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