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Method
Rel. frost
Last spring frost (0°C) 4 May Frost 1 of 10 years · 20 years of data
Frost-free season 202 days 4 May – 22 Nov
Probability that frost is over

90% = 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)
16 – 30 Mar
21 Jun
5-7 wk
4 May
26 Jul
0 wk
28 Apr
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
23 Mar – 6 Apr
3 Jul
4-6 wk
4 May
31 Jul
0 wk
28 Apr
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
27 Feb – 27 Mar
16 Apr
8-12 wk
22 May
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 – 30 Mar
16 Jun
5-7 wk
4 May
21 Jul
0 wk
21 Apr
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
3 – 10 May
10 Jun
3-4 wk
31 May
1 Jul
4 wk after
Florence Fennel
Foeniculum vulgare
10 – 17 May
13 Jun
4-5 wk
14 Jun
11 Jul
6 wk after
14 Jun
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
27 May – 3 Jun
29 May
3-4 wk
24 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
9 Feb – 9 Mar
6 Apr
8-12 wk
4 May
1 Jun
0 wk
17 May
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
28 Apr
21 Jun
1 wk before
28 Apr
11 Jun
1 wk before
Maize
Zea mays
Fleece
24 Apr – 1 May
31 May
3-4 wk
22 May
21 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 Apr
10 Jul
3-4 wk
4 May
31 Jul
0 wk
17 May
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 May
11 Jul
0 wk
21 Apr
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 – 30 Mar
16 Jun
5-7 wk
4 May
21 Jul
0 wk
21 Apr
11 Jul
2 wk before
Potato
Solanum tuberosum
28 Mar – 11 Apr
13 Jun
4-6 wk
9 May
11 Jul
1 wk after
9 May
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 – 30 Mar
26 Jun
5-7 wk
4 May
31 Jul
0 wk
28 Apr
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
17 – 24 May
15 Jun
3-4 wk
14 Jun
6 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 Apr
10 Jul
3-4 wk
4 May
31 Jul
0 wk
17 May
21 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Mar – 6 Apr
28 Jun
4-6 wk
4 May
26 Jul
0 wk
Lettuce
Lactuca sativa
6 – 13 Apr
15 Jul
3-4 wk
4 May
5 Aug
0 wk
28 Apr
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Mar – 6 Apr
28 Jun
4-6 wk
4 May
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Mar – 7 Apr
7 Jun
2-4 wk
21 Apr
21 Jun
2 wk before
21 Apr
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
28 Apr
21 Jun
1 wk before
28 Apr
11 Jun
1 wk before
Spinach
Spinacia oleracea
6 – 13 Apr
30 Jul
3-4 wk
4 May
20 Aug
0 wk
14 Apr
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
5 – 19 Jun
4-6 wk
17 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
27 Mar – 10 Apr
10 May
6-8 wk
22 May
21 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 May
17 Jun
2-4 wk
31 May
1 Jul
4 wk after
14 Jun
21 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Mar – 6 Apr
28 Jun
4-6 wk
4 May
26 Jul
0 wk
Garden pea
Pisum sativum
6 – 13 Apr
30 Jun
3-4 wk
4 May
21 Jul
0 wk
28 Apr
11 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
3 – 17 May
24 May
4-6 wk
14 Jun
21 Jun
6 wk after
Lemon balm
Melissa officinalis
23 Feb – 9 Mar
26 May
8-10 wk
4 May
21 Jul
0 wk
30 May
11 Jul
4 wk after
Dill
Anethum graveolens
28 Apr
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
9 – 23 Mar
9 Jun
6-8 wk
4 May
21 Jul
0 wk
28 Apr
11 Jul
1 wk before
Spearmint
Mentha spicata
9 Feb – 9 Mar
26 May
8-12 wk
4 May
21 Jul
0 wk
30 May
11 Jul
4 wk after
Coriander
Coriandrum sativum
4 May
20 Aug
0 wk
17 May
10 Aug
2 wk after
Garden sage
Salvia officinalis
23 Feb – 9 Mar
11 May
8-10 wk
4 May
6 Jul
0 wk
Common thyme
Thymus vulgaris
23 Feb – 9 Mar
16 May
8-10 wk
4 May
11 Jul
0 wk
Oregano
Origanum vulgare
9 – 23 Mar
30 May
6-8 wk
4 May
11 Jul
0 wk
30 May
1 Jul
4 wk after
Parsley
Petroselinum crispum
9 – 23 Mar
30 May
6-8 wk
4 May
11 Jul
0 wk
28 Apr
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
26 Jan – 23 Feb
12 Apr
10-14 wk
4 May
21 Jun
0 wk

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
17 – 24 May
31 May
3-4 wk
14 Jun
21 Jun
6 wk after
Cornflower
Centaurea cyanus
4 May
21 Jul
0 wk
28 Apr
11 Jul
1 wk before
Statice
Limonium sinuatum
22 Mar – 5 Apr
7 May
8-10 wk
31 May
2 Jul
4 wk after
Sweet William
Dianthus barbatus
9 – 23 Mar
6-8 wk
4 May
0 wk
9 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
5 – 19 Apr
21 May
6-8 wk
31 May
2 Jul
4 wk after
17 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
30 May
6-8 wk
26 May
11 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
4 Apr – 2 May
13 Jun
4-8 wk
30 May
11 Jul
4 wk after
30 May
1 Jul
4 wk after
Foxglove
Digitalis purpurea
23 Feb – 9 Mar
8-10 wk
4 May
0 wk
17 May
2 wk after
Busy lizzie
Impatiens walleriana
22 Mar – 19 Apr
29 Jun
8-12 wk
14 Jun
24 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
5 – 19 Apr
31 May
6-8 wk
31 May
12 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
19 Apr – 3 May
12 May
4-6 wk
31 May
9 Jun
4 wk after
Chinese lantern
Physalis alkekengi
23 Feb – 9 Mar
26 Apr
8-10 wk
4 May
21 Jun
0 wk
Love in a mist
Nigella damascena
4 May
6 Jul
0 wk
28 Apr
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
5 – 19 Apr
11 May
6-8 wk
31 May
22 Jun
4 wk after
17 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
9 Feb – 9 Mar
26 Apr
8-12 wk
4 May
21 Jun
0 wk
Cardoon
Cynara cardunculus
8 Mar – 5 Apr
27 Mar
8-12 wk
31 May
4 wk after
Regal-foxtail
Ptilotus nobilis
22 Mar – 19 Apr
16 Apr
8-12 wk
14 Jun
6 wk after
Globe amaranth
Gomphrena globosa
19 Apr – 3 May
30 Apr
6-8 wk
14 Jun
6 wk after
Corn poppy
Papaver rhoeas
4 May
21 Jul
0 wk
28 Apr
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
9 Feb – 9 Mar
16 May
8-12 wk
4 May
11 Jul
0 wk
9 May
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
5 – 19 Apr
17 May
8-10 wk
14 Jun
12 Jul
6 wk after
Sweet pea
Lathyrus odoratus
9 – 30 Mar
6 Jun
5-8 wk
4 May
11 Jul
0 wk
Stock
Matthiola incana
9 – 23 Mar
9 Jun
6-8 wk
4 May
21 Jul
0 wk
17 May
11 Jul
2 wk after
Wormwood
Artemisia absinthium
9 – 23 Mar
10 May
6-8 wk
4 May
21 Jun
0 wk
17 May
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
3 – 17 May
9 May
4-6 wk
14 Jun
6 wk after
Garden pansy
Viola × wittrockiana
23 Feb – 9 Mar
26 May
8-10 wk
4 May
21 Jul
0 wk
9 May
11 Jul
1 wk after
Petunia
Petunia
8 Mar – 5 Apr
7 May
8-12 wk
31 May
2 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
9 – 23 Mar
10 May
6-8 wk
4 May
21 Jun
0 wk
14 Jun
6 wk after
Common zinnia
Zinnia elegans
19 Apr – 3 May
11 Jun
4-6 wk
31 May
9 Jul
4 wk after
Common morning glory
Ipomoea purpurea
10 – 24 May
31 May
3-5 wk
14 Jun
21 Jun
6 wk after
Garden cosmos
Cosmos bipinnatus
19 Apr – 3 May
13 Jun
4-6 wk
31 May
11 Jul
4 wk after
14 Jun
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
9 Apr – 7 May
16 May
8-12 wk
2 Jul
11 Jul
8 wk after
Bee balm
Monarda didyma
9 Feb – 9 Mar
26 Apr
8-12 wk
4 May
21 Jun
0 wk
30 May
11 Jun
4 wk after
Yarrow
Achillea millefolium
9 – 23 Mar
10 Apr
6-8 wk
4 May
22 May
0 wk
17 May
2 wk after
Safflower
Carthamus tinctorius
4 May
21 Jun
0 wk
28 Apr
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
9 – 23 Mar
30 May
6-8 wk
4 May
11 Jul
0 wk
19 Mar
1 Jul
7 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
13 Jun
4-6 wk
4 May
11 Jul
0 wk
17 May
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
22 Mar – 5 Apr
31 Mar
10-12 wk
14 Jun
6 wk after
Sunflower
Helianthus annuus
3 – 10 May
20 Jun
3-4 wk
31 May
11 Jul
4 wk after
30 May
1 Jul
4 wk after
China aster
Callistephus chinensis
5 – 19 Apr
9 Jun
6-8 wk
31 May
21 Jul
4 wk after
14 Jun
11 Jul
6 wk after
Annual phlox
Phlox drummondii
27 Mar – 10 Apr
31 May
6-8 wk
22 May
12 Jul
3 wk after
14 Jun
2 Jul
6 wk after
Hollyhock
Alcea rosea
9 – 23 Mar
6-8 wk
4 May
0 wk
17 May
2 wk after
Alpine delphinium
Delphinium elatum
9 Feb – 9 Mar
26 Apr
8-12 wk
4 May
21 Jun
0 wk
30 May
11 Jun
4 wk after
African marigold
Tagetes erecta
5 – 19 Apr
31 May
6-8 wk
31 May
12 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
9 – 23 Mar
30 May
6-8 wk
4 May
11 Jul
0 wk
14 Jun
1 Jul
6 wk after
Wood sage
Salvia nemorosa
23 Feb – 9 Mar
16 Apr
8-10 wk
4 May
11 Jun
0 wk
30 May
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
5 Apr – 3 May
10 May
6-10 wk
14 Jun
21 Jun
6 wk after
California goldenpoppy
Eschscholzia californica
4 May
21 Jul
0 wk
28 Apr
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
16 May
8-10 wk
31 May
11 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Mar
10 May
6-8 wk
4 May
21 Jun
0 wk
17 May
11 Jun
2 wk after