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Rel. frost
Last spring frost (0°C) 21 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 162 days 21 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)
3 – 17 Mar
15 Jun
5-7 wk
21 Apr
20 Jul
0 wk
25 Apr
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Mar
27 Jun
4-6 wk
21 Apr
25 Jul
0 wk
25 Apr
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
11 Feb – 11 Mar
8-12 wk
6 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Mar
10 Jun
5-7 wk
21 Apr
15 Jul
0 wk
21 Apr
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
8 – 15 Apr
18 May
3-4 wk
6 May
8 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
30 May
4-5 wk
3 Jun
27 Jun
6 wk after
9 Jun
17 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
11 – 18 May
3-4 wk
8 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Jan – 24 Feb
22 Mar
8-12 wk
21 Apr
17 May
0 wk
12 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
25 Apr
6 Jun
1 wk after
25 Apr
27 May
1 wk after
Maize
Zea mays
Greenhouse
25 Mar – 1 Apr
8 May
3-4 wk
22 Apr
29 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
1 – 8 Apr
4 Jul
3-4 wk
29 Apr
25 Jul
1 wk after
12 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 Apr
5 Jul
0 wk
21 Apr
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Mar
10 Jun
5-7 wk
21 Apr
15 Jul
0 wk
21 Apr
5 Jul
0 wk
Potato
Solanum tuberosum
26 Mar – 9 Apr
20 May
4-6 wk
7 May
17 Jun
2 wk after
7 May
7 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Mar
20 Jun
5-7 wk
21 Apr
25 Jul
0 wk
25 Apr
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
20 – 27 Apr
23 May
3-4 wk
18 May
13 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
1 – 8 Apr
4 Jun
3-4 wk
29 Apr
25 Jun
1 wk after
12 May
15 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Mar
22 Jun
4-6 wk
21 Apr
20 Jul
0 wk
Lettuce
Lactuca sativa
24 – 31 Mar
9 Jul
3-4 wk
21 Apr
30 Jul
0 wk
25 Apr
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Mar
22 Jun
4-6 wk
21 Apr
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Mar – 7 Apr
31 May
2-4 wk
21 Apr
14 Jun
0 wk
21 Apr
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
25 Apr
6 Jun
1 wk after
25 Apr
27 May
1 wk after
Spinach
Spinacia oleracea
24 – 31 Mar
24 Jul
3-4 wk
21 Apr
14 Aug
0 wk
17 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
23 May – 6 Jun
4-6 wk
4 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
25 Feb – 11 Mar
17 Apr
6-8 wk
22 Apr
29 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
8 – 22 Apr
25 May
2-4 wk
6 May
8 Jun
2 wk after
26 May
29 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Mar
22 Jun
4-6 wk
21 Apr
20 Jul
0 wk
Garden pea
Pisum sativum
24 – 31 Mar
24 Jun
3-4 wk
21 Apr
15 Jul
0 wk
25 Apr
5 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
6 – 20 Apr
1 May
4-6 wk
18 May
29 May
4 wk after
Lemon balm
Melissa officinalis
10 – 24 Feb
20 May
8-10 wk
21 Apr
15 Jul
0 wk
26 May
5 Jul
5 wk after
Dill
Anethum graveolens
25 Apr
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
24 Feb – 10 Mar
3 Jun
6-8 wk
21 Apr
15 Jul
0 wk
25 Apr
5 Jul
1 wk after
Spearmint
Mentha spicata
27 Jan – 24 Feb
20 May
8-12 wk
21 Apr
15 Jul
0 wk
26 May
5 Jul
5 wk after
Coriander
Coriandrum sativum
21 Apr
14 Aug
0 wk
12 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
18 Feb – 4 Mar
5 May
8-10 wk
29 Apr
30 Jun
1 wk after
Common thyme
Thymus vulgaris
10 – 24 Feb
10 May
8-10 wk
21 Apr
5 Jul
0 wk
Oregano
Origanum vulgare
24 Feb – 10 Mar
24 May
6-8 wk
21 Apr
5 Jul
0 wk
26 May
25 Jun
5 wk after
Parsley
Petroselinum crispum
24 Feb – 10 Mar
24 May
6-8 wk
21 Apr
5 Jul
0 wk
25 Apr
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
21 Jan – 18 Feb
6 Apr
10-14 wk
29 Apr
15 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
20 – 27 Apr
8 May
3-4 wk
18 May
29 May
4 wk after
Cornflower
Centaurea cyanus
21 Apr
15 Jul
0 wk
25 Apr
5 Jul
1 wk after
Statice
Limonium sinuatum
9 – 23 Mar
1 Apr
8-10 wk
18 May
27 May
4 wk after
Sweet William
Dianthus barbatus
24 Feb – 10 Mar
6-8 wk
21 Apr
0 wk
7 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
23 Mar – 6 Apr
15 Apr
6-8 wk
18 May
27 May
4 wk after
4 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
15 – 29 Mar
28 Apr
6-8 wk
10 May
9 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
31 Mar – 28 Apr
12 May
4-8 wk
26 May
9 Jun
5 wk after
26 May
30 May
5 wk after
Foxglove
Digitalis purpurea
10 – 24 Feb
8-10 wk
21 Apr
0 wk
12 May
3 wk after
Busy lizzie
Impatiens walleriana
11 Mar – 8 Apr
19 May
8-12 wk
3 Jun
14 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
23 Mar – 6 Apr
25 Apr
6-8 wk
18 May
6 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
6 – 20 Apr
4-6 wk
18 May
4 wk after
Chinese lantern
Physalis alkekengi
18 Feb – 4 Mar
20 Apr
8-10 wk
29 Apr
15 Jun
1 wk after
Love in a mist
Nigella damascena
21 Apr
30 Jun
0 wk
25 Apr
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
11 – 25 Mar
23 Apr
6-8 wk
6 May
4 Jun
2 wk after
19 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
4 Feb – 4 Mar
20 Apr
8-12 wk
29 Apr
15 Jun
1 wk after
Cardoon
Cynara cardunculus
23 Feb – 23 Mar
21 Mar
8-12 wk
18 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
23 Feb – 23 Mar
24 Mar
8-12 wk
18 May
19 May
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
23 Mar – 6 Apr
7 Apr
6-8 wk
18 May
19 May
4 wk after
Corn poppy
Papaver rhoeas
21 Apr
15 Jul
0 wk
25 Apr
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
27 Jan – 24 Feb
10 May
8-12 wk
21 Apr
5 Jul
0 wk
7 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
25 Mar – 8 Apr
11 Apr
8-10 wk
3 Jun
6 Jun
6 wk after
Sweet pea
Lathyrus odoratus
24 Feb – 17 Mar
31 May
5-8 wk
21 Apr
5 Jul
0 wk
Stock
Matthiola incana
24 Feb – 10 Mar
3 Jun
6-8 wk
21 Apr
15 Jul
0 wk
12 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
24 Feb – 10 Mar
4 May
6-8 wk
21 Apr
15 Jun
0 wk
12 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
25 Mar – 8 Apr
7 May
4-6 wk
6 May
4 Jun
2 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Feb
20 May
8-10 wk
21 Apr
15 Jul
0 wk
7 May
5 Jul
2 wk after
Petunia
Petunia
23 Feb – 23 Mar
1 Apr
8-12 wk
18 May
27 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Mar
4 May
6-8 wk
29 Apr
15 Jun
1 wk after
9 Jun
7 wk after
Common zinnia
Zinnia elegans
6 – 20 Apr
1 May
4-6 wk
18 May
29 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
13 – 27 Apr
8 May
3-5 wk
18 May
29 May
4 wk after
Garden cosmos
Cosmos bipinnatus
6 – 20 Apr
12 May
4-6 wk
18 May
9 Jun
4 wk after
9 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
11 Mar – 8 Apr
23 Apr
8-12 wk
3 Jun
18 Jun
6 wk after
Bee balm
Monarda didyma
27 Jan – 24 Feb
20 Apr
8-12 wk
21 Apr
15 Jun
0 wk
26 May
5 Jun
5 wk after
Yarrow
Achillea millefolium
24 Feb – 10 Mar
4 Apr
6-8 wk
21 Apr
16 May
0 wk
12 May
3 wk after
Safflower
Carthamus tinctorius
21 Apr
15 Jun
0 wk
25 Apr
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
24 Feb – 10 Mar
24 May
6-8 wk
21 Apr
5 Jul
0 wk
3 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
10 – 24 Mar
7 Jun
4-6 wk
21 Apr
5 Jul
0 wk
12 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
23 Feb – 9 Mar
11 Mar
10-12 wk
18 May
20 May
4 wk after
Sunflower
Helianthus annuus
20 – 27 Apr
14 Jun
3-4 wk
18 May
5 Jul
4 wk after
26 May
25 Jun
5 wk after
China aster
Callistephus chinensis
23 Mar – 6 Apr
3 Jun
6-8 wk
18 May
15 Jul
4 wk after
9 Jun
5 Jul
7 wk after
Annual phlox
Phlox drummondii
11 – 25 Mar
25 Apr
6-8 wk
6 May
6 Jun
2 wk after
9 Jun
7 wk after
Hollyhock
Alcea rosea
24 Feb – 10 Mar
6-8 wk
21 Apr
0 wk
12 May
3 wk after
Alpine delphinium
Delphinium elatum
27 Jan – 24 Feb
20 Apr
8-12 wk
21 Apr
15 Jun
0 wk
26 May
5 Jun
5 wk after
African marigold
Tagetes erecta
23 Mar – 6 Apr
25 Apr
6-8 wk
18 May
6 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Mar
24 May
6-8 wk
29 Apr
5 Jul
1 wk after
9 Jun
25 Jun
7 wk after
Wood sage
Salvia nemorosa
10 – 24 Feb
10 Apr
8-10 wk
21 Apr
5 Jun
0 wk
26 May
26 May
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
9 Mar – 6 Apr
17 Apr
6-10 wk
18 May
29 May
4 wk after
California goldenpoppy
Eschscholzia californica
21 Apr
15 Jul
0 wk
25 Apr
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
9 – 23 Mar
2 May
8-10 wk
18 May
27 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
24 Feb – 10 Mar
4 May
6-8 wk
21 Apr
15 Jun
0 wk
12 May
5 Jun
3 wk after