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Rel. frost
Last spring frost (0°C) 21 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 243 days 21 Mar – 19 Nov
Probability that frost is over

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