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Method
Rel. frost
Last spring frost (0°C) 30 Apr Frost 3 of 4 years · 20 years of data
Frost-free season 165 days 30 Apr – 12 Oct
Probability that frost is over

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