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Method
Rel. frost
Last spring frost (0°C) 26 Apr Frost 3 of 4 years · 20 years of data
Frost-free season 166 days 26 Apr – 9 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)
8 – 22 Mar
19 Jun
5-7 wk
26 Apr
24 Jul
0 wk
20 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
15 – 29 Mar
1 Jul
4-6 wk
26 Apr
29 Jul
0 wk
20 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
23 Feb – 23 Mar
16 Apr
8-12 wk
18 May
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
8 – 22 Mar
14 Jun
5-7 wk
26 Apr
19 Jul
0 wk
13 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
4 – 11 May
10 Jun
3-4 wk
1 Jun
1 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
27 Apr – 4 May
11 Jun
4-5 wk
1 Jun
9 Jul
5 wk after
6 Jun
29 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
14 – 21 May
1 Jun
3-4 wk
11 Jun
22 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
1 Feb – 1 Mar
4 Apr
8-12 wk
26 Apr
30 May
0 wk
9 May
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
20 Apr
19 Jun
1 wk before
20 Apr
9 Jun
1 wk before
Maize
Zea mays
20 – 27 Apr
31 May
3-4 wk
18 May
21 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
5 – 12 Apr
8 Jul
3-4 wk
3 May
29 Jul
1 wk after
9 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
26 Apr
9 Jul
0 wk
13 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
8 – 22 Mar
14 Jun
5-7 wk
26 Apr
19 Jul
0 wk
13 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
20 Mar – 3 Apr
9 Jun
4-6 wk
1 May
7 Jul
1 wk after
1 May
27 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
8 – 22 Mar
24 Jun
5-7 wk
26 Apr
29 Jul
0 wk
20 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
4 – 11 May
22 Jun
3-4 wk
1 Jun
13 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
5 – 12 Apr
15 Jun
3-4 wk
3 May
6 Jul
1 wk after
9 May
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
15 – 29 Mar
26 Jun
4-6 wk
26 Apr
24 Jul
0 wk
Lettuce
Lactuca sativa
29 Mar – 5 Apr
13 Jul
3-4 wk
26 Apr
3 Aug
0 wk
20 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
15 – 29 Mar
26 Jun
4-6 wk
26 Apr
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 – 30 Mar
5 Jun
2-4 wk
13 Apr
19 Jun
2 wk before
13 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
20 Apr
19 Jun
1 wk before
20 Apr
9 Jun
1 wk before
Spinach
Spinacia oleracea
29 Mar – 5 Apr
28 Jul
3-4 wk
26 Apr
18 Aug
0 wk
6 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
28 May – 11 Jun
4-6 wk
9 Jul
11 wk after
Garden tomato
Solanum lycopersicum
23 Mar – 6 Apr
10 May
6-8 wk
18 May
21 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
20 Apr – 4 May
24 Jun
2-4 wk
18 May
8 Jul
3 wk after
6 Jun
28 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
15 – 29 Mar
26 Jun
4-6 wk
26 Apr
24 Jul
0 wk
Garden pea
Pisum sativum
29 Mar – 5 Apr
28 Jun
3-4 wk
26 Apr
19 Jul
0 wk
20 Apr
9 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
20 Apr – 4 May
31 May
4-6 wk
1 Jun
28 Jun
5 wk after
Lemon balm
Melissa officinalis
15 Feb – 1 Mar
24 May
8-10 wk
26 Apr
19 Jul
0 wk
22 May
9 Jul
4 wk after
Dill
Anethum graveolens
20 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
1 – 15 Mar
7 Jun
6-8 wk
26 Apr
19 Jul
0 wk
20 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
1 Feb – 1 Mar
24 May
8-12 wk
26 Apr
19 Jul
0 wk
22 May
9 Jul
4 wk after
Coriander
Coriandrum sativum
26 Apr
18 Aug
0 wk
9 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
22 Feb – 8 Mar
9 May
8-10 wk
3 May
4 Jul
1 wk after
Common thyme
Thymus vulgaris
15 Feb – 1 Mar
14 May
8-10 wk
26 Apr
9 Jul
0 wk
Oregano
Origanum vulgare
1 – 15 Mar
28 May
6-8 wk
26 Apr
9 Jul
0 wk
22 May
29 Jun
4 wk after
Parsley
Petroselinum crispum
1 – 15 Mar
28 May
6-8 wk
26 Apr
9 Jul
0 wk
20 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
25 Jan – 22 Feb
10 Apr
10-14 wk
3 May
19 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
4 – 11 May
7 Jun
3-4 wk
1 Jun
28 Jun
5 wk after
Cornflower
Centaurea cyanus
26 Apr
19 Jul
0 wk
20 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
9 – 23 Mar
12 May
8-10 wk
18 May
7 Jul
3 wk after
Sweet William
Dianthus barbatus
1 – 15 Mar
6-8 wk
26 Apr
0 wk
1 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
23 Mar – 6 Apr
26 May
6-8 wk
18 May
7 Jul
3 wk after
9 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Mar
27 May
6-8 wk
11 May
8 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Mar – 24 Apr
10 Jun
4-8 wk
22 May
8 Jul
4 wk after
22 May
28 Jun
4 wk after
Foxglove
Digitalis purpurea
15 Feb – 1 Mar
8-10 wk
26 Apr
0 wk
9 May
2 wk after
Busy lizzie
Impatiens walleriana
9 Mar – 6 Apr
2 Jul
8-12 wk
1 Jun
27 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
23 Mar – 6 Apr
5 Jun
6-8 wk
18 May
17 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
20 Apr – 4 May
1 May
4-6 wk
1 Jun
5 wk after
Chinese lantern
Physalis alkekengi
22 Feb – 8 Mar
24 Apr
8-10 wk
3 May
19 Jun
1 wk after
Love in a mist
Nigella damascena
26 Apr
4 Jul
0 wk
20 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
23 Mar – 6 Apr
16 May
6-8 wk
18 May
27 Jun
3 wk after
9 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
8 Feb – 8 Mar
24 Apr
8-12 wk
3 May
19 Jun
1 wk after
Cardoon
Cynara cardunculus
23 Feb – 23 Mar
25 Mar
8-12 wk
18 May
20 May
3 wk after
Regal-foxtail
Ptilotus nobilis
9 Mar – 6 Apr
23 Apr
8-12 wk
1 Jun
18 Jun
5 wk after
Globe amaranth
Gomphrena globosa
6 – 20 Apr
7 May
6-8 wk
1 Jun
18 Jun
5 wk after
Corn poppy
Papaver rhoeas
26 Apr
19 Jul
0 wk
20 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
1 Feb – 1 Mar
14 May
8-12 wk
26 Apr
9 Jul
0 wk
1 May
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
23 Mar – 6 Apr
22 May
8-10 wk
1 Jun
17 Jul
5 wk after
Sweet pea
Lathyrus odoratus
1 – 22 Mar
4 Jun
5-8 wk
26 Apr
9 Jul
0 wk
Stock
Matthiola incana
1 – 15 Mar
7 Jun
6-8 wk
26 Apr
19 Jul
0 wk
9 May
9 Jul
2 wk after
Wormwood
Artemisia absinthium
1 – 15 Mar
8 May
6-8 wk
26 Apr
19 Jun
0 wk
9 May
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
20 Apr – 4 May
16 May
4-6 wk
1 Jun
13 Jun
5 wk after
Garden pansy
Viola × wittrockiana
15 Feb – 1 Mar
24 May
8-10 wk
26 Apr
19 Jul
0 wk
1 May
9 Jul
1 wk after
Petunia
Petunia
23 Feb – 23 Mar
12 May
8-12 wk
18 May
7 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
8 – 22 Mar
8 May
6-8 wk
3 May
19 Jun
1 wk after
6 Jun
9 Jun
6 wk after
Common zinnia
Zinnia elegans
6 – 20 Apr
14 Jun
4-6 wk
18 May
12 Jul
3 wk after
Common morning glory
Ipomoea purpurea
27 Apr – 11 May
7 Jun
3-5 wk
1 Jun
28 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
6 – 20 Apr
10 Jun
4-6 wk
18 May
8 Jul
3 wk after
6 Jun
28 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
26 Mar – 23 Apr
23 May
8-12 wk
18 Jun
18 Jul
8 wk after
Bee balm
Monarda didyma
1 Feb – 1 Mar
24 Apr
8-12 wk
26 Apr
19 Jun
0 wk
22 May
9 Jun
4 wk after
Yarrow
Achillea millefolium
1 – 15 Mar
8 Apr
6-8 wk
26 Apr
20 May
0 wk
9 May
10 May
2 wk after
Safflower
Carthamus tinctorius
26 Apr
19 Jun
0 wk
20 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
1 – 15 Mar
28 May
6-8 wk
26 Apr
9 Jul
0 wk
11 Mar
29 Jun
7 wk before
Bishop's flower
Ammi majus
15 – 29 Mar
11 Jun
4-6 wk
26 Apr
9 Jul
0 wk
9 May
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
9 – 23 Mar
3 Apr
10-12 wk
1 Jun
12 Jun
5 wk after
Sunflower
Helianthus annuus
20 – 27 Apr
18 Jun
3-4 wk
18 May
9 Jul
3 wk after
22 May
29 Jun
4 wk after
China aster
Callistephus chinensis
23 Mar – 6 Apr
7 Jun
6-8 wk
18 May
19 Jul
3 wk after
6 Jun
9 Jul
6 wk after
Annual phlox
Phlox drummondii
14 – 28 Mar
5 Jun
6-8 wk
9 May
17 Jul
2 wk after
6 Jun
7 Jul
6 wk after
Hollyhock
Alcea rosea
1 – 15 Mar
6-8 wk
26 Apr
0 wk
9 May
2 wk after
Alpine delphinium
Delphinium elatum
1 Feb – 1 Mar
24 Apr
8-12 wk
26 Apr
19 Jun
0 wk
22 May
9 Jun
4 wk after
African marigold
Tagetes erecta
23 Mar – 6 Apr
5 Jun
6-8 wk
18 May
17 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
8 – 22 Mar
28 May
6-8 wk
3 May
9 Jul
1 wk after
6 Jun
29 Jun
6 wk after
Wood sage
Salvia nemorosa
15 Feb – 1 Mar
14 Apr
8-10 wk
26 Apr
9 Jun
0 wk
22 May
30 May
4 wk after
Black-eyed susan vine
Thunbergia alata
23 Mar – 20 Apr
17 May
6-10 wk
1 Jun
28 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
26 Apr
19 Jul
0 wk
20 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
9 – 23 Mar
14 May
8-10 wk
18 May
9 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
1 – 15 Mar
8 May
6-8 wk
26 Apr
19 Jun
0 wk
9 May
9 Jun
2 wk after