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Rel. frost
Last spring frost (0°C) 8 May Frost 3 of 4 years · 20 years of data
Frost-free season 140 days 8 May – 25 Sep
Probability that frost is over

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