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Rel. frost
Last spring frost (0°C) 6 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 177 days 6 Apr – 30 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)
16 Feb – 2 Mar
22 Jun
5-7 wk
6 Apr
27 Jul
0 wk
31 Mar
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
23 Feb – 9 Mar
4 Jul
4-6 wk
6 Apr
1 Aug
0 wk
31 Mar
22 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
5 Feb – 5 Mar
16 Feb
8-12 wk
30 Apr
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
16 Feb – 2 Mar
17 Jun
5-7 wk
6 Apr
22 Jul
0 wk
24 Mar
12 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
16 – 23 Apr
3-4 wk
14 May
5 wk after
Florence Fennel
Foeniculum vulgare
21 – 28 Apr
31 May
4-5 wk
26 May
28 Jun
7 wk after
17 May
18 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
8 – 15 May
3-4 wk
5 Jun
9 wk after
Onion
Allium cepa (Cepa-gruppen)
12 Jan – 9 Feb
3 Apr
8-12 wk
6 Apr
29 May
0 wk
19 Apr
19 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
31 Mar
18 Jun
1 wk before
31 Mar
8 Jun
1 wk before
Maize
Zea mays
Fleece
2 – 9 Apr
2 Apr
3-4 wk
30 Apr
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
11 – 18 Mar
9 Jul
3-4 wk
8 Apr
30 Jul
0 wk
19 Apr
20 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
6 Apr
12 Jul
0 wk
24 Mar
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
16 Feb – 2 Mar
17 Jun
5-7 wk
6 Apr
22 Jul
0 wk
24 Mar
12 Jul
2 wk before
Potato
Solanum tuberosum
28 Feb – 14 Mar
2 Jun
4-6 wk
11 Apr
30 Jun
1 wk after
11 Apr
20 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
16 Feb – 2 Mar
27 Jun
5-7 wk
6 Apr
1 Aug
0 wk
31 Mar
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
16 – 23 Apr
28 May
3-4 wk
14 May
18 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
11 – 18 Mar
15 Jun
3-4 wk
8 Apr
6 Jul
0 wk
19 Apr
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Feb – 9 Mar
29 Jun
4-6 wk
6 Apr
27 Jul
0 wk
Lettuce
Lactuca sativa
9 – 16 Mar
16 Jul
3-4 wk
6 Apr
6 Aug
0 wk
31 Mar
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
23 Feb – 9 Mar
29 Jun
4-6 wk
6 Apr
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Feb – 10 Mar
8 Jun
2-4 wk
24 Mar
22 Jun
2 wk before
24 Mar
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
31 Mar
18 Jun
1 wk before
31 Mar
8 Jun
1 wk before
Spinach
Spinacia oleracea
9 – 16 Mar
31 Jul
3-4 wk
6 Apr
21 Aug
0 wk
17 Mar
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
8 – 22 May
4-6 wk
19 Jun
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
5 – 19 Mar
12 Mar
6-8 wk
30 Apr
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
16 – 30 Apr
19 Apr
2-4 wk
14 May
5 wk after
17 May
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Feb – 9 Mar
29 Jun
4-6 wk
6 Apr
27 Jul
0 wk
Garden pea
Pisum sativum
9 – 16 Mar
1 Jul
3-4 wk
6 Apr
22 Jul
0 wk
31 Mar
12 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
2 – 16 Apr
6 May
4-6 wk
14 May
3 Jun
5 wk after
Lemon balm
Melissa officinalis
26 Jan – 9 Feb
27 May
8-10 wk
6 Apr
22 Jul
0 wk
2 May
12 Jul
4 wk after
Dill
Anethum graveolens
31 Mar
30 Jul
1 wk before
Wild chives
Allium schoenoprasum
9 – 23 Feb
10 Jun
6-8 wk
6 Apr
22 Jul
0 wk
31 Mar
12 Jul
1 wk before
Spearmint
Mentha spicata
12 Jan – 9 Feb
27 May
8-12 wk
6 Apr
22 Jul
0 wk
2 May
12 Jul
4 wk after
Coriander
Coriandrum sativum
6 Apr
19 Aug
0 wk
19 Apr
9 Aug
2 wk after
Garden sage
Salvia officinalis
28 Jan – 11 Feb
12 May
8-10 wk
8 Apr
7 Jul
0 wk
Common thyme
Thymus vulgaris
26 Jan – 9 Feb
17 May
8-10 wk
6 Apr
12 Jul
0 wk
Oregano
Origanum vulgare
9 – 23 Feb
31 May
6-8 wk
6 Apr
12 Jul
0 wk
2 May
2 Jul
4 wk after
Parsley
Petroselinum crispum
9 – 23 Feb
31 May
6-8 wk
6 Apr
12 Jul
0 wk
31 Mar
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
31 Dec – 28 Jan
31 Mar
10-14 wk
8 Apr
9 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
16 – 23 Apr
13 May
3-4 wk
14 May
3 Jun
5 wk after
Cornflower
Centaurea cyanus
6 Apr
22 Jul
0 wk
31 Mar
12 Jul
1 wk before
Statice
Limonium sinuatum
5 – 19 Mar
2 Apr
8-10 wk
14 May
28 May
5 wk after
Sweet William
Dianthus barbatus
9 – 23 Feb
6-8 wk
6 Apr
0 wk
11 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
19 Mar – 2 Apr
16 Apr
6-8 wk
14 May
28 May
5 wk after
19 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Mar
19 Apr
6-8 wk
7 May
31 May
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
7 Mar – 4 Apr
3 May
4-8 wk
2 May
31 May
4 wk after
2 May
21 May
4 wk after
Foxglove
Digitalis purpurea
26 Jan – 9 Feb
8-10 wk
6 Apr
0 wk
19 Apr
2 wk after
Busy lizzie
Impatiens walleriana
3 – 31 Mar
24 May
8-12 wk
26 May
19 Jul
7 wk after
Creeping zinnia
Sanvitalia procumbens
19 Mar – 2 Apr
26 Apr
6-8 wk
14 May
7 Jun
5 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
2 – 16 Apr
6 Apr
4-6 wk
14 May
5 wk after
Chinese lantern
Physalis alkekengi
28 Jan – 11 Feb
25 Apr
8-10 wk
8 Apr
20 Jun
0 wk
Love in a mist
Nigella damascena
6 Apr
7 Jul
0 wk
31 Mar
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
19 Mar – 2 Apr
6 Apr
6-8 wk
14 May
18 May
5 wk after
19 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
14 Jan – 11 Feb
25 Apr
8-12 wk
8 Apr
20 Jun
0 wk
Cardoon
Cynara cardunculus
19 Feb – 19 Mar
26 Mar
8-12 wk
14 May
21 May
5 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
19 Feb – 19 Mar
29 Mar
8-12 wk
14 May
24 May
5 wk after
Globe amaranth
Gomphrena globosa
Fleece
19 Mar – 2 Apr
12 Apr
6-8 wk
14 May
24 May
5 wk after
Corn poppy
Papaver rhoeas
6 Apr
22 Jul
0 wk
31 Mar
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
12 Jan – 9 Feb
17 May
8-12 wk
6 Apr
12 Jul
0 wk
11 Apr
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
17 – 31 Mar
12 Apr
8-10 wk
26 May
7 Jun
7 wk after
Sweet pea
Lathyrus odoratus
9 Feb – 2 Mar
7 Jun
5-8 wk
6 Apr
12 Jul
0 wk
Stock
Matthiola incana
9 – 23 Feb
10 Jun
6-8 wk
6 Apr
22 Jul
0 wk
19 Apr
12 Jul
2 wk after
Wormwood
Artemisia absinthium
9 – 23 Feb
11 May
6-8 wk
6 Apr
22 Jun
0 wk
19 Apr
12 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
2 – 16 Apr
21 Apr
4-6 wk
14 May
19 May
5 wk after
Garden pansy
Viola × wittrockiana
26 Jan – 9 Feb
27 May
8-10 wk
6 Apr
22 Jul
0 wk
11 Apr
12 Jul
1 wk after
Petunia
Petunia
19 Feb – 19 Mar
2 Apr
8-12 wk
14 May
28 May
5 wk after
Sweet Scabious
Scabiosa atropurpurea
11 – 25 Feb
9 May
6-8 wk
8 Apr
20 Jun
0 wk
17 May
10 Jun
6 wk after
Common zinnia
Zinnia elegans
2 – 16 Apr
6 May
4-6 wk
14 May
3 Jun
5 wk after
Common morning glory
Ipomoea purpurea
Fleece
9 – 23 Apr
13 May
3-5 wk
14 May
3 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
2 – 16 Apr
3 May
4-6 wk
14 May
31 May
5 wk after
17 May
21 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
3 – 31 Mar
28 Apr
8-12 wk
26 May
23 Jun
7 wk after
Bee balm
Monarda didyma
12 Jan – 9 Feb
27 Apr
8-12 wk
6 Apr
22 Jun
0 wk
2 May
12 Jun
4 wk after
Yarrow
Achillea millefolium
9 – 23 Feb
11 Apr
6-8 wk
6 Apr
23 May
0 wk
19 Apr
13 May
2 wk after
Safflower
Carthamus tinctorius
6 Apr
22 Jun
0 wk
31 Mar
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
9 – 23 Feb
31 May
6-8 wk
6 Apr
12 Jul
0 wk
19 Feb
2 Jul
7 wk before
Bishop's flower
Ammi majus
23 Feb – 9 Mar
14 Jun
4-6 wk
6 Apr
12 Jul
0 wk
19 Apr
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
19 Feb – 5 Mar
2 Mar
10-12 wk
14 May
5 wk after
Sunflower
Helianthus annuus
16 – 23 Apr
8 Jun
3-4 wk
14 May
29 Jun
5 wk after
2 May
19 Jun
4 wk after
China aster
Callistephus chinensis
19 Mar – 2 Apr
28 May
6-8 wk
14 May
9 Jul
5 wk after
17 May
29 Jun
6 wk after
Annual phlox
Phlox drummondii
5 – 19 Mar
26 Apr
6-8 wk
30 Apr
7 Jun
3 wk after
17 May
28 May
6 wk after
Hollyhock
Alcea rosea
9 – 23 Feb
6-8 wk
6 Apr
0 wk
19 Apr
2 wk after
Alpine delphinium
Delphinium elatum
12 Jan – 9 Feb
27 Apr
8-12 wk
6 Apr
22 Jun
0 wk
2 May
12 Jun
4 wk after
African marigold
Tagetes erecta
19 Mar – 2 Apr
26 Apr
6-8 wk
14 May
7 Jun
5 wk after
Black-eyed Susan
Rudbeckia hirta
11 – 25 Feb
18 May
6-8 wk
8 Apr
29 Jun
0 wk
17 May
19 Jun
6 wk after
Wood sage
Salvia nemorosa
26 Jan – 9 Feb
17 Apr
8-10 wk
6 Apr
12 Jun
0 wk
2 May
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
5 Mar – 2 Apr
22 Apr
6-10 wk
14 May
3 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
6 Apr
22 Jul
0 wk
31 Mar
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
5 – 19 Mar
3 May
8-10 wk
14 May
28 Jun
5 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Feb
11 May
6-8 wk
6 Apr
22 Jun
0 wk
19 Apr
12 Jun
2 wk after