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Method
Rel. frost
Last spring frost (0°C) 5 May Normal year · 20 years of data
Frost-free season 161 days 5 May – 13 Oct
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)
17 – 31 Mar
15 Jun
5-7 wk
5 May
20 Jul
0 wk
9 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
24 Mar – 7 Apr
27 Jun
4-6 wk
5 May
25 Jul
0 wk
9 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
9 Mar – 6 Apr
13 Apr
8-12 wk
1 Jun
8 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
17 – 31 Mar
10 Jun
5-7 wk
5 May
15 Jul
0 wk
5 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
20 – 27 May
7 Jun
3-4 wk
17 Jun
28 Jun
6 wk after
Florence Fennel
Foeniculum vulgare
13 – 20 May
7 Jun
4-5 wk
17 Jun
5 Jul
6 wk after
23 Jun
25 Jun
7 wk after
Butter bean
Phaseolus lunatus
Greenhouse
25 May – 1 Jun
29 May
3-4 wk
22 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
10 Feb – 10 Mar
31 Mar
8-12 wk
5 May
26 May
0 wk
26 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
9 May
15 Jun
1 wk after
9 May
5 Jun
1 wk after
Maize
Zea mays
4 – 11 May
28 May
3-4 wk
1 Jun
18 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Apr
4 Jul
3-4 wk
13 May
25 Jul
1 wk after
26 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
5 May
5 Jul
0 wk
5 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
17 – 31 Mar
10 Jun
5-7 wk
5 May
15 Jul
0 wk
5 May
5 Jul
0 wk
Potato
Solanum tuberosum
9 – 23 Apr
6 Jun
4-6 wk
21 May
4 Jul
2 wk after
21 May
24 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
17 – 31 Mar
20 Jun
5-7 wk
5 May
25 Jul
0 wk
9 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
20 – 27 May
22 Jun
3-4 wk
17 Jun
13 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Apr
16 Jun
3-4 wk
13 May
7 Jul
1 wk after
26 May
27 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
24 Mar – 7 Apr
22 Jun
4-6 wk
5 May
20 Jul
0 wk
Lettuce
Lactuca sativa
7 – 14 Apr
9 Jul
3-4 wk
5 May
30 Jul
0 wk
9 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
24 Mar – 7 Apr
22 Jun
4-6 wk
5 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
7 – 21 Apr
1 Jun
2-4 wk
5 May
15 Jun
0 wk
5 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
9 May
15 Jun
1 wk after
9 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
7 – 14 Apr
24 Jul
3-4 wk
5 May
14 Aug
0 wk
1 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
6 – 20 Jun
4-6 wk
18 Jul
11 wk after
Garden tomato
Solanum lycopersicum
6 – 20 Apr
7 May
6-8 wk
1 Jun
18 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
4 – 18 May
24 Jun
2-4 wk
1 Jun
8 Jul
4 wk after
23 Jun
28 Jun
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
24 Mar – 7 Apr
22 Jun
4-6 wk
5 May
20 Jul
0 wk
Garden pea
Pisum sativum
7 – 14 Apr
24 Jun
3-4 wk
5 May
15 Jul
0 wk
9 May
5 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
6 – 20 May
31 May
4-6 wk
17 Jun
28 Jun
6 wk after
Lemon balm
Melissa officinalis
24 Feb – 10 Mar
20 May
8-10 wk
5 May
15 Jul
0 wk
9 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
9 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
10 – 24 Mar
3 Jun
6-8 wk
5 May
15 Jul
0 wk
9 May
5 Jul
1 wk after
Spearmint
Mentha spicata
10 Feb – 10 Mar
20 May
8-12 wk
5 May
15 Jul
0 wk
9 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
5 May
14 Aug
0 wk
26 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
4 – 18 Mar
5 May
8-10 wk
13 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
24 Feb – 10 Mar
10 May
8-10 wk
5 May
5 Jul
0 wk
Oregano
Origanum vulgare
10 – 24 Mar
24 May
6-8 wk
5 May
5 Jul
0 wk
9 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
10 – 24 Mar
24 May
6-8 wk
5 May
5 Jul
0 wk
9 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
4 Feb – 4 Mar
6 Apr
10-14 wk
13 May
15 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
20 – 27 May
7 Jun
3-4 wk
17 Jun
28 Jun
6 wk after
Cornflower
Centaurea cyanus
5 May
15 Jul
0 wk
9 May
5 Jul
1 wk after
Statice
Limonium sinuatum
23 Mar – 6 Apr
8 May
8-10 wk
1 Jun
3 Jul
4 wk after
Sweet William
Dianthus barbatus
10 – 24 Mar
6-8 wk
5 May
0 wk
21 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 Apr
22 May
6-8 wk
1 Jun
3 Jul
4 wk after
18 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
29 Mar – 12 Apr
24 May
6-8 wk
24 May
5 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
14 Apr – 12 May
7 Jun
4-8 wk
9 Jun
5 Jul
5 wk after
9 Jun
25 Jun
5 wk after
Foxglove
Digitalis purpurea
24 Feb – 10 Mar
8-10 wk
5 May
0 wk
26 May
3 wk after
Busy lizzie
Impatiens walleriana
25 Mar – 22 Apr
29 Jun
8-12 wk
17 Jun
24 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 Apr
1 Jun
6-8 wk
1 Jun
13 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
20 Apr – 4 May
12 May
4-6 wk
1 Jun
9 Jun
4 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Mar
20 Apr
8-10 wk
13 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
5 May
30 Jun
0 wk
9 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
6 – 20 Apr
12 May
6-8 wk
1 Jun
23 Jun
4 wk after
18 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
18 Feb – 18 Mar
20 Apr
8-12 wk
13 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
9 Mar – 6 Apr
21 Mar
8-12 wk
1 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
25 Mar – 22 Apr
23 Apr
8-12 wk
17 Jun
18 Jun
6 wk after
Globe amaranth
Gomphrena globosa
22 Apr – 6 May
7 May
6-8 wk
17 Jun
18 Jun
6 wk after
Corn poppy
Papaver rhoeas
5 May
15 Jul
0 wk
9 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
10 Feb – 10 Mar
10 May
8-12 wk
5 May
5 Jul
0 wk
21 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
8 – 22 Apr
18 May
8-10 wk
17 Jun
13 Jul
6 wk after
Sweet pea
Lathyrus odoratus
10 – 31 Mar
31 May
5-8 wk
5 May
5 Jul
0 wk
Stock
Matthiola incana
10 – 24 Mar
3 Jun
6-8 wk
5 May
15 Jul
0 wk
26 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
10 – 24 Mar
4 May
6-8 wk
5 May
15 Jun
0 wk
26 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
6 – 20 May
16 May
4-6 wk
17 Jun
6 wk after
Garden pansy
Viola × wittrockiana
24 Feb – 10 Mar
20 May
8-10 wk
5 May
15 Jul
0 wk
21 May
5 Jul
2 wk after
Petunia
Petunia
9 Mar – 6 Apr
8 May
8-12 wk
1 Jun
3 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Mar – 1 Apr
4 May
6-8 wk
13 May
15 Jun
1 wk after
23 Jun
7 wk after
Common zinnia
Zinnia elegans
20 Apr – 4 May
11 Jun
4-6 wk
1 Jun
9 Jul
4 wk after
Common morning glory
Ipomoea purpurea
13 – 27 May
7 Jun
3-5 wk
17 Jun
28 Jun
6 wk after
Garden cosmos
Cosmos bipinnatus
20 Apr – 4 May
7 Jun
4-6 wk
1 Jun
5 Jul
4 wk after
23 Jun
25 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
4 Apr – 2 May
23 May
8-12 wk
27 Jun
18 Jul
8 wk after
Bee balm
Monarda didyma
10 Feb – 10 Mar
20 Apr
8-12 wk
5 May
15 Jun
0 wk
9 Jun
5 wk after
Yarrow
Achillea millefolium
10 – 24 Mar
4 Apr
6-8 wk
5 May
16 May
0 wk
26 May
3 wk after
Safflower
Carthamus tinctorius
5 May
15 Jun
0 wk
9 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
10 – 24 Mar
24 May
6-8 wk
5 May
5 Jul
0 wk
17 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
24 Mar – 7 Apr
7 Jun
4-6 wk
5 May
5 Jul
0 wk
26 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
25 Mar – 8 Apr
31 Mar
10-12 wk
17 Jun
6 wk after
Sunflower
Helianthus annuus
4 – 11 May
14 Jun
3-4 wk
1 Jun
5 Jul
4 wk after
9 Jun
25 Jun
5 wk after
China aster
Callistephus chinensis
6 – 20 Apr
3 Jun
6-8 wk
1 Jun
15 Jul
4 wk after
23 Jun
5 Jul
7 wk after
Annual phlox
Phlox drummondii
25 Mar – 8 Apr
1 Jun
6-8 wk
20 May
13 Jul
2 wk after
23 Jun
3 Jul
7 wk after
Hollyhock
Alcea rosea
10 – 24 Mar
6-8 wk
5 May
0 wk
26 May
3 wk after
Alpine delphinium
Delphinium elatum
10 Feb – 10 Mar
20 Apr
8-12 wk
5 May
15 Jun
0 wk
9 Jun
5 wk after
African marigold
Tagetes erecta
6 – 20 Apr
1 Jun
6-8 wk
1 Jun
13 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
18 Mar – 1 Apr
24 May
6-8 wk
13 May
5 Jul
1 wk after
23 Jun
25 Jun
7 wk after
Wood sage
Salvia nemorosa
24 Feb – 10 Mar
10 Apr
8-10 wk
5 May
5 Jun
0 wk
9 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
8 Apr – 6 May
17 May
6-10 wk
17 Jun
28 Jun
6 wk after
California goldenpoppy
Eschscholzia californica
5 May
15 Jul
0 wk
9 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
23 Mar – 6 Apr
10 May
8-10 wk
1 Jun
5 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
10 – 24 Mar
4 May
6-8 wk
5 May
15 Jun
0 wk
26 May
5 Jun
3 wk after