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Rel. frost
Last spring frost (0°C) 27 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 150 days 27 Apr – 24 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)
9 – 23 Mar
15 Jun
5-7 wk
27 Apr
20 Jul
0 wk
1 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
16 – 30 Mar
27 Jun
4-6 wk
27 Apr
25 Jul
0 wk
1 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
17 Feb – 17 Mar
8-12 wk
12 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
9 – 23 Mar
10 Jun
5-7 wk
27 Apr
15 Jul
0 wk
27 Apr
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
14 – 21 Apr
8 May
3-4 wk
12 May
29 May
2 wk after
Florence Fennel
Foeniculum vulgare
5 – 12 May
30 May
4-5 wk
9 Jun
27 Jun
6 wk after
15 Jun
17 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
17 – 24 May
3-4 wk
14 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
2 Feb – 2 Mar
24 Mar
8-12 wk
27 Apr
19 May
0 wk
18 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
1 May
8 Jun
1 wk after
1 May
29 May
1 wk after
Maize
Zea mays
Greenhouse
31 Mar – 7 Apr
28 Apr
3-4 wk
28 Apr
19 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
7 – 14 Apr
4 Jul
3-4 wk
5 May
25 Jul
1 wk after
18 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
27 Apr
5 Jul
0 wk
27 Apr
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
9 – 23 Mar
10 Jun
5-7 wk
27 Apr
15 Jul
0 wk
27 Apr
5 Jul
0 wk
Potato
Solanum tuberosum
1 – 15 Apr
20 May
4-6 wk
13 May
17 Jun
2 wk after
13 May
7 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Mar
20 Jun
5-7 wk
27 Apr
25 Jul
0 wk
1 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
26 Apr – 3 May
13 May
3-4 wk
24 May
3 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
7 – 14 Apr
7 Jun
3-4 wk
5 May
28 Jun
1 wk after
18 May
18 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
16 – 30 Mar
22 Jun
4-6 wk
27 Apr
20 Jul
0 wk
Lettuce
Lactuca sativa
30 Mar – 6 Apr
9 Jul
3-4 wk
27 Apr
30 Jul
0 wk
1 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
16 – 30 Mar
22 Jun
4-6 wk
27 Apr
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Mar – 13 Apr
31 May
2-4 wk
27 Apr
14 Jun
0 wk
27 Apr
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
1 May
8 Jun
1 wk after
1 May
29 May
1 wk after
Spinach
Spinacia oleracea
30 Mar – 6 Apr
24 Jul
3-4 wk
27 Apr
14 Aug
0 wk
23 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
29 May – 12 Jun
4-6 wk
10 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
3 – 17 Mar
7 Apr
6-8 wk
28 Apr
19 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
14 – 28 Apr
15 May
2-4 wk
12 May
29 May
2 wk after
1 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
16 – 30 Mar
22 Jun
4-6 wk
27 Apr
20 Jul
0 wk
Garden pea
Pisum sativum
30 Mar – 6 Apr
24 Jun
3-4 wk
27 Apr
15 Jul
0 wk
1 May
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
12 – 26 Apr
21 Apr
4-6 wk
24 May
4 wk after
Lemon balm
Melissa officinalis
16 Feb – 2 Mar
20 May
8-10 wk
27 Apr
15 Jul
0 wk
1 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
1 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
2 – 16 Mar
3 Jun
6-8 wk
27 Apr
15 Jul
0 wk
1 May
5 Jul
1 wk after
Spearmint
Mentha spicata
2 Feb – 2 Mar
20 May
8-12 wk
27 Apr
15 Jul
0 wk
1 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
27 Apr
14 Aug
0 wk
18 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
24 Feb – 10 Mar
5 May
8-10 wk
5 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
16 Feb – 2 Mar
10 May
8-10 wk
27 Apr
5 Jul
0 wk
Oregano
Origanum vulgare
2 – 16 Mar
24 May
6-8 wk
27 Apr
5 Jul
0 wk
1 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
2 – 16 Mar
24 May
6-8 wk
27 Apr
5 Jul
0 wk
1 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
27 Jan – 24 Feb
29 Mar
10-14 wk
5 May
7 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
26 Apr – 3 May
28 Apr
3-4 wk
24 May
4 wk after
Cornflower
Centaurea cyanus
27 Apr
15 Jul
0 wk
1 May
5 Jul
1 wk after
Statice
Limonium sinuatum
15 – 29 Mar
28 Mar
8-10 wk
24 May
4 wk after
Sweet William
Dianthus barbatus
2 – 16 Mar
6-8 wk
27 Apr
0 wk
13 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
29 Mar – 12 Apr
11 Apr
6-8 wk
24 May
4 wk after
10 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
21 Mar – 4 Apr
14 Apr
6-8 wk
16 May
26 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
6 Apr – 4 May
28 Apr
4-8 wk
1 Jun
5 wk after
1 Jun
5 wk after
Foxglove
Digitalis purpurea
16 Feb – 2 Mar
8-10 wk
27 Apr
0 wk
18 May
3 wk after
Busy lizzie
Impatiens walleriana
17 Mar – 14 Apr
9 May
8-12 wk
9 Jun
4 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
29 Mar – 12 Apr
21 Apr
6-8 wk
24 May
2 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
12 – 26 Apr
4-6 wk
24 May
4 wk after
Chinese lantern
Physalis alkekengi
24 Feb – 10 Mar
20 Apr
8-10 wk
5 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
27 Apr
30 Jun
0 wk
1 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
17 – 31 Mar
20 Apr
6-8 wk
12 May
1 Jun
2 wk after
25 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
10 Feb – 10 Mar
20 Apr
8-12 wk
5 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
1 – 29 Mar
21 Mar
8-12 wk
24 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
17 Feb – 17 Mar
31 Mar
8-12 wk
12 May
26 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
17 – 31 Mar
14 Apr
6-8 wk
12 May
26 May
2 wk after
Corn poppy
Papaver rhoeas
27 Apr
15 Jul
0 wk
1 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
2 Feb – 2 Mar
10 May
8-12 wk
27 Apr
5 Jul
0 wk
13 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
31 Mar – 14 Apr
7 Apr
8-10 wk
9 Jun
6 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Mar
31 May
5-8 wk
27 Apr
5 Jul
0 wk
Stock
Matthiola incana
2 – 16 Mar
3 Jun
6-8 wk
27 Apr
15 Jul
0 wk
18 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
2 – 16 Mar
4 May
6-8 wk
27 Apr
15 Jun
0 wk
18 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
31 Mar – 14 Apr
23 Apr
4-6 wk
12 May
21 May
2 wk after
Garden pansy
Viola × wittrockiana
16 Feb – 2 Mar
20 May
8-10 wk
27 Apr
15 Jul
0 wk
13 May
5 Jul
2 wk after
Petunia
Petunia
1 – 29 Mar
28 Mar
8-12 wk
24 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
10 – 24 Mar
4 May
6-8 wk
5 May
15 Jun
1 wk after
15 Jun
7 wk after
Common zinnia
Zinnia elegans
12 – 26 Apr
21 Apr
4-6 wk
24 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
19 Apr – 3 May
28 Apr
3-5 wk
24 May
4 wk after
Garden cosmos
Cosmos bipinnatus
12 – 26 Apr
28 Apr
4-6 wk
24 May
26 May
4 wk after
15 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
17 Mar – 14 Apr
13 Apr
8-12 wk
9 Jun
6 wk after
Bee balm
Monarda didyma
2 Feb – 2 Mar
20 Apr
8-12 wk
27 Apr
15 Jun
0 wk
1 Jun
5 Jun
5 wk after
Yarrow
Achillea millefolium
2 – 16 Mar
4 Apr
6-8 wk
27 Apr
16 May
0 wk
18 May
3 wk after
Safflower
Carthamus tinctorius
27 Apr
15 Jun
0 wk
1 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
2 – 16 Mar
24 May
6-8 wk
27 Apr
5 Jul
0 wk
9 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
16 – 30 Mar
7 Jun
4-6 wk
27 Apr
5 Jul
0 wk
18 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
17 Feb – 3 Mar
18 Mar
10-12 wk
12 May
27 May
2 wk after
Sunflower
Helianthus annuus
26 Apr – 3 May
6 Jun
3-4 wk
24 May
27 Jun
4 wk after
1 Jun
17 Jun
5 wk after
China aster
Callistephus chinensis
29 Mar – 12 Apr
26 May
6-8 wk
24 May
7 Jul
4 wk after
15 Jun
27 Jun
7 wk after
Annual phlox
Phlox drummondii
17 – 31 Mar
21 Apr
6-8 wk
12 May
2 Jun
2 wk after
15 Jun
7 wk after
Hollyhock
Alcea rosea
2 – 16 Mar
6-8 wk
27 Apr
0 wk
18 May
3 wk after
Alpine delphinium
Delphinium elatum
2 Feb – 2 Mar
20 Apr
8-12 wk
27 Apr
15 Jun
0 wk
1 Jun
5 Jun
5 wk after
African marigold
Tagetes erecta
29 Mar – 12 Apr
21 Apr
6-8 wk
24 May
2 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
10 – 24 Mar
16 May
6-8 wk
5 May
27 Jun
1 wk after
15 Jun
17 Jun
7 wk after
Wood sage
Salvia nemorosa
16 Feb – 2 Mar
10 Apr
8-10 wk
27 Apr
5 Jun
0 wk
1 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
15 Mar – 12 Apr
7 Apr
6-10 wk
24 May
4 wk after
California goldenpoppy
Eschscholzia californica
27 Apr
15 Jul
0 wk
1 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
15 – 29 Mar
2 May
8-10 wk
24 May
27 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Mar
4 May
6-8 wk
27 Apr
15 Jun
0 wk
18 May
5 Jun
3 wk after