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Rel. frost
Last spring frost (0°C) 15 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 167 days 15 Apr – 29 Sep
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)
25 Feb – 11 Mar
19 Jun
5-7 wk
15 Apr
24 Jul
0 wk
9 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
4 – 18 Mar
1 Jul
4-6 wk
15 Apr
29 Jul
0 wk
9 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
8 Feb – 8 Mar
8-12 wk
3 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
25 Feb – 11 Mar
14 Jun
5-7 wk
15 Apr
19 Jul
0 wk
2 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
5 – 12 Apr
16 May
3-4 wk
3 May
6 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 Apr
7 Jun
4-5 wk
26 May
5 Jul
6 wk after
26 May
25 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
8 – 15 May
3-4 wk
5 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Jan – 18 Feb
4 Apr
8-12 wk
15 Apr
30 May
0 wk
28 Apr
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
9 Apr
19 Jun
1 wk before
9 Apr
9 Jun
1 wk before
Maize
Zea mays
Greenhouse
18 – 25 Mar
6 May
3-4 wk
15 Apr
27 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
18 – 25 Mar
8 Jul
3-4 wk
15 Apr
29 Jul
0 wk
28 Apr
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 Apr
9 Jul
0 wk
2 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
25 Feb – 11 Mar
14 Jun
5-7 wk
15 Apr
19 Jul
0 wk
2 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
9 – 23 Mar
7 Jun
4-6 wk
20 Apr
5 Jul
1 wk after
20 Apr
25 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
25 Feb – 11 Mar
24 Jun
5-7 wk
15 Apr
29 Jul
0 wk
9 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
14 – 21 Apr
21 May
3-4 wk
12 May
11 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
18 – 25 Mar
17 Jun
3-4 wk
15 Apr
8 Jul
0 wk
28 Apr
28 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
4 – 18 Mar
26 Jun
4-6 wk
15 Apr
24 Jul
0 wk
Lettuce
Lactuca sativa
18 – 25 Mar
13 Jul
3-4 wk
15 Apr
3 Aug
0 wk
9 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Mar
26 Jun
4-6 wk
15 Apr
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Mar
5 Jun
2-4 wk
2 Apr
19 Jun
2 wk before
2 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
9 Apr
19 Jun
1 wk before
9 Apr
9 Jun
1 wk before
Spinach
Spinacia oleracea
18 – 25 Mar
28 Jul
3-4 wk
15 Apr
18 Aug
0 wk
26 Mar
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
17 – 31 May
4-6 wk
28 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
18 Feb – 4 Mar
15 Apr
6-8 wk
15 Apr
27 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
5 – 19 Apr
23 May
2-4 wk
3 May
6 Jun
3 wk after
11 May
27 May
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
4 – 18 Mar
26 Jun
4-6 wk
15 Apr
24 Jul
0 wk
Garden pea
Pisum sativum
18 – 25 Mar
28 Jun
3-4 wk
15 Apr
19 Jul
0 wk
9 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
Fleece
31 Mar – 14 Apr
29 Apr
4-6 wk
12 May
27 May
4 wk after
Lemon balm
Melissa officinalis
4 – 18 Feb
24 May
8-10 wk
15 Apr
19 Jul
0 wk
11 May
9 Jul
4 wk after
Dill
Anethum graveolens
9 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
18 Feb – 4 Mar
7 Jun
6-8 wk
15 Apr
19 Jul
0 wk
9 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
21 Jan – 18 Feb
24 May
8-12 wk
15 Apr
19 Jul
0 wk
11 May
9 Jul
4 wk after
Coriander
Coriandrum sativum
15 Apr
18 Aug
0 wk
28 Apr
8 Aug
2 wk after
Garden sage
Salvia officinalis
4 – 18 Feb
9 May
8-10 wk
15 Apr
4 Jul
0 wk
Common thyme
Thymus vulgaris
4 – 18 Feb
14 May
8-10 wk
15 Apr
9 Jul
0 wk
Oregano
Origanum vulgare
18 Feb – 4 Mar
28 May
6-8 wk
15 Apr
9 Jul
0 wk
11 May
29 Jun
4 wk after
Parsley
Petroselinum crispum
18 Feb – 4 Mar
28 May
6-8 wk
15 Apr
9 Jul
0 wk
9 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
7 Jan – 4 Feb
10 Apr
10-14 wk
15 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
Fleece
14 – 21 Apr
6 May
3-4 wk
12 May
27 May
4 wk after
Cornflower
Centaurea cyanus
15 Apr
19 Jul
0 wk
9 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
3 – 17 Mar
29 Mar
8-10 wk
12 May
24 May
4 wk after
Sweet William
Dianthus barbatus
18 Feb – 4 Mar
6-8 wk
15 Apr
0 wk
20 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
17 – 31 Mar
12 Apr
6-8 wk
12 May
24 May
4 wk after
28 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Mar
25 Apr
6-8 wk
7 May
6 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
16 Mar – 13 Apr
9 May
4-8 wk
11 May
6 Jun
4 wk after
11 May
27 May
4 wk after
Foxglove
Digitalis purpurea
4 – 18 Feb
8-10 wk
15 Apr
0 wk
28 Apr
2 wk after
Busy lizzie
Impatiens walleriana
3 – 31 Mar
17 May
8-12 wk
26 May
12 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
17 – 31 Mar
22 Apr
6-8 wk
12 May
3 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
31 Mar – 14 Apr
4-6 wk
12 May
4 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Feb
24 Apr
8-10 wk
15 Apr
19 Jun
0 wk
Love in a mist
Nigella damascena
15 Apr
4 Jul
0 wk
9 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
17 – 31 Mar
2 Apr
6-8 wk
12 May
14 May
4 wk after
28 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
21 Jan – 18 Feb
24 Apr
8-12 wk
15 Apr
19 Jun
0 wk
Cardoon
Cynara cardunculus
17 Feb – 17 Mar
25 Mar
8-12 wk
12 May
20 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
17 Feb – 17 Mar
22 Mar
8-12 wk
12 May
17 May
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
17 – 31 Mar
5 Apr
6-8 wk
12 May
17 May
4 wk after
Corn poppy
Papaver rhoeas
15 Apr
19 Jul
0 wk
9 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
21 Jan – 18 Feb
14 May
8-12 wk
15 Apr
9 Jul
0 wk
20 Apr
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
17 – 31 Mar
8 Apr
8-10 wk
26 May
3 Jun
6 wk after
Sweet pea
Lathyrus odoratus
18 Feb – 11 Mar
4 Jun
5-8 wk
15 Apr
9 Jul
0 wk
Stock
Matthiola incana
18 Feb – 4 Mar
7 Jun
6-8 wk
15 Apr
19 Jul
0 wk
28 Apr
9 Jul
2 wk after
Wormwood
Artemisia absinthium
18 Feb – 4 Mar
8 May
6-8 wk
15 Apr
19 Jun
0 wk
28 Apr
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
31 Mar – 14 Apr
14 Apr
4-6 wk
12 May
12 May
4 wk after
Garden pansy
Viola × wittrockiana
4 – 18 Feb
24 May
8-10 wk
15 Apr
19 Jul
0 wk
20 Apr
9 Jul
1 wk after
Petunia
Petunia
17 Feb – 17 Mar
29 Mar
8-12 wk
12 May
24 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Feb – 4 Mar
8 May
6-8 wk
15 Apr
19 Jun
0 wk
26 May
9 Jun
6 wk after
Common zinnia
Zinnia elegans
31 Mar – 14 Apr
29 Apr
4-6 wk
12 May
27 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
7 – 21 Apr
6 May
3-5 wk
12 May
27 May
4 wk after
Garden cosmos
Cosmos bipinnatus
31 Mar – 14 Apr
9 May
4-6 wk
12 May
6 Jun
4 wk after
26 May
27 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
3 – 31 Mar
21 Apr
8-12 wk
26 May
16 Jun
6 wk after
Bee balm
Monarda didyma
21 Jan – 18 Feb
24 Apr
8-12 wk
15 Apr
19 Jun
0 wk
11 May
9 Jun
4 wk after
Yarrow
Achillea millefolium
18 Feb – 4 Mar
8 Apr
6-8 wk
15 Apr
20 May
0 wk
28 Apr
10 May
2 wk after
Safflower
Carthamus tinctorius
15 Apr
19 Jun
0 wk
9 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
18 Feb – 4 Mar
28 May
6-8 wk
15 Apr
9 Jul
0 wk
28 Feb
29 Jun
7 wk before
Bishop's flower
Ammi majus
4 – 18 Mar
11 Jun
4-6 wk
15 Apr
9 Jul
0 wk
28 Apr
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
17 Feb – 3 Mar
8 Mar
10-12 wk
12 May
17 May
4 wk after
Sunflower
Helianthus annuus
14 – 21 Apr
18 Jun
3-4 wk
12 May
9 Jul
4 wk after
11 May
29 Jun
4 wk after
China aster
Callistephus chinensis
17 – 31 Mar
7 Jun
6-8 wk
12 May
19 Jul
4 wk after
26 May
9 Jul
6 wk after
Annual phlox
Phlox drummondii
8 – 22 Mar
22 Apr
6-8 wk
3 May
3 Jun
3 wk after
26 May
6 wk after
Hollyhock
Alcea rosea
18 Feb – 4 Mar
6-8 wk
15 Apr
0 wk
28 Apr
2 wk after
Alpine delphinium
Delphinium elatum
21 Jan – 18 Feb
24 Apr
8-12 wk
15 Apr
19 Jun
0 wk
11 May
9 Jun
4 wk after
African marigold
Tagetes erecta
17 – 31 Mar
22 Apr
6-8 wk
12 May
3 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
18 Feb – 4 Mar
28 May
6-8 wk
15 Apr
9 Jul
0 wk
26 May
29 Jun
6 wk after
Wood sage
Salvia nemorosa
4 – 18 Feb
14 Apr
8-10 wk
15 Apr
9 Jun
0 wk
11 May
30 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
3 – 31 Mar
15 Apr
6-10 wk
12 May
27 May
4 wk after
California goldenpoppy
Eschscholzia californica
15 Apr
19 Jul
0 wk
9 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
3 – 17 Mar
10 May
8-10 wk
12 May
5 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
18 Feb – 4 Mar
8 May
6-8 wk
15 Apr
19 Jun
0 wk
28 Apr
9 Jun
2 wk after