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Rel. frost
Last spring frost (0°C) 19 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 170 days 19 Apr – 6 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)
1 – 15 Mar
11 Jun
5-7 wk
19 Apr
16 Jul
0 wk
20 Apr
6 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Mar
23 Jun
4-6 wk
19 Apr
21 Jul
0 wk
20 Apr
11 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
12 Feb – 12 Mar
8-12 wk
7 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Mar
6 Jun
5-7 wk
19 Apr
11 Jul
0 wk
19 Apr
1 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
9 – 16 Apr
3-4 wk
7 May
3 wk after
Florence Fennel
Foeniculum vulgare
27 Apr – 4 May
3 Jun
4-5 wk
1 Jun
1 Jul
6 wk after
1 Jun
21 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
13 – 20 May
3-4 wk
10 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Jan – 22 Feb
12 Mar
8-12 wk
19 Apr
7 May
0 wk
2 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
20 Apr
27 May
0 wk
20 Apr
17 May
0 wk
Maize
Zea mays
Greenhouse
22 – 29 Mar
3-4 wk
19 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Mar – 2 Apr
30 Jun
3-4 wk
23 Apr
21 Jul
1 wk after
2 May
11 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
19 Apr
1 Jul
0 wk
19 Apr
21 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Mar
6 Jun
5-7 wk
19 Apr
11 Jul
0 wk
19 Apr
1 Jul
0 wk
Potato
Solanum tuberosum
18 Mar – 1 Apr
9 May
4-6 wk
29 Apr
6 Jun
1 wk after
29 Apr
27 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Mar
16 Jun
5-7 wk
19 Apr
21 Jul
0 wk
20 Apr
11 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
9 – 16 Apr
31 May
3-4 wk
7 May
21 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Mar – 2 Apr
3 May
3-4 wk
23 Apr
24 May
1 wk after
2 May
14 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Mar
18 Jun
4-6 wk
19 Apr
16 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Mar
5 Jul
3-4 wk
19 Apr
26 Jul
0 wk
20 Apr
16 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Mar
18 Jun
4-6 wk
19 Apr
16 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Mar – 5 Apr
18 May
2-4 wk
19 Apr
1 Jun
0 wk
19 Apr
22 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
20 Apr
27 May
0 wk
20 Apr
17 May
0 wk
Spinach
Spinacia oleracea
22 – 29 Mar
20 Jul
3-4 wk
19 Apr
10 Aug
0 wk
16 Apr
31 Jul
0 wk
Sweet potato
Ipomoea batatas
14 – 28 May
4-6 wk
25 Jun
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
22 Feb – 8 Mar
23 Feb
6-8 wk
19 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
22 Mar – 5 Apr
2 Jun
2-4 wk
19 Apr
16 Jun
0 wk
2 May
6 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Mar
18 Jun
4-6 wk
19 Apr
16 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Mar
20 Jun
3-4 wk
19 Apr
11 Jul
0 wk
20 Apr
1 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
26 Mar – 9 Apr
9 May
4-6 wk
7 May
6 Jun
3 wk after
Lemon balm
Melissa officinalis
8 – 22 Feb
16 May
8-10 wk
19 Apr
11 Jul
0 wk
14 May
1 Jul
4 wk after
Dill
Anethum graveolens
20 Apr
21 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
22 Feb – 8 Mar
29 May
6-8 wk
19 Apr
10 Jul
0 wk
10 Apr
30 Jun
1 wk before
Spearmint
Mentha spicata
25 Jan – 22 Feb
16 May
8-12 wk
19 Apr
11 Jul
0 wk
14 May
1 Jul
4 wk after
Coriander
Coriandrum sativum
19 Apr
10 Aug
0 wk
2 May
31 Jul
2 wk after
Garden sage
Salvia officinalis
12 – 26 Feb
1 May
8-10 wk
23 Apr
26 Jun
1 wk after
Common thyme
Thymus vulgaris
8 – 22 Feb
6 May
8-10 wk
19 Apr
1 Jul
0 wk
Oregano
Origanum vulgare
22 Feb – 8 Mar
20 May
6-8 wk
19 Apr
1 Jul
0 wk
14 May
21 Jun
4 wk after
Parsley
Petroselinum crispum
22 Feb – 8 Mar
20 May
6-8 wk
19 Apr
1 Jul
0 wk
20 Apr
21 Jun
0 wk
Rosemary
Salvia rosmarinus
15 Jan – 12 Feb
2 Apr
10-14 wk
23 Apr
11 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
Greenhouse
9 – 16 Apr
16 May
3-4 wk
7 May
6 Jun
3 wk after
Cornflower
Centaurea cyanus
19 Apr
11 Jul
0 wk
20 Apr
1 Jul
0 wk
Statice
Limonium sinuatum
Fleece
26 Feb – 12 Mar
18 Apr
8-10 wk
7 May
13 Jun
3 wk after
Sweet William
Dianthus barbatus
22 Feb – 8 Mar
6-8 wk
19 Apr
0 wk
29 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
12 – 26 Mar
2 May
6-8 wk
7 May
13 Jun
3 wk after
8 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
14 – 28 Mar
15 Apr
6-8 wk
9 May
27 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
7 Mar – 4 Apr
21 May
4-8 wk
2 May
18 Jun
2 wk after
2 May
8 Jun
2 wk after
Foxglove
Digitalis purpurea
8 – 22 Feb
8-10 wk
19 Apr
0 wk
2 May
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
16 Feb – 16 Mar
27 May
8-12 wk
11 May
22 Jul
3 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
12 – 26 Mar
12 May
6-8 wk
7 May
23 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
30 Mar – 13 Apr
4-6 wk
11 May
3 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Feb
16 Apr
8-10 wk
23 Apr
11 Jun
1 wk after
Love in a mist
Nigella damascena
19 Apr
26 Jun
0 wk
20 Apr
16 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
12 – 26 Mar
22 Apr
6-8 wk
7 May
3 Jun
3 wk after
8 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
29 Jan – 26 Feb
16 Apr
8-12 wk
23 Apr
11 Jun
1 wk after
Cardoon
Cynara cardunculus
16 Feb – 16 Mar
17 Mar
8-12 wk
11 May
12 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
12 Feb – 12 Mar
1 Apr
8-12 wk
7 May
27 May
3 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
12 – 26 Mar
15 Apr
6-8 wk
7 May
27 May
3 wk after
Corn poppy
Papaver rhoeas
19 Apr
11 Jul
0 wk
20 Apr
1 Jul
0 wk
Snapdragon
Antirrhinum majus
25 Jan – 22 Feb
6 May
8-12 wk
19 Apr
1 Jul
0 wk
29 Apr
21 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
2 – 16 Mar
28 Apr
8-10 wk
11 May
23 Jun
3 wk after
Sweet pea
Lathyrus odoratus
22 Feb – 15 Mar
27 May
5-8 wk
19 Apr
1 Jul
0 wk
Stock
Matthiola incana
22 Feb – 8 Mar
30 May
6-8 wk
19 Apr
11 Jul
0 wk
2 May
1 Jul
2 wk after
Wormwood
Artemisia absinthium
22 Feb – 8 Mar
30 Apr
6-8 wk
19 Apr
11 Jun
0 wk
2 May
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
26 Mar – 9 Apr
24 Apr
4-6 wk
7 May
22 May
3 wk after
Garden pansy
Viola × wittrockiana
8 – 22 Feb
16 May
8-10 wk
19 Apr
11 Jul
0 wk
29 Apr
1 Jul
1 wk after
Petunia
Petunia
Fleece
12 Feb – 12 Mar
18 Apr
8-12 wk
7 May
13 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
26 Feb – 12 Mar
30 Apr
6-8 wk
23 Apr
11 Jun
1 wk after
1 Jun
1 Jun
6 wk after
Common zinnia
Zinnia elegans
Fleece
26 Mar – 9 Apr
9 May
4-6 wk
7 May
6 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
2 – 16 Apr
16 May
3-5 wk
7 May
6 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
30 Mar – 13 Apr
29 Apr
4-6 wk
11 May
27 May
3 wk after
1 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
16 Feb – 16 Mar
1 May
8-12 wk
11 May
26 Jun
3 wk after
Bee balm
Monarda didyma
25 Jan – 22 Feb
16 Apr
8-12 wk
19 Apr
11 Jun
0 wk
14 May
1 Jun
4 wk after
Yarrow
Achillea millefolium
22 Feb – 8 Mar
31 Mar
6-8 wk
19 Apr
12 May
0 wk
2 May
2 May
2 wk after
Safflower
Carthamus tinctorius
19 Apr
11 Jun
0 wk
20 Apr
1 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
22 Feb – 8 Mar
19 May
6-8 wk
19 Apr
30 Jun
0 wk
3 Apr
20 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Mar
3 Jun
4-6 wk
19 Apr
1 Jul
0 wk
2 May
21 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
12 – 26 Feb
20 Mar
10-12 wk
7 May
29 May
3 wk after
Sunflower
Helianthus annuus
13 – 20 Apr
10 Jun
3-4 wk
11 May
1 Jul
3 wk after
14 May
21 Jun
4 wk after
China aster
Callistephus chinensis
16 – 30 Mar
30 May
6-8 wk
11 May
11 Jul
3 wk after
1 Jun
1 Jul
6 wk after
Annual phlox
Phlox drummondii
12 – 26 Mar
3 Apr
6-8 wk
7 May
15 May
3 wk after
1 Jun
6 wk after
Hollyhock
Alcea rosea
22 Feb – 8 Mar
6-8 wk
19 Apr
0 wk
2 May
2 wk after
Alpine delphinium
Delphinium elatum
25 Jan – 22 Feb
16 Apr
8-12 wk
19 Apr
11 Jun
0 wk
14 May
1 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
12 – 26 Mar
12 May
6-8 wk
7 May
23 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
26 Feb – 12 Mar
20 May
6-8 wk
23 Apr
1 Jul
1 wk after
1 Jun
21 Jun
6 wk after
Wood sage
Salvia nemorosa
8 – 22 Feb
6 Apr
8-10 wk
19 Apr
1 Jun
0 wk
14 May
22 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
26 Feb – 26 Mar
25 Apr
6-10 wk
7 May
6 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
19 Apr
11 Jul
0 wk
20 Apr
1 Jul
0 wk
Painted tongue
Salpiglossis sinuata
2 – 16 Mar
6 May
8-10 wk
11 May
1 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
22 Feb – 8 Mar
29 Apr
6-8 wk
19 Apr
10 Jun
0 wk
19 Apr
31 May
0 wk