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

Herbs

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