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Method
Rel. frost
Last spring frost (0°C) 8 May Normal year · 20 years of data
Frost-free season 152 days 8 May – 7 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)
20 Mar – 3 Apr
21 Jun
5-7 wk
8 May
26 Jul
0 wk
2 May
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
27 Mar – 10 Apr
3 Jul
4-6 wk
8 May
31 Jul
0 wk
2 May
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
5 Mar – 2 Apr
16 Apr
8-12 wk
28 May
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
20 Mar – 3 Apr
16 Jun
5-7 wk
8 May
21 Jul
0 wk
25 Apr
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
16 – 23 May
10 Jun
3-4 wk
13 Jun
1 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 May
9 Jun
4-5 wk
13 Jun
7 Jul
5 wk after
18 Jun
27 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
21 – 28 May
3 Jun
3-4 wk
18 Jun
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
13 Feb – 13 Mar
6 Apr
8-12 wk
8 May
1 Jun
0 wk
21 May
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 May
21 Jun
1 wk before
2 May
11 Jun
1 wk before
Maize
Zea mays
30 Apr – 7 May
31 May
3-4 wk
28 May
21 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Apr
10 Jul
3-4 wk
13 May
31 Jul
1 wk after
21 May
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 May
11 Jul
0 wk
25 Apr
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
20 Mar – 3 Apr
16 Jun
5-7 wk
8 May
21 Jul
0 wk
25 Apr
11 Jul
2 wk before
Potato
Solanum tuberosum
1 – 15 Apr
12 Jun
4-6 wk
13 May
10 Jul
1 wk after
13 May
30 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
20 Mar – 3 Apr
26 Jun
5-7 wk
8 May
31 Jul
0 wk
2 May
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
16 – 23 May
27 Jun
3-4 wk
13 Jun
18 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Apr
22 Jun
3-4 wk
13 May
13 Jul
1 wk after
21 May
3 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
27 Mar – 10 Apr
28 Jun
4-6 wk
8 May
26 Jul
0 wk
Lettuce
Lactuca sativa
10 – 17 Apr
15 Jul
3-4 wk
8 May
5 Aug
0 wk
2 May
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
27 Mar – 10 Apr
28 Jun
4-6 wk
8 May
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
28 Mar – 11 Apr
7 Jun
2-4 wk
25 Apr
21 Jun
2 wk before
25 Apr
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 May
21 Jun
1 wk before
2 May
11 Jun
1 wk before
Spinach
Spinacia oleracea
10 – 17 Apr
30 Jul
3-4 wk
8 May
20 Aug
0 wk
18 Apr
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
11 wk after
Garden tomato
Solanum lycopersicum
2 – 16 Apr
10 May
6-8 wk
28 May
21 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 Apr – 14 May
29 Jun
2-4 wk
28 May
13 Jul
3 wk after
18 Jun
3 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
27 Mar – 10 Apr
28 Jun
4-6 wk
8 May
26 Jul
0 wk
Garden pea
Pisum sativum
10 – 17 Apr
30 Jun
3-4 wk
8 May
21 Jul
0 wk
2 May
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
2 – 16 May
5 Jun
4-6 wk
13 Jun
3 Jul
5 wk after
Lemon balm
Melissa officinalis
27 Feb – 13 Mar
26 May
8-10 wk
8 May
21 Jul
0 wk
3 Jun
11 Jul
4 wk after
Dill
Anethum graveolens
2 May
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
13 – 27 Mar
9 Jun
6-8 wk
8 May
21 Jul
0 wk
2 May
11 Jul
1 wk before
Spearmint
Mentha spicata
13 Feb – 13 Mar
26 May
8-12 wk
8 May
21 Jul
0 wk
3 Jun
11 Jul
4 wk after
Coriander
Coriandrum sativum
8 May
20 Aug
0 wk
21 May
10 Aug
2 wk after
Garden sage
Salvia officinalis
4 – 18 Mar
11 May
8-10 wk
13 May
6 Jul
1 wk after
Common thyme
Thymus vulgaris
27 Feb – 13 Mar
16 May
8-10 wk
8 May
11 Jul
0 wk
Oregano
Origanum vulgare
13 – 27 Mar
30 May
6-8 wk
8 May
11 Jul
0 wk
3 Jun
1 Jul
4 wk after
Parsley
Petroselinum crispum
13 – 27 Mar
30 May
6-8 wk
8 May
11 Jul
0 wk
2 May
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
4 Feb – 4 Mar
12 Apr
10-14 wk
13 May
21 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
16 – 23 May
12 Jun
3-4 wk
13 Jun
3 Jul
5 wk after
Cornflower
Centaurea cyanus
8 May
21 Jul
0 wk
2 May
11 Jul
1 wk before
Statice
Limonium sinuatum
19 Mar – 2 Apr
12 May
8-10 wk
28 May
7 Jul
3 wk after
Sweet William
Dianthus barbatus
13 – 27 Mar
6-8 wk
8 May
0 wk
13 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 Apr
26 May
6-8 wk
28 May
7 Jul
3 wk after
21 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
26 Mar – 9 Apr
30 May
6-8 wk
21 May
11 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
8 Apr – 6 May
13 Jun
4-8 wk
3 Jun
11 Jul
4 wk after
3 Jun
1 Jul
4 wk after
Foxglove
Digitalis purpurea
27 Feb – 13 Mar
8-10 wk
8 May
0 wk
21 May
2 wk after
Busy lizzie
Impatiens walleriana
21 Mar – 18 Apr
4 Jul
8-12 wk
13 Jun
29 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 Apr
5 Jun
6-8 wk
28 May
17 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
16 – 30 Apr
17 May
4-6 wk
28 May
14 Jun
3 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Mar
26 Apr
8-10 wk
13 May
21 Jun
1 wk after
Love in a mist
Nigella damascena
8 May
6 Jul
0 wk
2 May
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
2 – 16 Apr
16 May
6-8 wk
28 May
27 Jun
3 wk after
21 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
18 Feb – 18 Mar
26 Apr
8-12 wk
13 May
21 Jun
1 wk after
Cardoon
Cynara cardunculus
5 Mar – 2 Apr
27 Mar
8-12 wk
28 May
3 wk after
Regal-foxtail
Ptilotus nobilis
21 Mar – 18 Apr
28 Apr
8-12 wk
13 Jun
23 Jun
5 wk after
Globe amaranth
Gomphrena globosa
18 Apr – 2 May
12 May
6-8 wk
13 Jun
23 Jun
5 wk after
Corn poppy
Papaver rhoeas
8 May
21 Jul
0 wk
2 May
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
13 Feb – 13 Mar
16 May
8-12 wk
8 May
11 Jul
0 wk
13 May
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
4 – 18 Apr
22 May
8-10 wk
13 Jun
17 Jul
5 wk after
Sweet pea
Lathyrus odoratus
13 Mar – 3 Apr
6 Jun
5-8 wk
8 May
11 Jul
0 wk
Stock
Matthiola incana
13 – 27 Mar
9 Jun
6-8 wk
8 May
21 Jul
0 wk
21 May
11 Jul
2 wk after
Wormwood
Artemisia absinthium
13 – 27 Mar
10 May
6-8 wk
8 May
21 Jun
0 wk
21 May
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
2 – 16 May
21 May
4-6 wk
13 Jun
18 Jun
5 wk after
Garden pansy
Viola × wittrockiana
27 Feb – 13 Mar
26 May
8-10 wk
8 May
21 Jul
0 wk
13 May
11 Jul
1 wk after
Petunia
Petunia
5 Mar – 2 Apr
12 May
8-12 wk
28 May
7 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Mar – 1 Apr
10 May
6-8 wk
13 May
21 Jun
1 wk after
18 Jun
6 wk after
Common zinnia
Zinnia elegans
16 – 30 Apr
16 Jun
4-6 wk
28 May
14 Jul
3 wk after
Common morning glory
Ipomoea purpurea
9 – 23 May
12 Jun
3-5 wk
13 Jun
3 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 Apr
13 Jun
4-6 wk
28 May
11 Jul
3 wk after
18 Jun
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
28 Mar – 25 Apr
28 May
8-12 wk
20 Jun
23 Jul
6 wk after
Bee balm
Monarda didyma
13 Feb – 13 Mar
26 Apr
8-12 wk
8 May
21 Jun
0 wk
3 Jun
11 Jun
4 wk after
Yarrow
Achillea millefolium
13 – 27 Mar
10 Apr
6-8 wk
8 May
22 May
0 wk
21 May
2 wk after
Safflower
Carthamus tinctorius
8 May
21 Jun
0 wk
2 May
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
13 – 27 Mar
30 May
6-8 wk
8 May
11 Jul
0 wk
23 Mar
1 Jul
7 wk before
Bishop's flower
Ammi majus
27 Mar – 10 Apr
13 Jun
4-6 wk
8 May
11 Jul
0 wk
21 May
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
21 Mar – 4 Apr
5 Apr
10-12 wk
13 Jun
14 Jun
5 wk after
Sunflower
Helianthus annuus
30 Apr – 7 May
20 Jun
3-4 wk
28 May
11 Jul
3 wk after
3 Jun
1 Jul
4 wk after
China aster
Callistephus chinensis
2 – 16 Apr
9 Jun
6-8 wk
28 May
21 Jul
3 wk after
18 Jun
11 Jul
6 wk after
Annual phlox
Phlox drummondii
23 Mar – 6 Apr
5 Jun
6-8 wk
18 May
17 Jul
1 wk after
18 Jun
7 Jul
6 wk after
Hollyhock
Alcea rosea
13 – 27 Mar
6-8 wk
8 May
0 wk
21 May
2 wk after
Alpine delphinium
Delphinium elatum
13 Feb – 13 Mar
26 Apr
8-12 wk
8 May
21 Jun
0 wk
3 Jun
11 Jun
4 wk after
African marigold
Tagetes erecta
2 – 16 Apr
5 Jun
6-8 wk
28 May
17 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
18 Mar – 1 Apr
30 May
6-8 wk
13 May
11 Jul
1 wk after
18 Jun
1 Jul
6 wk after
Wood sage
Salvia nemorosa
27 Feb – 13 Mar
16 Apr
8-10 wk
8 May
11 Jun
0 wk
3 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
4 Apr – 2 May
22 May
6-10 wk
13 Jun
3 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
8 May
21 Jul
0 wk
2 May
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
19 Mar – 2 Apr
12 May
8-10 wk
28 May
7 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
13 – 27 Mar
10 May
6-8 wk
8 May
21 Jun
0 wk
21 May
11 Jun
2 wk after