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Rel. frost
Last spring frost (0°C) 22 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 170 days 22 Apr – 9 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)
4 – 18 Mar
16 Jun
5-7 wk
22 Apr
21 Jul
0 wk
26 Apr
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Mar
28 Jun
4-6 wk
22 Apr
26 Jul
0 wk
26 Apr
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
12 Feb – 12 Mar
8-12 wk
7 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Mar
11 Jun
5-7 wk
22 Apr
16 Jul
0 wk
22 Apr
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
9 – 16 Apr
26 May
3-4 wk
7 May
16 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
30 Apr – 7 May
8 Jun
4-5 wk
4 Jun
6 Jul
6 wk after
10 Jun
26 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
12 – 19 May
3-4 wk
9 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
28 Jan – 25 Feb
31 Mar
8-12 wk
22 Apr
26 May
0 wk
13 May
16 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
26 Apr
15 Jun
1 wk after
26 Apr
5 Jun
1 wk after
Maize
Zea mays
Greenhouse
26 Mar – 2 Apr
16 May
3-4 wk
23 Apr
6 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 Apr
5 Jul
3-4 wk
30 Apr
26 Jul
1 wk after
13 May
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 Apr
6 Jul
0 wk
22 Apr
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Mar
11 Jun
5-7 wk
22 Apr
16 Jul
0 wk
22 Apr
6 Jul
0 wk
Potato
Solanum tuberosum
27 Mar – 10 Apr
28 May
4-6 wk
8 May
25 Jun
2 wk after
8 May
15 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Mar
21 Jun
5-7 wk
22 Apr
26 Jul
0 wk
26 Apr
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
21 – 28 Apr
31 May
3-4 wk
19 May
21 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 Apr
9 Jun
3-4 wk
30 Apr
30 Jun
1 wk after
13 May
20 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Mar
23 Jun
4-6 wk
22 Apr
21 Jul
0 wk
Lettuce
Lactuca sativa
25 Mar – 1 Apr
10 Jul
3-4 wk
22 Apr
31 Jul
0 wk
26 Apr
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Mar
23 Jun
4-6 wk
22 Apr
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Mar – 8 Apr
2 Jun
2-4 wk
22 Apr
16 Jun
0 wk
22 Apr
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
26 Apr
15 Jun
1 wk after
26 Apr
5 Jun
1 wk after
Spinach
Spinacia oleracea
25 Mar – 1 Apr
25 Jul
3-4 wk
22 Apr
15 Aug
0 wk
18 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
24 May – 7 Jun
4-6 wk
5 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
26 Feb – 12 Mar
25 Apr
6-8 wk
23 Apr
6 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
9 – 23 Apr
2 Jun
2-4 wk
7 May
16 Jun
2 wk after
27 May
6 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Mar
23 Jun
4-6 wk
22 Apr
21 Jul
0 wk
Garden pea
Pisum sativum
25 Mar – 1 Apr
25 Jun
3-4 wk
22 Apr
16 Jul
0 wk
26 Apr
6 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
7 – 21 Apr
9 May
4-6 wk
19 May
6 Jun
4 wk after
Lemon balm
Melissa officinalis
11 – 25 Feb
21 May
8-10 wk
22 Apr
16 Jul
0 wk
27 May
6 Jul
5 wk after
Dill
Anethum graveolens
26 Apr
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
25 Feb – 11 Mar
4 Jun
6-8 wk
22 Apr
16 Jul
0 wk
26 Apr
6 Jul
1 wk after
Spearmint
Mentha spicata
28 Jan – 25 Feb
21 May
8-12 wk
22 Apr
16 Jul
0 wk
27 May
6 Jul
5 wk after
Coriander
Coriandrum sativum
22 Apr
15 Aug
0 wk
13 May
5 Aug
3 wk after
Garden sage
Salvia officinalis
19 Feb – 5 Mar
6 May
8-10 wk
30 Apr
1 Jul
1 wk after
Common thyme
Thymus vulgaris
11 – 25 Feb
11 May
8-10 wk
22 Apr
6 Jul
0 wk
Oregano
Origanum vulgare
25 Feb – 11 Mar
25 May
6-8 wk
22 Apr
6 Jul
0 wk
27 May
26 Jun
5 wk after
Parsley
Petroselinum crispum
25 Feb – 11 Mar
25 May
6-8 wk
22 Apr
6 Jul
0 wk
26 Apr
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
22 Jan – 19 Feb
7 Apr
10-14 wk
30 Apr
16 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
Fleece
21 – 28 Apr
16 May
3-4 wk
19 May
6 Jun
4 wk after
Cornflower
Centaurea cyanus
22 Apr
16 Jul
0 wk
26 Apr
6 Jul
1 wk after
Statice
Limonium sinuatum
10 – 24 Mar
12 Apr
8-10 wk
19 May
7 Jun
4 wk after
Sweet William
Dianthus barbatus
25 Feb – 11 Mar
6-8 wk
22 Apr
0 wk
8 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
24 Mar – 7 Apr
26 Apr
6-8 wk
19 May
7 Jun
4 wk after
5 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Mar
5 May
6-8 wk
11 May
16 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
1 – 29 Apr
19 May
4-8 wk
27 May
16 Jun
5 wk after
27 May
6 Jun
5 wk after
Foxglove
Digitalis purpurea
11 – 25 Feb
8-10 wk
22 Apr
0 wk
13 May
3 wk after
Busy lizzie
Impatiens walleriana
12 Mar – 9 Apr
27 May
8-12 wk
4 Jun
22 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
24 Mar – 7 Apr
6 May
6-8 wk
19 May
17 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
7 – 21 Apr
9 Apr
4-6 wk
19 May
4 wk after
Chinese lantern
Physalis alkekengi
19 Feb – 5 Mar
21 Apr
8-10 wk
30 Apr
16 Jun
1 wk after
Love in a mist
Nigella damascena
22 Apr
1 Jul
0 wk
26 Apr
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
24 Mar – 7 Apr
16 Apr
6-8 wk
19 May
28 May
4 wk after
5 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
5 Feb – 5 Mar
21 Apr
8-12 wk
30 Apr
16 Jun
1 wk after
Cardoon
Cynara cardunculus
24 Feb – 24 Mar
22 Mar
8-12 wk
19 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
24 Feb – 24 Mar
1 Apr
8-12 wk
19 May
27 May
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
24 Mar – 7 Apr
15 Apr
6-8 wk
19 May
27 May
4 wk after
Corn poppy
Papaver rhoeas
22 Apr
16 Jul
0 wk
26 Apr
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
28 Jan – 25 Feb
11 May
8-12 wk
22 Apr
6 Jul
0 wk
8 May
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
26 Mar – 9 Apr
22 Apr
8-10 wk
4 Jun
17 Jun
6 wk after
Sweet pea
Lathyrus odoratus
25 Feb – 18 Mar
1 Jun
5-8 wk
22 Apr
6 Jul
0 wk
Stock
Matthiola incana
25 Feb – 11 Mar
4 Jun
6-8 wk
22 Apr
16 Jul
0 wk
13 May
6 Jul
3 wk after
Wormwood
Artemisia absinthium
25 Feb – 11 Mar
5 May
6-8 wk
22 Apr
16 Jun
0 wk
13 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
7 – 21 Apr
24 Apr
4-6 wk
19 May
22 May
4 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Feb
21 May
8-10 wk
22 Apr
16 Jul
0 wk
8 May
6 Jul
2 wk after
Petunia
Petunia
24 Feb – 24 Mar
12 Apr
8-12 wk
19 May
7 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
5 – 19 Mar
5 May
6-8 wk
30 Apr
16 Jun
1 wk after
10 Jun
7 wk after
Common zinnia
Zinnia elegans
7 – 21 Apr
9 May
4-6 wk
19 May
6 Jun
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
14 – 28 Apr
16 May
3-5 wk
19 May
6 Jun
4 wk after
Garden cosmos
Cosmos bipinnatus
7 – 21 Apr
19 May
4-6 wk
19 May
16 Jun
4 wk after
10 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
12 Mar – 9 Apr
1 May
8-12 wk
4 Jun
26 Jun
6 wk after
Bee balm
Monarda didyma
28 Jan – 25 Feb
21 Apr
8-12 wk
22 Apr
16 Jun
0 wk
27 May
6 Jun
5 wk after
Yarrow
Achillea millefolium
25 Feb – 11 Mar
5 Apr
6-8 wk
22 Apr
17 May
0 wk
13 May
3 wk after
Safflower
Carthamus tinctorius
22 Apr
16 Jun
0 wk
26 Apr
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
25 Feb – 11 Mar
25 May
6-8 wk
22 Apr
6 Jul
0 wk
4 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
11 – 25 Mar
8 Jun
4-6 wk
22 Apr
6 Jul
0 wk
13 May
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
24 Feb – 10 Mar
18 Mar
10-12 wk
19 May
27 May
4 wk after
Sunflower
Helianthus annuus
21 – 28 Apr
15 Jun
3-4 wk
19 May
6 Jul
4 wk after
27 May
26 Jun
5 wk after
China aster
Callistephus chinensis
24 Mar – 7 Apr
4 Jun
6-8 wk
19 May
16 Jul
4 wk after
10 Jun
6 Jul
7 wk after
Annual phlox
Phlox drummondii
12 – 26 Mar
6 May
6-8 wk
7 May
17 Jun
2 wk after
10 Jun
7 wk after
Hollyhock
Alcea rosea
25 Feb – 11 Mar
6-8 wk
22 Apr
0 wk
13 May
3 wk after
Alpine delphinium
Delphinium elatum
28 Jan – 25 Feb
21 Apr
8-12 wk
22 Apr
16 Jun
0 wk
27 May
6 Jun
5 wk after
African marigold
Tagetes erecta
24 Mar – 7 Apr
6 May
6-8 wk
19 May
17 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
5 – 19 Mar
25 May
6-8 wk
30 Apr
6 Jul
1 wk after
10 Jun
26 Jun
7 wk after
Wood sage
Salvia nemorosa
11 – 25 Feb
11 Apr
8-10 wk
22 Apr
6 Jun
0 wk
27 May
27 May
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
10 Mar – 7 Apr
25 Apr
6-10 wk
19 May
6 Jun
4 wk after
California goldenpoppy
Eschscholzia californica
22 Apr
16 Jul
0 wk
26 Apr
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
10 – 24 Mar
11 May
8-10 wk
19 May
6 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
25 Feb – 11 Mar
5 May
6-8 wk
22 Apr
16 Jun
0 wk
13 May
6 Jun
3 wk after