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Method
Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 10 years · 20 years of data
Frost-free season 145 days 22 May – 14 Oct
Probability that frost is over

90% = 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 Apr
12 Jun
5-7 wk
22 May
17 Jul
0 wk
23 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
24 Jun
4-6 wk
22 May
22 Jul
0 wk
23 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
5 Mar – 2 Apr
19 Mar
8-12 wk
28 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
3 – 17 Apr
7 Jun
5-7 wk
22 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
7 – 14 May
13 May
3-4 wk
4 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
19 – 26 May
4 Jun
4-5 wk
23 Jun
2 Jul
5 wk after
4 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
2 – 9 Jun
3-4 wk
30 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
28 Mar
8-12 wk
22 May
23 May
0 wk
4 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
12 Jun
0 wk
23 May
2 Jun
0 wk
Maize
Zea mays
Fleece
30 Apr – 7 May
3 May
3-4 wk
28 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
1 Jul
3-4 wk
24 May
22 Jul
0 wk
4 Jun
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
2 Jul
0 wk
22 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
3 – 17 Apr
7 Jun
5-7 wk
22 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Potato
Solanum tuberosum
20 Apr – 4 May
1 Jun
4-6 wk
1 Jun
29 Jun
1 wk after
1 Jun
19 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Apr
17 Jun
5-7 wk
22 May
22 Jul
0 wk
23 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
7 – 14 May
11 Jun
3-4 wk
4 Jun
2 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Apr – 3 May
15 Jun
3-4 wk
24 May
6 Jul
0 wk
4 Jun
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Lettuce
Lactuca sativa
24 Apr – 1 May
6 Jul
3-4 wk
22 May
27 Jul
0 wk
23 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
29 May
2-4 wk
22 May
12 Jun
0 wk
22 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
12 Jun
0 wk
23 May
2 Jun
0 wk
Spinach
Spinacia oleracea
24 Apr – 1 May
21 Jul
3-4 wk
22 May
11 Aug
0 wk
19 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
2 – 16 Apr
12 Apr
6-8 wk
28 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
7 – 21 May
20 May
2-4 wk
4 Jun
2 wk after
4 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
19 Jun
4-6 wk
22 May
17 Jul
0 wk
Garden pea
Pisum sativum
24 Apr – 1 May
21 Jun
3-4 wk
22 May
12 Jul
0 wk
23 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
23 Apr – 7 May
20 May
4-6 wk
4 Jun
17 Jun
2 wk after
Lemon balm
Melissa officinalis
13 – 27 Mar
17 May
8-10 wk
22 May
12 Jul
0 wk
16 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
23 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
27 Mar – 10 Apr
31 May
6-8 wk
22 May
12 Jul
0 wk
23 May
2 Jul
0 wk
Spearmint
Mentha spicata
27 Feb – 27 Mar
17 May
8-12 wk
22 May
12 Jul
0 wk
16 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
22 May
11 Aug
0 wk
4 Jun
1 Aug
2 wk after
Garden sage
Salvia officinalis
15 – 29 Mar
2 May
8-10 wk
24 May
27 Jun
0 wk
Common thyme
Thymus vulgaris
13 – 27 Mar
7 May
8-10 wk
22 May
2 Jul
0 wk
Oregano
Origanum vulgare
27 Mar – 10 Apr
21 May
6-8 wk
22 May
2 Jul
0 wk
16 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
27 Mar – 10 Apr
21 May
6-8 wk
22 May
2 Jul
0 wk
23 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
15 Feb – 15 Mar
3 Apr
10-14 wk
24 May
12 Jun
0 wk

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