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Method
Rel. frost
Last spring frost (0°C) 1 Apr Normal year · 20 years of data
Frost-free season 235 days 1 Apr – 22 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)
11 – 25 Feb
21 Jun
5-7 wk
1 Apr
26 Jul
0 wk
26 Mar
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
18 Feb – 4 Mar
3 Jul
4-6 wk
1 Apr
31 Jul
0 wk
26 Mar
21 Jul
1 wk before
Chili pepper
Capsicum annuum
17 Feb – 17 Mar
21 Apr
8-12 wk
12 May
16 Jun
6 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
11 – 25 Feb
16 Jun
5-7 wk
1 Apr
21 Jul
0 wk
19 Mar
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
14 – 21 Apr
2 Jul
3-4 wk
12 May
23 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
7 – 14 Apr
13 Jun
4-5 wk
12 May
11 Jul
6 wk after
12 May
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
7 – 14 Jun
3-4 wk
5 Jul
14 wk after
Onion
Allium cepa (Cepa-gruppen)
7 Jan – 4 Feb
6 Apr
8-12 wk
1 Apr
1 Jun
0 wk
14 Apr
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
26 Mar
21 Jun
1 wk before
26 Mar
11 Jun
1 wk before
Maize
Zea mays
31 Mar – 7 Apr
22 Jun
3-4 wk
28 Apr
13 Jul
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
4 – 11 Mar
10 Jul
3-4 wk
1 Apr
31 Jul
0 wk
14 Apr
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
1 Apr
11 Jul
0 wk
19 Mar
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
11 – 25 Feb
16 Jun
5-7 wk
1 Apr
21 Jul
0 wk
19 Mar
11 Jul
2 wk before
Potato
Solanum tuberosum
23 Feb – 9 Mar
13 Jun
4-6 wk
6 Apr
11 Jul
1 wk after
6 Apr
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
11 – 25 Feb
26 Jun
5-7 wk
1 Apr
31 Jul
0 wk
26 Mar
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
14 – 21 Apr
15 Jul
3-4 wk
12 May
5 Aug
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
4 – 11 Mar
1 Jul
3-4 wk
1 Apr
22 Jul
0 wk
14 Apr
12 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
18 Feb – 4 Mar
28 Jun
4-6 wk
1 Apr
26 Jul
0 wk
Lettuce
Lactuca sativa
4 – 11 Mar
15 Jul
3-4 wk
1 Apr
5 Aug
0 wk
26 Mar
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
18 Feb – 4 Mar
28 Jun
4-6 wk
1 Apr
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
19 Feb – 5 Mar
7 Jun
2-4 wk
19 Mar
21 Jun
2 wk before
19 Mar
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
26 Mar
21 Jun
1 wk before
26 Mar
11 Jun
1 wk before
Spinach
Spinacia oleracea
4 – 11 Mar
30 Jul
3-4 wk
1 Apr
20 Aug
0 wk
12 Mar
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
3 – 17 May
4-6 wk
14 Jun
11 wk after
Garden tomato
Solanum lycopersicum
3 – 17 Mar
1 Jun
6-8 wk
28 Apr
13 Jul
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
31 Mar – 14 Apr
17 Jul
2-4 wk
28 Apr
31 Jul
4 wk after
12 May
21 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
18 Feb – 4 Mar
28 Jun
4-6 wk
1 Apr
26 Jul
0 wk
Garden pea
Pisum sativum
4 – 11 Mar
30 Jun
3-4 wk
1 Apr
21 Jul
0 wk
26 Mar
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
31 Mar – 14 Apr
23 Jun
4-6 wk
12 May
21 Jul
6 wk after
Lemon balm
Melissa officinalis
21 Jan – 4 Feb
26 May
8-10 wk
1 Apr
21 Jul
0 wk
27 Apr
11 Jul
4 wk after
Dill
Anethum graveolens
26 Mar
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
4 – 18 Feb
9 Jun
6-8 wk
1 Apr
21 Jul
0 wk
26 Feb
11 Jul
5 wk before
Spearmint
Mentha spicata
7 Jan – 4 Feb
26 May
8-12 wk
1 Apr
21 Jul
0 wk
27 Apr
11 Jul
4 wk after
Coriander
Coriandrum sativum
1 Apr
20 Aug
0 wk
14 Apr
10 Aug
2 wk after
Garden sage
Salvia officinalis
21 Jan – 4 Feb
11 May
8-10 wk
1 Apr
6 Jul
0 wk
Common thyme
Thymus vulgaris
21 Jan – 4 Feb
16 May
8-10 wk
1 Apr
11 Jul
0 wk
Oregano
Origanum vulgare
4 – 18 Feb
30 May
6-8 wk
1 Apr
11 Jul
0 wk
27 Apr
1 Jul
4 wk after
Parsley
Petroselinum crispum
4 – 18 Feb
30 May
6-8 wk
1 Apr
11 Jul
0 wk
26 Mar
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
24 Dec – 21 Jan
12 Apr
10-14 wk
1 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
14 – 21 Apr
30 Jun
3-4 wk
12 May
21 Jul
6 wk after
Cornflower
Centaurea cyanus
1 Apr
21 Jul
0 wk
26 Mar
11 Jul
1 wk before
Statice
Limonium sinuatum
17 Feb – 3 Mar
16 May
8-10 wk
28 Apr
11 Jul
4 wk after
Sweet William
Dianthus barbatus
4 – 18 Feb
6-8 wk
1 Apr
0 wk
6 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
3 – 17 Mar
30 May
6-8 wk
28 Apr
11 Jul
4 wk after
14 Jun
1 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
26 Feb – 12 Mar
30 May
6-8 wk
23 Apr
11 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 Mar
13 Jun
4-8 wk
27 Apr
11 Jul
4 wk after
27 Apr
1 Jul
4 wk after
Foxglove
Digitalis purpurea
21 Jan – 4 Feb
8-10 wk
1 Apr
0 wk
14 Apr
2 wk after
Busy lizzie
Impatiens walleriana
17 Feb – 17 Mar
11 Jul
8-12 wk
12 May
5 Sep
6 wk after
Creeping zinnia
Sanvitalia procumbens
3 – 17 Mar
9 Jun
6-8 wk
28 Apr
21 Jul
4 wk after
Hyacinth bean
Dolichos lablab
18 Apr – 2 May
16 May
4-6 wk
30 May
13 Jun
8 wk after
Chinese lantern
Physalis alkekengi
21 Jan – 4 Feb
26 Apr
8-10 wk
1 Apr
21 Jun
0 wk
Love in a mist
Nigella damascena
1 Apr
6 Jul
0 wk
26 Mar
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
3 – 17 Mar
20 May
6-8 wk
28 Apr
1 Jul
4 wk after
14 Jun
21 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
7 Jan – 4 Feb
26 Apr
8-12 wk
1 Apr
21 Jun
0 wk
Cardoon
Cynara cardunculus
3 Feb – 3 Mar
27 Mar
8-12 wk
28 Apr
22 May
4 wk after
Regal-foxtail
Ptilotus nobilis
17 Feb – 17 Mar
16 May
8-12 wk
12 May
11 Jul
6 wk after
Globe amaranth
Gomphrena globosa
17 – 31 Mar
30 May
6-8 wk
12 May
11 Jul
6 wk after
Corn poppy
Papaver rhoeas
1 Apr
21 Jul
0 wk
26 Mar
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
7 Jan – 4 Feb
16 May
8-12 wk
1 Apr
11 Jul
0 wk
6 Apr
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
3 – 17 Mar
26 May
8-10 wk
12 May
21 Jul
6 wk after
Sweet pea
Lathyrus odoratus
4 – 25 Feb
6 Jun
5-8 wk
1 Apr
11 Jul
0 wk
Stock
Matthiola incana
4 – 18 Feb
9 Jun
6-8 wk
1 Apr
21 Jul
0 wk
14 Apr
11 Jul
2 wk after
Wormwood
Artemisia absinthium
4 – 18 Feb
10 May
6-8 wk
1 Apr
21 Jun
0 wk
14 Apr
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
31 Mar – 14 Apr
8 Jun
4-6 wk
12 May
6 Jul
6 wk after
Garden pansy
Viola × wittrockiana
21 Jan – 4 Feb
26 May
8-10 wk
1 Apr
21 Jul
0 wk
6 Apr
11 Jul
1 wk after
Petunia
Petunia
3 Feb – 3 Mar
16 May
8-12 wk
28 Apr
11 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Feb
10 May
6-8 wk
1 Apr
21 Jun
0 wk
12 May
11 Jun
6 wk after
Common zinnia
Zinnia elegans
17 – 31 Mar
23 Jun
4-6 wk
28 Apr
21 Jul
4 wk after
Common morning glory
Ipomoea purpurea
7 – 21 Apr
30 Jun
3-5 wk
12 May
21 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
17 – 31 Mar
13 Jun
4-6 wk
28 Apr
11 Jul
4 wk after
12 May
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
7 Mar – 4 Apr
15 Jun
8-12 wk
30 May
10 Aug
8 wk after
Bee balm
Monarda didyma
7 Jan – 4 Feb
26 Apr
8-12 wk
1 Apr
21 Jun
0 wk
27 Apr
11 Jun
4 wk after
Yarrow
Achillea millefolium
4 – 18 Feb
10 Apr
6-8 wk
1 Apr
22 May
0 wk
14 Apr
12 May
2 wk after
Safflower
Carthamus tinctorius
1 Apr
21 Jun
0 wk
26 Mar
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
4 – 18 Feb
30 May
6-8 wk
1 Apr
11 Jul
0 wk
14 Feb
1 Jul
7 wk before
Bishop's flower
Ammi majus
18 Feb – 4 Mar
13 Jun
4-6 wk
1 Apr
11 Jul
0 wk
14 Apr
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
17 Feb – 3 Mar
12 Apr
10-12 wk
12 May
21 Jun
6 wk after
Sunflower
Helianthus annuus
31 Mar – 7 Apr
20 Jun
3-4 wk
28 Apr
11 Jul
4 wk after
27 Apr
1 Jul
4 wk after
China aster
Callistephus chinensis
3 – 17 Mar
9 Jun
6-8 wk
28 Apr
21 Jul
4 wk after
12 May
11 Jul
6 wk after
Annual phlox
Phlox drummondii
22 Feb – 8 Mar
9 Jun
6-8 wk
19 Apr
21 Jul
3 wk after
12 May
11 Jul
6 wk after
Hollyhock
Alcea rosea
4 – 18 Feb
6-8 wk
1 Apr
0 wk
14 Apr
2 wk after
Alpine delphinium
Delphinium elatum
7 Jan – 4 Feb
26 Apr
8-12 wk
1 Apr
21 Jun
0 wk
27 Apr
11 Jun
4 wk after
African marigold
Tagetes erecta
3 – 17 Mar
9 Jun
6-8 wk
28 Apr
21 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Feb
30 May
6-8 wk
1 Apr
11 Jul
0 wk
12 May
1 Jul
6 wk after
Wood sage
Salvia nemorosa
21 Jan – 4 Feb
16 Apr
8-10 wk
1 Apr
11 Jun
0 wk
27 Apr
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
3 – 31 Mar
9 Jun
6-10 wk
12 May
21 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
1 Apr
21 Jul
0 wk
26 Mar
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
17 Feb – 3 Mar
16 May
8-10 wk
28 Apr
11 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
4 – 18 Feb
10 May
6-8 wk
1 Apr
21 Jun
0 wk
19 Mar
11 Jun
2 wk before