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Method
Rel. frost
Last spring frost (0°C) 19 Apr Normal year · 20 years of data
Frost-free season 209 days 19 Apr – 14 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)
2 – 16 Apr
19 Jun
5-7 wk
21 May
24 Jul
5 wk after
13 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
28 Mar – 11 Apr
1 Jul
4-6 wk
9 May
29 Jul
3 wk after
13 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
2 – 30 Apr
16 Apr
8-12 wk
25 Jun
10 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Jan – 13 Feb
14 Jun
5-7 wk
20 Mar
19 Jul
4 wk before
6 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
28 May – 4 Jun
22 Jun
3-4 wk
25 Jun
13 Jul
10 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 May
11 Jun
4-5 wk
25 Jun
9 Jul
10 wk after
30 May
29 Jun
6 wk after
Butter bean
Phaseolus lunatus
Fleece
5 – 12 Jun
3-4 wk
3 Jul
11 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Jan – 22 Feb
4 Apr
8-12 wk
19 Apr
30 May
Vid frost
2 May
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
13 Apr
19 Jun
1 wk before
13 Apr
9 Jun
1 wk before
Maize
Zea mays
17 – 24 May
12 Jun
3-4 wk
14 Jun
3 Jul
8 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
23 – 30 Apr
8 Jul
3-4 wk
21 May
29 Jul
5 wk after
2 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
6 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Jan – 13 Feb
14 Jun
5-7 wk
20 Mar
19 Jul
4 wk before
6 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
13 – 27 Mar
11 Jun
4-6 wk
24 Apr
9 Jul
1 wk after
24 Apr
29 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Jan – 13 Feb
24 Jun
5-7 wk
20 Mar
29 Jul
4 wk before
13 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
28 May – 4 Jun
7 Jul
3-4 wk
25 Jun
28 Jul
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
23 – 30 Apr
30 Jun
3-4 wk
21 May
21 Jul
5 wk after
2 May
11 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
28 Mar – 11 Apr
26 Jun
4-6 wk
9 May
24 Jul
3 wk after
Lettuce
Lactuca sativa
13 – 20 Mar
13 Jul
3-4 wk
10 Apr
3 Aug
1 wk before
13 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
27 Feb – 13 Mar
26 Jun
4-6 wk
10 Apr
24 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
9 – 23 Mar
5 Jun
2-4 wk
6 Apr
19 Jun
2 wk before
6 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
13 Apr
19 Jun
1 wk before
13 Apr
9 Jun
1 wk before
Spinach
Spinacia oleracea
2 – 9 Mar
28 Jul
3-4 wk
30 Mar
18 Aug
3 wk before
30 Mar
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
21 May – 4 Jun
4-6 wk
2 Jul
11 wk after
Garden tomato
Solanum lycopersicum
19 Apr – 3 May
22 May
6-8 wk
14 Jun
3 Jul
8 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
17 – 31 May
9 Jul
2-4 wk
14 Jun
23 Jul
8 wk after
30 May
13 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
28 Mar – 11 Apr
26 Jun
4-6 wk
9 May
24 Jul
3 wk after
Garden pea
Pisum sativum
2 – 9 Mar
28 Jun
3-4 wk
30 Mar
19 Jul
3 wk before
13 Apr
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
14 – 28 May
15 Jun
4-6 wk
25 Jun
13 Jul
10 wk after
Lemon balm
Melissa officinalis
8 – 22 Feb
24 May
8-10 wk
19 Apr
19 Jul
Vid frost
15 May
9 Jul
4 wk after
Dill
Anethum graveolens
13 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
23 Jan – 6 Feb
7 Jun
6-8 wk
20 Mar
19 Jul
4 wk before
13 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
5 Jan – 2 Feb
24 May
8-12 wk
30 Mar
19 Jul
3 wk before
15 May
9 Jul
4 wk after
Coriander
Coriandrum sativum
2 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
12 – 26 Mar
9 May
8-10 wk
21 May
4 Jul
5 wk after
Common thyme
Thymus vulgaris
28 Feb – 14 Mar
14 May
8-10 wk
9 May
9 Jul
3 wk after
Oregano
Origanum vulgare
3 – 17 Mar
28 May
6-8 wk
28 Apr
9 Jul
1 wk after
15 May
29 Jun
4 wk after
Parsley
Petroselinum crispum
2 – 16 Feb
28 May
6-8 wk
30 Mar
9 Jul
3 wk before
13 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
12 Feb – 12 Mar
10 Apr
10-14 wk
21 May
19 Jun
5 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
28 May – 4 Jun
22 Jun
3-4 wk
25 Jun
13 Jul
10 wk after
Cornflower
Centaurea cyanus
30 Mar
19 Jul
3 wk before
13 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
5 – 19 Apr
14 May
8-10 wk
14 Jun
9 Jul
8 wk after
Sweet William
Dianthus barbatus
2 – 16 Feb
6-8 wk
30 Mar
3 wk before
24 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
19 Apr – 3 May
28 May
6-8 wk
14 Jun
9 Jul
8 wk after
2 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Apr
28 May
6-8 wk
7 Jun
9 Jul
7 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Mar – 17 Apr
11 Jun
4-8 wk
15 May
9 Jul
4 wk after
15 May
29 Jun
4 wk after
Foxglove
Digitalis purpurea
19 Jan – 2 Feb
8-10 wk
30 Mar
3 wk before
2 May
2 wk after
Busy lizzie
Impatiens walleriana
2 – 30 Apr
9 Jul
8-12 wk
25 Jun
3 Sep
10 wk after
Creeping zinnia
Sanvitalia procumbens
19 Apr – 3 May
7 Jun
6-8 wk
14 Jun
19 Jul
8 wk after
Hyacinth bean
Dolichos lablab
Fleece
14 – 28 May
16 May
4-6 wk
25 Jun
10 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Mar
24 Apr
8-10 wk
21 May
19 Jun
5 wk after
Love in a mist
Nigella damascena
13 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
19 Apr – 3 May
18 May
6-8 wk
14 Jun
29 Jun
8 wk after
2 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
26 Feb – 26 Mar
24 Apr
8-12 wk
21 May
19 Jun
5 wk after
Cardoon
Cynara cardunculus
22 Mar – 19 Apr
25 Mar
8-12 wk
14 Jun
8 wk after
Regal-foxtail
Ptilotus nobilis
2 – 30 Apr
8 May
8-12 wk
25 Jun
3 Jul
10 wk after
Globe amaranth
Gomphrena globosa
30 Apr – 14 May
22 May
6-8 wk
25 Jun
3 Jul
10 wk after
Corn poppy
Papaver rhoeas
13 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
16 Jan – 13 Feb
14 May
8-12 wk
10 Apr
9 Jul
1 wk before
24 Apr
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
16 – 30 Apr
24 May
8-10 wk
25 Jun
19 Jul
10 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Feb
4 Jun
5-8 wk
30 Mar
9 Jul
3 wk before
Stock
Matthiola incana
13 – 27 Feb
7 Jun
6-8 wk
10 Apr
19 Jul
1 wk before
2 May
9 Jul
2 wk after
Wormwood
Artemisia absinthium
2 – 16 Feb
8 May
6-8 wk
30 Mar
19 Jun
3 wk before
2 May
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
14 – 28 May
31 May
4-6 wk
25 Jun
28 Jun
10 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Jan
24 May
8-10 wk
20 Mar
19 Jul
4 wk before
24 Apr
9 Jul
1 wk after
Petunia
Petunia
22 Mar – 19 Apr
14 May
8-12 wk
14 Jun
9 Jul
8 wk after
Sweet Scabious
Scabiosa atropurpurea
26 Mar – 9 Apr
8 May
6-8 wk
21 May
19 Jun
5 wk after
30 May
9 Jun
6 wk after
Common zinnia
Zinnia elegans
3 – 17 May
21 Jun
4-6 wk
14 Jun
19 Jul
8 wk after
Common morning glory
Ipomoea purpurea
21 May – 4 Jun
22 Jun
3-5 wk
25 Jun
13 Jul
10 wk after
Garden cosmos
Cosmos bipinnatus
3 – 17 May
11 Jun
4-6 wk
14 Jun
9 Jul
8 wk after
30 May
29 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
9 Apr – 7 May
7 Jun
8-12 wk
2 Jul
2 Aug
11 wk after
Bee balm
Monarda didyma
25 Jan – 22 Feb
24 Apr
8-12 wk
19 Apr
19 Jun
Vid frost
15 May
9 Jun
4 wk after
Yarrow
Achillea millefolium
2 – 16 Feb
8 Apr
6-8 wk
30 Mar
20 May
3 wk before
2 May
10 May
2 wk after
Safflower
Carthamus tinctorius
30 Mar
19 Jun
3 wk before
13 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
23 Jan – 6 Feb
28 May
6-8 wk
20 Mar
9 Jul
4 wk before
6 Apr
29 Jun
2 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
11 Jun
4-6 wk
4 May
9 Jul
2 wk after
2 May
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
2 – 16 Apr
10 Apr
10-12 wk
25 Jun
10 wk after
Sunflower
Helianthus annuus
17 – 24 May
18 Jun
3-4 wk
14 Jun
9 Jul
8 wk after
15 May
29 Jun
4 wk after
China aster
Callistephus chinensis
19 Apr – 3 May
7 Jun
6-8 wk
14 Jun
19 Jul
8 wk after
30 May
9 Jul
6 wk after
Annual phlox
Phlox drummondii
4 – 18 Apr
7 Jun
6-8 wk
30 May
19 Jul
6 wk after
30 May
9 Jul
6 wk after
Hollyhock
Alcea rosea
2 – 16 Feb
6-8 wk
30 Mar
3 wk before
2 May
2 wk after
Alpine delphinium
Delphinium elatum
14 Feb – 14 Mar
24 Apr
8-12 wk
9 May
19 Jun
3 wk after
15 May
9 Jun
4 wk after
African marigold
Tagetes erecta
19 Apr – 3 May
7 Jun
6-8 wk
14 Jun
19 Jul
8 wk after
Black-eyed Susan
Rudbeckia hirta
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
5 wk after
30 May
29 Jun
6 wk after
Wood sage
Salvia nemorosa
17 Feb – 3 Mar
14 Apr
8-10 wk
28 Apr
9 Jun
1 wk after
15 May
30 May
4 wk after
Black-eyed susan vine
Thunbergia alata
16 Apr – 14 May
1 Jun
6-10 wk
25 Jun
13 Jul
10 wk after
California goldenpoppy
Eschscholzia californica
13 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
5 – 19 Apr
14 May
8-10 wk
14 Jun
9 Jul
8 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Feb
8 May
6-8 wk
30 Mar
19 Jun
3 wk before
2 May
9 Jun
2 wk after