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Method
Rel. frost
Last spring frost (0°C) 3 May Frost 3 of 4 years · 20 years of data
Frost-free season 147 days 3 May – 27 Sep
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)
15 – 29 Mar
14 Jun
5-7 wk
3 May
19 Jul
0 wk
7 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
22 Mar – 5 Apr
26 Jun
4-6 wk
3 May
24 Jul
0 wk
7 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
2 – 30 Mar
29 Mar
8-12 wk
25 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
15 – 29 Mar
9 Jun
5-7 wk
3 May
14 Jul
0 wk
3 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
11 – 18 May
23 May
3-4 wk
8 Jun
13 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
4 – 11 May
2 Jun
4-5 wk
8 Jun
30 Jun
5 wk after
21 Jun
7 wk after
Butter bean
Phaseolus lunatus
Greenhouse
21 – 28 May
3-4 wk
18 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
8 Feb – 8 Mar
30 Mar
8-12 wk
3 May
25 May
0 wk
24 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
7 May
14 Jun
1 wk after
7 May
4 Jun
1 wk after
Maize
Zea mays
27 Apr – 4 May
13 May
3-4 wk
25 May
3 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
12 – 19 Apr
3 Jul
3-4 wk
10 May
24 Jul
1 wk after
24 May
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 May
4 Jul
0 wk
3 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
15 – 29 Mar
9 Jun
5-7 wk
3 May
14 Jul
0 wk
3 May
4 Jul
0 wk
Potato
Solanum tuberosum
7 – 21 Apr
27 May
4-6 wk
19 May
24 Jun
2 wk after
19 May
14 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
15 – 29 Mar
19 Jun
5-7 wk
3 May
24 Jul
0 wk
7 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
11 – 18 May
15 Jun
3-4 wk
8 Jun
6 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
12 – 19 Apr
1 Jun
3-4 wk
10 May
22 Jun
1 wk after
24 May
12 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
22 Mar – 5 Apr
21 Jun
4-6 wk
3 May
19 Jul
0 wk
Lettuce
Lactuca sativa
5 – 12 Apr
8 Jul
3-4 wk
3 May
29 Jul
0 wk
7 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
22 Mar – 5 Apr
21 Jun
4-6 wk
3 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
31 May
2-4 wk
3 May
14 Jun
0 wk
3 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
7 May
14 Jun
1 wk after
7 May
4 Jun
1 wk after
Spinach
Spinacia oleracea
5 – 12 Apr
23 Jul
3-4 wk
3 May
13 Aug
0 wk
29 Apr
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
11 wk after
Garden tomato
Solanum lycopersicum
30 Mar – 13 Apr
22 Apr
6-8 wk
25 May
3 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
27 Apr – 11 May
17 Jun
2-4 wk
25 May
1 Jul
3 wk after
21 Jun
21 Jun
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
22 Mar – 5 Apr
21 Jun
4-6 wk
3 May
19 Jul
0 wk
Garden pea
Pisum sativum
5 – 12 Apr
23 Jun
3-4 wk
3 May
14 Jul
0 wk
7 May
4 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
27 Apr – 11 May
24 May
4-6 wk
8 Jun
21 Jun
5 wk after
Lemon balm
Melissa officinalis
22 Feb – 8 Mar
19 May
8-10 wk
3 May
14 Jul
0 wk
7 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
7 May
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
8 – 22 Mar
2 Jun
6-8 wk
3 May
14 Jul
0 wk
7 May
4 Jul
1 wk after
Spearmint
Mentha spicata
8 Feb – 8 Mar
19 May
8-12 wk
3 May
14 Jul
0 wk
7 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
3 May
13 Aug
0 wk
24 May
3 Aug
3 wk after
Garden sage
Salvia officinalis
1 – 15 Mar
4 May
8-10 wk
10 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
22 Feb – 8 Mar
9 May
8-10 wk
3 May
4 Jul
0 wk
Oregano
Origanum vulgare
8 – 22 Mar
23 May
6-8 wk
3 May
4 Jul
0 wk
7 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
8 – 22 Mar
23 May
6-8 wk
3 May
4 Jul
0 wk
7 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
1 Feb – 1 Mar
5 Apr
10-14 wk
10 May
14 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
11 – 18 May
31 May
3-4 wk
8 Jun
21 Jun
5 wk after
Cornflower
Centaurea cyanus
3 May
14 Jul
0 wk
7 May
4 Jul
1 wk after
Statice
Limonium sinuatum
16 – 30 Mar
27 Apr
8-10 wk
25 May
22 Jun
3 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
30 Mar – 13 Apr
11 May
6-8 wk
25 May
22 Jun
3 wk after
16 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
23 Mar – 6 Apr
15 May
6-8 wk
18 May
26 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
29 May
4-8 wk
7 Jun
26 Jun
5 wk after
7 Jun
16 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
16 Mar – 13 Apr
17 Jun
8-12 wk
8 Jun
12 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
30 Mar – 13 Apr
21 May
6-8 wk
25 May
2 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
13 – 27 Apr
30 Apr
4-6 wk
25 May
28 May
3 wk after
Chinese lantern
Physalis alkekengi
1 – 15 Mar
19 Apr
8-10 wk
10 May
14 Jun
1 wk after
Love in a mist
Nigella damascena
3 May
29 Jun
0 wk
7 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
30 Mar – 13 Apr
1 May
6-8 wk
25 May
12 Jun
3 wk after
16 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
15 Feb – 15 Mar
19 Apr
8-12 wk
10 May
14 Jun
1 wk after
Cardoon
Cynara cardunculus
2 – 30 Mar
20 Mar
8-12 wk
25 May
3 wk after
Regal-foxtail
Ptilotus nobilis
16 Mar – 13 Apr
16 Apr
8-12 wk
8 Jun
11 Jun
5 wk after
Globe amaranth
Gomphrena globosa
13 – 27 Apr
30 Apr
6-8 wk
8 Jun
11 Jun
5 wk after
Corn poppy
Papaver rhoeas
3 May
14 Jul
0 wk
7 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
8 Feb – 8 Mar
9 May
8-12 wk
3 May
4 Jul
0 wk
19 May
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
30 Mar – 13 Apr
7 May
8-10 wk
8 Jun
2 Jul
5 wk after
Sweet pea
Lathyrus odoratus
8 – 29 Mar
30 May
5-8 wk
3 May
4 Jul
0 wk
Stock
Matthiola incana
8 – 22 Mar
2 Jun
6-8 wk
3 May
14 Jul
0 wk
24 May
4 Jul
3 wk after
Wormwood
Artemisia absinthium
8 – 22 Mar
3 May
6-8 wk
3 May
14 Jun
0 wk
24 May
4 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
27 Apr – 11 May
9 May
4-6 wk
8 Jun
5 wk after
Garden pansy
Viola × wittrockiana
22 Feb – 8 Mar
19 May
8-10 wk
3 May
14 Jul
0 wk
19 May
4 Jul
2 wk after
Petunia
Petunia
2 – 30 Mar
27 Apr
8-12 wk
25 May
22 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
15 – 29 Mar
3 May
6-8 wk
10 May
14 Jun
1 wk after
21 Jun
7 wk after
Common zinnia
Zinnia elegans
13 – 27 Apr
30 May
4-6 wk
25 May
27 Jun
3 wk after
Common morning glory
Ipomoea purpurea
4 – 18 May
31 May
3-5 wk
8 Jun
21 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
13 – 27 Apr
29 May
4-6 wk
25 May
26 Jun
3 wk after
21 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
2 – 30 Apr
16 May
8-12 wk
25 Jun
11 Jul
8 wk after
Bee balm
Monarda didyma
8 Feb – 8 Mar
19 Apr
8-12 wk
3 May
14 Jun
0 wk
7 Jun
5 wk after
Yarrow
Achillea millefolium
8 – 22 Mar
3 Apr
6-8 wk
3 May
15 May
0 wk
24 May
3 wk after
Safflower
Carthamus tinctorius
3 May
14 Jun
0 wk
7 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
8 – 22 Mar
23 May
6-8 wk
3 May
4 Jul
0 wk
15 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
22 Mar – 5 Apr
6 Jun
4-6 wk
3 May
4 Jul
0 wk
24 May
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
2 – 16 Mar
28 Mar
10-12 wk
25 May
6 Jun
3 wk after
Sunflower
Helianthus annuus
27 Apr – 4 May
13 Jun
3-4 wk
25 May
4 Jul
3 wk after
7 Jun
24 Jun
5 wk after
China aster
Callistephus chinensis
30 Mar – 13 Apr
2 Jun
6-8 wk
25 May
14 Jul
3 wk after
21 Jun
4 Jul
7 wk after
Annual phlox
Phlox drummondii
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
2 wk after
21 Jun
22 Jun
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
19 Apr
8-12 wk
3 May
14 Jun
0 wk
7 Jun
5 wk after
African marigold
Tagetes erecta
30 Mar – 13 Apr
21 May
6-8 wk
25 May
2 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
15 – 29 Mar
23 May
6-8 wk
10 May
4 Jul
1 wk after
21 Jun
24 Jun
7 wk after
Wood sage
Salvia nemorosa
22 Feb – 8 Mar
9 Apr
8-10 wk
3 May
4 Jun
0 wk
7 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
30 Mar – 27 Apr
10 May
6-10 wk
8 Jun
21 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
3 May
14 Jul
0 wk
7 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
16 – 30 Mar
5 May
8-10 wk
25 May
30 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
8 – 22 Mar
3 May
6-8 wk
3 May
14 Jun
0 wk
24 May
4 Jun
3 wk after