
12 Apr
11 Jul
0 wk
6 Apr
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
4 Jan – 1 Feb
12 Apr
10-14 wk
12 Apr
21 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
25 Apr – 2 May
29 Jun
3-4 wk
23 May
20 Jul
6 wk after
Cornflower
Centaurea cyanus
12 Apr
21 Jul
0 wk
6 Apr
11 Jul
1 wk before
Statice
Limonium sinuatum
28 Feb – 14 Mar
16 May
8-10 wk
9 May
11 Jul
4 wk after
Sweet William
Dianthus barbatus
15 Feb – 1 Mar
6-8 wk
12 Apr
0 wk
17 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
14 – 28 Mar
30 May
6-8 wk
9 May
11 Jul
4 wk after
25 Jun
1 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
9 – 23 Mar
30 May
6-8 wk
4 May
11 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
13 Mar – 10 Apr
13 Jun
4-8 wk
8 May
11 Jul
4 wk after
8 May
1 Jul
4 wk after
Foxglove
Digitalis purpurea
1 – 15 Feb
8-10 wk
12 Apr
0 wk
25 Apr
2 wk after
Busy lizzie
Impatiens walleriana
28 Feb – 28 Mar
11 Jul
8-12 wk
23 May
5 Sep
6 wk after
Creeping zinnia
Sanvitalia procumbens
14 – 28 Mar
9 Jun
6-8 wk
9 May
21 Jul
4 wk after
Hyacinth bean
Dolichos lablab
29 Apr – 13 May
10 May
4-6 wk
10 Jun
8 wk after
Chinese lantern
Physalis alkekengi
1 – 15 Feb
26 Apr
8-10 wk
12 Apr
21 Jun
0 wk
Love in a mist
Nigella damascena
12 Apr
6 Jul
0 wk
6 Apr
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
14 – 28 Mar
20 May
6-8 wk
9 May
1 Jul
4 wk after
25 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
18 Jan – 15 Feb
26 Apr
8-12 wk
12 Apr
21 Jun
0 wk
Cardoon
Cynara cardunculus
14 Feb – 14 Mar
27 Mar
8-12 wk
9 May
22 May
4 wk after
Regal-foxtail
Ptilotus nobilis
28 Feb – 28 Mar
15 May
8-12 wk
23 May
10 Jul
6 wk after
Globe amaranth
Gomphrena globosa
28 Mar – 11 Apr
29 May
6-8 wk
23 May
10 Jul
6 wk after
Corn poppy
Papaver rhoeas
12 Apr
21 Jul
0 wk
6 Apr
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
18 Jan – 15 Feb
16 May
8-12 wk
12 Apr
11 Jul
0 wk
17 Apr
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
14 – 28 Mar
26 May
8-10 wk
23 May
21 Jul
6 wk after
Sweet pea
Lathyrus odoratus
15 Feb – 8 Mar
6 Jun
5-8 wk
12 Apr
11 Jul
0 wk
Stock
Matthiola incana
15 Feb – 1 Mar
9 Jun
6-8 wk
12 Apr
21 Jul
0 wk
25 Apr
11 Jul
2 wk after
Wormwood
Artemisia absinthium
15 Feb – 1 Mar
10 May
6-8 wk
12 Apr
21 Jun
0 wk
25 Apr
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
11 – 25 Apr
7 Jun
4-6 wk
23 May
5 Jul
6 wk after
Garden pansy
Viola × wittrockiana
1 – 15 Feb
26 May
8-10 wk
12 Apr
21 Jul
0 wk
17 Apr
11 Jul
1 wk after
Petunia
Petunia
14 Feb – 14 Mar
16 May
8-12 wk
9 May
11 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
15 Feb – 1 Mar
10 May
6-8 wk
12 Apr
21 Jun
0 wk
23 May
11 Jun
6 wk after
Common zinnia
Zinnia elegans
28 Mar – 11 Apr
23 Jun
4-6 wk
9 May
21 Jul
4 wk after
Common morning glory
Ipomoea purpurea
18 Apr – 2 May
29 Jun
3-5 wk
23 May
20 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
28 Mar – 11 Apr
13 Jun
4-6 wk
9 May
11 Jul
4 wk after
23 May
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
18 Mar – 15 Apr
14 Jun
8-12 wk
10 Jun
9 Aug
8 wk after
Bee balm
Monarda didyma
18 Jan – 15 Feb
26 Apr
8-12 wk
12 Apr
21 Jun
0 wk
8 May
11 Jun
4 wk after
Yarrow
Achillea millefolium
15 Feb – 1 Mar
10 Apr
6-8 wk
12 Apr
22 May
0 wk
25 Apr
12 May
2 wk after
Safflower
Carthamus tinctorius
12 Apr
21 Jun
0 wk
6 Apr
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
15 Feb – 1 Mar
30 May
6-8 wk
12 Apr
11 Jul
0 wk
25 Feb
1 Jul
7 wk before
Bishop's flower
Ammi majus
1 – 15 Mar
13 Jun
4-6 wk
12 Apr
11 Jul
0 wk
25 Apr
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
28 Feb – 14 Mar
12 Apr
10-12 wk
23 May
21 Jun
6 wk after
Sunflower
Helianthus annuus
11 – 18 Apr
20 Jun
3-4 wk
9 May
11 Jul
4 wk after
8 May
1 Jul
4 wk after
China aster
Callistephus chinensis
14 – 28 Mar
9 Jun
6-8 wk
9 May
21 Jul
4 wk after
23 May
11 Jul
6 wk after
Annual phlox
Phlox drummondii
5 – 19 Mar
9 Jun
6-8 wk
30 Apr
21 Jul
3 wk after
23 May
11 Jul
6 wk after
Hollyhock
Alcea rosea
15 Feb – 1 Mar
6-8 wk
12 Apr
0 wk
25 Apr
2 wk after
Alpine delphinium
Delphinium elatum
18 Jan – 15 Feb
26 Apr
8-12 wk
12 Apr
21 Jun
0 wk
8 May
11 Jun
4 wk after
African marigold
Tagetes erecta
14 – 28 Mar
9 Jun
6-8 wk
9 May
21 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
15 Feb – 1 Mar
30 May
6-8 wk
12 Apr
11 Jul
0 wk
23 May
1 Jul
6 wk after
Wood sage
Salvia nemorosa
1 – 15 Feb
16 Apr
8-10 wk
12 Apr
11 Jun
0 wk
8 May
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
14 Mar – 11 Apr
8 Jun
6-10 wk
23 May
20 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
12 Apr
21 Jul
0 wk
6 Apr
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
28 Feb – 14 Mar
16 May
8-10 wk
9 May
11 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
15 Feb – 1 Mar
10 May
6-8 wk
12 Apr
21 Jun
0 wk
25 Apr
11 Jun
2 wk after