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Method
Rel. frost
Last spring frost (0°C) 17 Apr Normal year · 20 years of data
Frost-free season 212 days 17 Apr – 15 Nov
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)
27 Feb – 13 Mar
17 Jun
5-7 wk
17 Apr
22 Jul
0 wk
10 Apr
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Mar
29 Jun
4-6 wk
17 Apr
27 Jul
0 wk
10 Apr
17 Jul
1 wk before
Chili pepper
Capsicum annuum
28 Feb – 28 Mar
15 Apr
8-12 wk
23 May
10 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Feb – 13 Mar
12 Jun
5-7 wk
17 Apr
17 Jul
0 wk
5 Apr
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
25 Apr – 2 May
17 Jun
3-4 wk
23 May
8 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
18 – 25 Apr
9 Jun
4-5 wk
23 May
7 Jul
5 wk after
23 May
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
16 – 23 May
2 Jun
3-4 wk
13 Jun
23 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Jan – 20 Feb
2 Apr
8-12 wk
17 Apr
28 May
0 wk
27 Apr
18 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
10 Apr
17 Jun
1 wk before
10 Apr
7 Jun
1 wk before
Maize
Zea mays
8 – 15 Apr
7 Jun
3-4 wk
6 May
28 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Mar – 2 Apr
6 Jul
3-4 wk
23 Apr
27 Jul
1 wk after
27 Apr
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
17 Apr
7 Jul
0 wk
5 Apr
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Feb – 13 Mar
12 Jun
5-7 wk
17 Apr
17 Jul
0 wk
5 Apr
7 Jul
2 wk before
Potato
Solanum tuberosum
11 – 25 Mar
9 Jun
4-6 wk
22 Apr
7 Jul
1 wk after
22 Apr
27 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Feb – 13 Mar
22 Jun
5-7 wk
17 Apr
27 Jul
0 wk
10 Apr
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
25 Apr – 2 May
7 Jul
3-4 wk
23 May
28 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Mar – 2 Apr
23 Jun
3-4 wk
23 Apr
14 Jul
1 wk after
27 Apr
4 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Mar
24 Jun
4-6 wk
17 Apr
22 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Mar
11 Jul
3-4 wk
17 Apr
1 Aug
0 wk
10 Apr
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Mar
24 Jun
4-6 wk
17 Apr
22 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
8 – 22 Mar
3 Jun
2-4 wk
5 Apr
17 Jun
2 wk before
5 Apr
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
10 Apr
17 Jun
1 wk before
10 Apr
7 Jun
1 wk before
Spinach
Spinacia oleracea
20 – 27 Mar
26 Jul
3-4 wk
17 Apr
16 Aug
0 wk
30 Mar
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
14 – 28 May
4-6 wk
25 Jun
10 wk after
Garden tomato
Solanum lycopersicum
11 – 25 Mar
17 May
6-8 wk
6 May
28 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
8 – 22 Apr
9 Jul
2-4 wk
6 May
23 Jul
3 wk after
23 May
13 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Mar
24 Jun
4-6 wk
17 Apr
22 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Mar
26 Jun
3-4 wk
17 Apr
17 Jul
0 wk
10 Apr
7 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
11 – 25 Apr
15 Jun
4-6 wk
23 May
13 Jul
5 wk after
Lemon balm
Melissa officinalis
6 – 20 Feb
22 May
8-10 wk
17 Apr
17 Jul
0 wk
8 May
7 Jul
3 wk after
Dill
Anethum graveolens
10 Apr
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
20 Feb – 6 Mar
5 Jun
6-8 wk
17 Apr
17 Jul
0 wk
10 Apr
7 Jul
1 wk before
Spearmint
Mentha spicata
23 Jan – 20 Feb
22 May
8-12 wk
17 Apr
17 Jul
0 wk
8 May
7 Jul
3 wk after
Coriander
Coriandrum sativum
17 Apr
16 Aug
0 wk
27 Apr
6 Aug
1 wk after
Garden sage
Salvia officinalis
12 – 26 Feb
7 May
8-10 wk
23 Apr
2 Jul
1 wk after
Common thyme
Thymus vulgaris
6 – 20 Feb
12 May
8-10 wk
17 Apr
7 Jul
0 wk
Oregano
Origanum vulgare
20 Feb – 6 Mar
26 May
6-8 wk
17 Apr
7 Jul
0 wk
8 May
27 Jun
3 wk after
Parsley
Petroselinum crispum
20 Feb – 6 Mar
26 May
6-8 wk
17 Apr
7 Jul
0 wk
10 Apr
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
15 Jan – 12 Feb
8 Apr
10-14 wk
23 Apr
17 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
25 Apr – 2 May
22 Jun
3-4 wk
23 May
13 Jul
5 wk after
Cornflower
Centaurea cyanus
17 Apr
17 Jul
0 wk
10 Apr
7 Jul
1 wk before
Statice
Limonium sinuatum
25 Feb – 11 Mar
12 May
8-10 wk
6 May
7 Jul
3 wk after
Sweet William
Dianthus barbatus
20 Feb – 6 Mar
6-8 wk
17 Apr
0 wk
22 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
11 – 25 Mar
26 May
6-8 wk
6 May
7 Jul
3 wk after
25 Jun
27 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
6 – 20 Mar
26 May
6-8 wk
1 May
7 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
13 Mar – 10 Apr
9 Jun
4-8 wk
8 May
7 Jul
3 wk after
8 May
27 Jun
3 wk after
Foxglove
Digitalis purpurea
6 – 20 Feb
8-10 wk
17 Apr
0 wk
27 Apr
1 wk after
Busy lizzie
Impatiens walleriana
28 Feb – 28 Mar
7 Jul
8-12 wk
23 May
1 Sep
5 wk after
Creeping zinnia
Sanvitalia procumbens
11 – 25 Mar
5 Jun
6-8 wk
6 May
17 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
11 – 25 Apr
16 May
4-6 wk
23 May
13 Jun
5 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Feb
22 Apr
8-10 wk
23 Apr
17 Jun
1 wk after
Love in a mist
Nigella damascena
17 Apr
2 Jul
0 wk
10 Apr
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
11 – 25 Mar
16 May
6-8 wk
6 May
27 Jun
3 wk after
25 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
29 Jan – 26 Feb
22 Apr
8-12 wk
23 Apr
17 Jun
1 wk after
Cardoon
Cynara cardunculus
11 Feb – 11 Mar
23 Mar
8-12 wk
6 May
18 May
3 wk after
Regal-foxtail
Ptilotus nobilis
28 Feb – 28 Mar
8 May
8-12 wk
23 May
3 Jul
5 wk after
Globe amaranth
Gomphrena globosa
28 Mar – 11 Apr
22 May
6-8 wk
23 May
3 Jul
5 wk after
Corn poppy
Papaver rhoeas
17 Apr
17 Jul
0 wk
10 Apr
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
23 Jan – 20 Feb
12 May
8-12 wk
17 Apr
7 Jul
0 wk
22 Apr
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
14 – 28 Mar
22 May
8-10 wk
23 May
17 Jul
5 wk after
Sweet pea
Lathyrus odoratus
20 Feb – 13 Mar
2 Jun
5-8 wk
17 Apr
7 Jul
0 wk
Stock
Matthiola incana
20 Feb – 6 Mar
5 Jun
6-8 wk
17 Apr
17 Jul
0 wk
27 Apr
7 Jul
1 wk after
Wormwood
Artemisia absinthium
20 Feb – 6 Mar
6 May
6-8 wk
17 Apr
17 Jun
0 wk
27 Apr
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
11 – 25 Apr
31 May
4-6 wk
23 May
28 Jun
5 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Feb
22 May
8-10 wk
17 Apr
17 Jul
0 wk
22 Apr
7 Jul
1 wk after
Petunia
Petunia
11 Feb – 11 Mar
12 May
8-12 wk
6 May
7 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
26 Feb – 12 Mar
6 May
6-8 wk
23 Apr
17 Jun
1 wk after
23 May
7 Jun
5 wk after
Common zinnia
Zinnia elegans
25 Mar – 8 Apr
19 Jun
4-6 wk
6 May
17 Jul
3 wk after
Common morning glory
Ipomoea purpurea
18 Apr – 2 May
22 Jun
3-5 wk
23 May
13 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
25 Mar – 8 Apr
9 Jun
4-6 wk
6 May
7 Jul
3 wk after
23 May
27 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
12 Mar – 9 Apr
7 Jun
8-12 wk
4 Jun
2 Aug
7 wk after
Bee balm
Monarda didyma
23 Jan – 20 Feb
22 Apr
8-12 wk
17 Apr
17 Jun
0 wk
8 May
7 Jun
3 wk after
Yarrow
Achillea millefolium
20 Feb – 6 Mar
6 Apr
6-8 wk
17 Apr
18 May
0 wk
27 Apr
8 May
1 wk after
Safflower
Carthamus tinctorius
17 Apr
17 Jun
0 wk
10 Apr
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
20 Feb – 6 Mar
26 May
6-8 wk
17 Apr
7 Jul
0 wk
9 Mar
27 Jun
6 wk before
Bishop's flower
Ammi majus
6 – 20 Mar
9 Jun
4-6 wk
17 Apr
7 Jul
0 wk
27 Apr
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
28 Feb – 14 Mar
8 Apr
10-12 wk
23 May
17 Jun
5 wk after
Sunflower
Helianthus annuus
8 – 15 Apr
16 Jun
3-4 wk
6 May
7 Jul
3 wk after
8 May
27 Jun
3 wk after
China aster
Callistephus chinensis
11 – 25 Mar
5 Jun
6-8 wk
6 May
17 Jul
3 wk after
23 May
7 Jul
5 wk after
Annual phlox
Phlox drummondii
3 – 17 Mar
5 Jun
6-8 wk
28 Apr
17 Jul
2 wk after
23 May
7 Jul
5 wk after
Hollyhock
Alcea rosea
20 Feb – 6 Mar
6-8 wk
17 Apr
0 wk
27 Apr
1 wk after
Alpine delphinium
Delphinium elatum
23 Jan – 20 Feb
22 Apr
8-12 wk
17 Apr
17 Jun
0 wk
8 May
7 Jun
3 wk after
African marigold
Tagetes erecta
11 – 25 Mar
5 Jun
6-8 wk
6 May
17 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
26 Feb – 12 Mar
26 May
6-8 wk
23 Apr
7 Jul
1 wk after
23 May
27 Jun
5 wk after
Wood sage
Salvia nemorosa
6 – 20 Feb
12 Apr
8-10 wk
17 Apr
7 Jun
0 wk
8 May
28 May
3 wk after
Black-eyed susan vine
Thunbergia alata
14 Mar – 11 Apr
1 Jun
6-10 wk
23 May
13 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
17 Apr
17 Jul
0 wk
10 Apr
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
25 Feb – 11 Mar
12 May
8-10 wk
6 May
7 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
20 Feb – 6 Mar
6 May
6-8 wk
17 Apr
17 Jun
0 wk
27 Apr
7 Jun
1 wk after