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Rel. frost
Last spring frost (0°C) 1 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 198 days 1 Apr – 16 Oct
Probability that frost is over

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