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Method
Rel. frost
Last spring frost (0°C) 3 May Normal year · 20 years of data
Frost-free season 171 days 3 May – 21 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)
15 – 29 Mar
16 Jun
5-7 wk
3 May
21 Jul
0 wk
7 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
22 Mar – 5 Apr
28 Jun
4-6 wk
3 May
26 Jul
0 wk
7 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
7 Mar – 4 Apr
17 Apr
8-12 wk
30 May
12 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
15 – 29 Mar
11 Jun
5-7 wk
3 May
16 Jul
0 wk
3 May
6 Jul
0 wk
Garden cucumber
Cucumis sativus
18 – 25 May
11 Jun
3-4 wk
15 Jun
2 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
11 – 18 May
8 Jun
4-5 wk
15 Jun
6 Jul
6 wk after
21 Jun
26 Jun
7 wk after
Butter bean
Phaseolus lunatus
Fleece
12 – 19 Jun
3-4 wk
10 Jul
10 wk after
Onion
Allium cepa (Cepa-gruppen)
8 Feb – 8 Mar
1 Apr
8-12 wk
3 May
27 May
0 wk
24 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
7 May
16 Jun
1 wk after
7 May
6 Jun
1 wk after
Maize
Zea mays
2 – 9 May
1 Jun
3-4 wk
30 May
22 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
13 – 20 Apr
5 Jul
3-4 wk
11 May
26 Jul
1 wk after
24 May
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 May
6 Jul
0 wk
3 May
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
15 – 29 Mar
11 Jun
5-7 wk
3 May
16 Jul
0 wk
3 May
6 Jul
0 wk
Potato
Solanum tuberosum
7 – 21 Apr
8 Jun
4-6 wk
19 May
6 Jul
2 wk after
19 May
26 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
15 – 29 Mar
21 Jun
5-7 wk
3 May
26 Jul
0 wk
7 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
18 – 25 May
29 Jun
3-4 wk
15 Jun
20 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
13 – 20 Apr
18 Jun
3-4 wk
11 May
9 Jul
1 wk after
24 May
29 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
22 Mar – 5 Apr
23 Jun
4-6 wk
3 May
21 Jul
0 wk
Lettuce
Lactuca sativa
5 – 12 Apr
10 Jul
3-4 wk
3 May
31 Jul
0 wk
7 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
22 Mar – 5 Apr
23 Jun
4-6 wk
3 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
2 Jun
2-4 wk
3 May
16 Jun
0 wk
3 May
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
7 May
16 Jun
1 wk after
7 May
6 Jun
1 wk after
Spinach
Spinacia oleracea
5 – 12 Apr
25 Jul
3-4 wk
3 May
15 Aug
0 wk
29 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
11 wk after
Garden tomato
Solanum lycopersicum
4 – 18 Apr
11 May
6-8 wk
30 May
22 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
2 – 16 May
1 Jul
2-4 wk
30 May
15 Jul
4 wk after
21 Jun
5 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
22 Mar – 5 Apr
23 Jun
4-6 wk
3 May
21 Jul
0 wk
Garden pea
Pisum sativum
5 – 12 Apr
25 Jun
3-4 wk
3 May
16 Jul
0 wk
7 May
6 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
4 – 18 May
7 Jun
4-6 wk
15 Jun
5 Jul
6 wk after
Lemon balm
Melissa officinalis
22 Feb – 8 Mar
21 May
8-10 wk
3 May
16 Jul
0 wk
7 Jun
6 Jul
5 wk after
Dill
Anethum graveolens
7 May
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
8 – 22 Mar
4 Jun
6-8 wk
3 May
16 Jul
0 wk
7 May
6 Jul
1 wk after
Spearmint
Mentha spicata
8 Feb – 8 Mar
21 May
8-12 wk
3 May
16 Jul
0 wk
7 Jun
6 Jul
5 wk after
Coriander
Coriandrum sativum
3 May
15 Aug
0 wk
24 May
5 Aug
3 wk after
Garden sage
Salvia officinalis
2 – 16 Mar
6 May
8-10 wk
11 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
22 Feb – 8 Mar
11 May
8-10 wk
3 May
6 Jul
0 wk
Oregano
Origanum vulgare
8 – 22 Mar
25 May
6-8 wk
3 May
6 Jul
0 wk
7 Jun
26 Jun
5 wk after
Parsley
Petroselinum crispum
8 – 22 Mar
25 May
6-8 wk
3 May
6 Jul
0 wk
7 May
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
2 Feb – 2 Mar
7 Apr
10-14 wk
11 May
16 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
18 – 25 May
14 Jun
3-4 wk
15 Jun
5 Jul
6 wk after
Cornflower
Centaurea cyanus
3 May
16 Jul
0 wk
7 May
6 Jul
1 wk after
Statice
Limonium sinuatum
21 Mar – 4 Apr
11 May
8-10 wk
30 May
6 Jul
4 wk after
Sweet William
Dianthus barbatus
8 – 22 Mar
6-8 wk
3 May
0 wk
19 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
4 – 18 Apr
25 May
6-8 wk
30 May
6 Jul
4 wk after
16 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
27 Mar – 10 Apr
25 May
6-8 wk
22 May
6 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
8 Jun
4-8 wk
7 Jun
6 Jul
5 wk after
7 Jun
26 Jun
5 wk after
Foxglove
Digitalis purpurea
22 Feb – 8 Mar
8-10 wk
3 May
0 wk
24 May
3 wk after
Busy lizzie
Impatiens walleriana
23 Mar – 20 Apr
3 Jul
8-12 wk
15 Jun
28 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Apr
4 Jun
6-8 wk
30 May
16 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Fleece
4 – 18 May
8 May
4-6 wk
15 Jun
6 wk after
Chinese lantern
Physalis alkekengi
2 – 16 Mar
21 Apr
8-10 wk
11 May
16 Jun
1 wk after
Love in a mist
Nigella damascena
3 May
1 Jul
0 wk
7 May
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
4 – 18 Apr
15 May
6-8 wk
30 May
26 Jun
4 wk after
16 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
16 Feb – 16 Mar
21 Apr
8-12 wk
11 May
16 Jun
1 wk after
Cardoon
Cynara cardunculus
7 Mar – 4 Apr
22 Mar
8-12 wk
30 May
4 wk after
Regal-foxtail
Ptilotus nobilis
23 Mar – 20 Apr
30 Apr
8-12 wk
15 Jun
25 Jun
6 wk after
Globe amaranth
Gomphrena globosa
20 Apr – 4 May
14 May
6-8 wk
15 Jun
25 Jun
6 wk after
Corn poppy
Papaver rhoeas
3 May
16 Jul
0 wk
7 May
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
8 Feb – 8 Mar
11 May
8-12 wk
3 May
6 Jul
0 wk
19 May
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
6 – 20 Apr
21 May
8-10 wk
15 Jun
16 Jul
6 wk after
Sweet pea
Lathyrus odoratus
8 – 29 Mar
1 Jun
5-8 wk
3 May
6 Jul
0 wk
Stock
Matthiola incana
8 – 22 Mar
4 Jun
6-8 wk
3 May
16 Jul
0 wk
24 May
6 Jul
3 wk after
Wormwood
Artemisia absinthium
8 – 22 Mar
5 May
6-8 wk
3 May
16 Jun
0 wk
24 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
4 – 18 May
23 May
4-6 wk
15 Jun
20 Jun
6 wk after
Garden pansy
Viola × wittrockiana
22 Feb – 8 Mar
21 May
8-10 wk
3 May
16 Jul
0 wk
19 May
6 Jul
2 wk after
Petunia
Petunia
7 Mar – 4 Apr
11 May
8-12 wk
30 May
6 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
16 – 30 Mar
5 May
6-8 wk
11 May
16 Jun
1 wk after
21 Jun
7 wk after
Common zinnia
Zinnia elegans
18 Apr – 2 May
15 Jun
4-6 wk
30 May
13 Jul
4 wk after
Common morning glory
Ipomoea purpurea
11 – 25 May
14 Jun
3-5 wk
15 Jun
5 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
18 Apr – 2 May
8 Jun
4-6 wk
30 May
6 Jul
4 wk after
21 Jun
26 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
2 – 30 Apr
30 May
8-12 wk
25 Jun
25 Jul
8 wk after
Bee balm
Monarda didyma
8 Feb – 8 Mar
21 Apr
8-12 wk
3 May
16 Jun
0 wk
7 Jun
5 wk after
Yarrow
Achillea millefolium
8 – 22 Mar
5 Apr
6-8 wk
3 May
17 May
0 wk
24 May
3 wk after
Safflower
Carthamus tinctorius
3 May
16 Jun
0 wk
7 May
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
8 – 22 Mar
25 May
6-8 wk
3 May
6 Jul
0 wk
15 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
22 Mar – 5 Apr
8 Jun
4-6 wk
3 May
6 Jul
0 wk
24 May
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
23 Mar – 6 Apr
4 Apr
10-12 wk
15 Jun
6 wk after
Sunflower
Helianthus annuus
2 – 9 May
15 Jun
3-4 wk
30 May
6 Jul
4 wk after
7 Jun
26 Jun
5 wk after
China aster
Callistephus chinensis
4 – 18 Apr
4 Jun
6-8 wk
30 May
16 Jul
4 wk after
21 Jun
6 Jul
7 wk after
Annual phlox
Phlox drummondii
23 Mar – 6 Apr
4 Jun
6-8 wk
18 May
16 Jul
2 wk after
21 Jun
6 Jul
7 wk after
Hollyhock
Alcea rosea
8 – 22 Mar
6-8 wk
3 May
0 wk
24 May
3 wk after
Alpine delphinium
Delphinium elatum
8 Feb – 8 Mar
21 Apr
8-12 wk
3 May
16 Jun
0 wk
7 Jun
5 wk after
African marigold
Tagetes erecta
4 – 18 Apr
4 Jun
6-8 wk
30 May
16 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
16 – 30 Mar
25 May
6-8 wk
11 May
6 Jul
1 wk after
21 Jun
26 Jun
7 wk after
Wood sage
Salvia nemorosa
22 Feb – 8 Mar
11 Apr
8-10 wk
3 May
6 Jun
0 wk
7 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
6 Apr – 4 May
24 May
6-10 wk
15 Jun
5 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
3 May
16 Jul
0 wk
7 May
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
21 Mar – 4 Apr
11 May
8-10 wk
30 May
6 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
8 – 22 Mar
5 May
6-8 wk
3 May
16 Jun
0 wk
24 May
6 Jun
3 wk after