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Method
Rel. frost
Last spring frost (0°C) 1 May Normal year · 20 years of data
Frost-free season 170 days 1 May – 18 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)
11 – 25 Apr
18 Jun
5-7 wk
30 May
23 Jul
4 wk after
24 Apr
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
30 Jun
4-6 wk
15 May
28 Jul
2 wk after
24 Apr
18 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
25 Mar – 22 Apr
16 Apr
8-12 wk
17 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 Feb – 2 Mar
13 Jun
5-7 wk
6 Apr
18 Jul
4 wk before
19 Apr
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
28 May – 4 Jun
10 Jun
3-4 wk
25 Jun
1 Jul
8 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 May
10 Jun
4-5 wk
25 Jun
8 Jul
8 wk after
6 Jun
28 Jun
5 wk after
Butter bean
Phaseolus lunatus
Greenhouse
30 May – 6 Jun
4 Jun
3-4 wk
27 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Feb – 6 Mar
3 Apr
8-12 wk
1 May
29 May
Vid frost
11 May
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
24 Apr
18 Jun
1 wk before
24 Apr
8 Jun
1 wk before
Maize
Zea mays
20 – 27 May
31 May
3-4 wk
17 Jun
21 Jun
7 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 May
7 Jul
3-4 wk
30 May
28 Jul
4 wk after
11 May
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
19 Apr
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 Feb – 2 Mar
13 Jun
5-7 wk
6 Apr
18 Jul
4 wk before
19 Apr
8 Jul
2 wk before
Potato
Solanum tuberosum
25 Mar – 8 Apr
10 Jun
4-6 wk
6 May
8 Jul
1 wk after
6 May
28 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 Feb – 2 Mar
23 Jun
5-7 wk
6 Apr
28 Jul
4 wk before
24 Apr
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
28 May – 4 Jun
27 Jun
3-4 wk
25 Jun
18 Jul
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 May
2 Jul
3-4 wk
30 May
23 Jul
4 wk after
11 May
13 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
25 Jun
4-6 wk
15 May
23 Jul
2 wk after
Lettuce
Lactuca sativa
27 Mar – 3 Apr
12 Jul
3-4 wk
24 Apr
2 Aug
1 wk before
24 Apr
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
13 – 27 Mar
25 Jun
4-6 wk
24 Apr
23 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Mar – 5 Apr
4 Jun
2-4 wk
19 Apr
18 Jun
2 wk before
19 Apr
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
24 Apr
18 Jun
1 wk before
24 Apr
8 Jun
1 wk before
Spinach
Spinacia oleracea
19 – 26 Mar
27 Jul
3-4 wk
16 Apr
17 Aug
2 wk before
13 Apr
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
28 May – 11 Jun
4-6 wk
9 Jul
10 wk after
Garden tomato
Solanum lycopersicum
22 Apr – 6 May
10 May
6-8 wk
17 Jun
21 Jun
7 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
20 May – 3 Jun
29 Jun
2-4 wk
17 Jun
13 Jul
7 wk after
6 Jun
3 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
25 Jun
4-6 wk
15 May
23 Jul
2 wk after
Garden pea
Pisum sativum
19 – 26 Mar
27 Jun
3-4 wk
16 Apr
18 Jul
2 wk before
24 Apr
8 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
5 Jun
4-6 wk
25 Jun
3 Jul
8 wk after
Lemon balm
Melissa officinalis
20 Feb – 6 Mar
23 May
8-10 wk
1 May
18 Jul
Vid frost
22 May
8 Jul
3 wk after
Dill
Anethum graveolens
24 Apr
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
9 – 23 Feb
6 Jun
6-8 wk
6 Apr
18 Jul
4 wk before
24 Apr
8 Jul
1 wk before
Spearmint
Mentha spicata
22 Jan – 19 Feb
23 May
8-12 wk
16 Apr
18 Jul
2 wk before
22 May
8 Jul
3 wk after
Coriander
Coriandrum sativum
11 May
7 Aug
1 wk after
Garden sage
Salvia officinalis
21 Mar – 4 Apr
8 May
8-10 wk
30 May
3 Jul
4 wk after
Common thyme
Thymus vulgaris
6 – 20 Mar
13 May
8-10 wk
15 May
8 Jul
2 wk after
Oregano
Origanum vulgare
12 – 26 Mar
27 May
6-8 wk
7 May
8 Jul
1 wk after
22 May
28 Jun
3 wk after
Parsley
Petroselinum crispum
19 Feb – 5 Mar
27 May
6-8 wk
16 Apr
8 Jul
2 wk before
24 Apr
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
21 Feb – 21 Mar
9 Apr
10-14 wk
30 May
18 Jun
4 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
12 Jun
3-4 wk
25 Jun
3 Jul
8 wk after
Cornflower
Centaurea cyanus
16 Apr
18 Jul
2 wk before
24 Apr
8 Jul
1 wk before
Statice
Limonium sinuatum
8 – 22 Apr
13 May
8-10 wk
17 Jun
8 Jul
7 wk after
Sweet William
Dianthus barbatus
19 Feb – 5 Mar
6-8 wk
16 Apr
2 wk before
6 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
22 Apr – 6 May
27 May
6-8 wk
17 Jun
8 Jul
7 wk after
9 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Apr
27 May
6-8 wk
11 Jun
8 Jul
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Mar – 24 Apr
10 Jun
4-8 wk
22 May
8 Jul
3 wk after
22 May
28 Jun
3 wk after
Foxglove
Digitalis purpurea
5 – 19 Feb
8-10 wk
16 Apr
2 wk before
11 May
1 wk after
Busy lizzie
Impatiens walleriana
2 – 30 Apr
5 Jul
8-12 wk
25 Jun
30 Aug
8 wk after
Creeping zinnia
Sanvitalia procumbens
22 Apr – 6 May
6 Jun
6-8 wk
17 Jun
18 Jul
7 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
6 – 20 May
18 May
4-6 wk
17 Jun
7 wk after
Chinese lantern
Physalis alkekengi
21 Mar – 4 Apr
23 Apr
8-10 wk
30 May
18 Jun
4 wk after
Love in a mist
Nigella damascena
24 Apr
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
22 Apr – 6 May
17 May
6-8 wk
17 Jun
28 Jun
7 wk after
9 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
7 Mar – 4 Apr
23 Apr
8-12 wk
30 May
18 Jun
4 wk after
Cardoon
Cynara cardunculus
25 Mar – 22 Apr
8-12 wk
17 Jun
7 wk after
Regal-foxtail
Ptilotus nobilis
2 – 30 Apr
28 Apr
8-12 wk
25 Jun
8 wk after
Globe amaranth
Gomphrena globosa
30 Apr – 14 May
12 May
6-8 wk
25 Jun
8 wk after
Corn poppy
Papaver rhoeas
24 Apr
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
30 Jan – 27 Feb
13 May
8-12 wk
24 Apr
8 Jul
1 wk before
6 May
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
16 – 30 Apr
23 May
8-10 wk
25 Jun
18 Jul
8 wk after
Sweet pea
Lathyrus odoratus
19 Feb – 12 Mar
3 Jun
5-8 wk
16 Apr
8 Jul
2 wk before
Stock
Matthiola incana
27 Feb – 13 Mar
6 Jun
6-8 wk
24 Apr
18 Jul
1 wk before
11 May
8 Jul
1 wk after
Wormwood
Artemisia absinthium
19 Feb – 5 Mar
7 May
6-8 wk
16 Apr
18 Jun
2 wk before
11 May
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
14 – 28 May
21 May
4-6 wk
25 Jun
8 wk after
Garden pansy
Viola × wittrockiana
26 Jan – 9 Feb
23 May
8-10 wk
6 Apr
18 Jul
4 wk before
6 May
8 Jul
1 wk after
Petunia
Petunia
25 Mar – 22 Apr
13 May
8-12 wk
17 Jun
8 Jul
7 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Apr
7 May
6-8 wk
30 May
18 Jun
4 wk after
6 Jun
8 Jun
5 wk after
Common zinnia
Zinnia elegans
6 – 20 May
17 Jun
4-6 wk
17 Jun
15 Jul
7 wk after
Common morning glory
Ipomoea purpurea
21 May – 4 Jun
12 Jun
3-5 wk
25 Jun
3 Jul
8 wk after
Garden cosmos
Cosmos bipinnatus
6 – 20 May
10 Jun
4-6 wk
17 Jun
8 Jul
7 wk after
6 Jun
28 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
6 Apr – 4 May
28 May
8-12 wk
29 Jun
23 Jul
8 wk after
Bee balm
Monarda didyma
6 Feb – 6 Mar
23 Apr
8-12 wk
1 May
18 Jun
Vid frost
22 May
8 Jun
3 wk after
Yarrow
Achillea millefolium
19 Feb – 5 Mar
7 Apr
6-8 wk
16 Apr
19 May
2 wk before
11 May
1 wk after
Safflower
Carthamus tinctorius
16 Apr
18 Jun
2 wk before
24 Apr
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
9 – 23 Feb
27 May
6-8 wk
6 Apr
8 Jul
4 wk before
19 Apr
28 Jun
2 wk before
Bishop's flower
Ammi majus
30 Mar – 13 Apr
10 Jun
4-6 wk
11 May
8 Jul
1 wk after
11 May
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
2 – 16 Apr
6 Apr
10-12 wk
25 Jun
8 wk after
Sunflower
Helianthus annuus
20 – 27 May
17 Jun
3-4 wk
17 Jun
8 Jul
7 wk after
22 May
28 Jun
3 wk after
China aster
Callistephus chinensis
22 Apr – 6 May
6 Jun
6-8 wk
17 Jun
18 Jul
7 wk after
6 Jun
8 Jul
5 wk after
Annual phlox
Phlox drummondii
10 – 24 Apr
6 Jun
6-8 wk
5 Jun
18 Jul
5 wk after
6 Jun
8 Jul
5 wk after
Hollyhock
Alcea rosea
19 Feb – 5 Mar
6-8 wk
16 Apr
2 wk before
11 May
1 wk after
Alpine delphinium
Delphinium elatum
20 Feb – 20 Mar
23 Apr
8-12 wk
15 May
18 Jun
2 wk after
22 May
8 Jun
3 wk after
African marigold
Tagetes erecta
22 Apr – 6 May
6 Jun
6-8 wk
17 Jun
18 Jul
7 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Apr
27 May
6-8 wk
30 May
8 Jul
4 wk after
6 Jun
28 Jun
5 wk after
Wood sage
Salvia nemorosa
26 Feb – 12 Mar
13 Apr
8-10 wk
7 May
8 Jun
1 wk after
22 May
29 May
3 wk after
Black-eyed susan vine
Thunbergia alata
16 Apr – 14 May
22 May
6-10 wk
25 Jun
3 Jul
8 wk after
California goldenpoppy
Eschscholzia californica
24 Apr
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
8 – 22 Apr
13 May
8-10 wk
17 Jun
8 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
19 Feb – 5 Mar
7 May
6-8 wk
16 Apr
18 Jun
2 wk before
11 May
8 Jun
1 wk after