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Method
Rel. frost
Last spring frost (0°C) 2 May Frost 1 of 10 years · 20 years of data
Frost-free season 205 days 2 May – 23 Nov
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)
15 – 29 Apr
22 Jun
5-7 wk
3 Jun
27 Jul
5 wk after
26 Apr
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Apr
4 Jul
4-6 wk
22 May
1 Aug
3 wk after
26 Apr
22 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
20 Mar – 17 Apr
15 Apr
8-12 wk
12 Jun
6 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
12 – 26 Feb
17 Jun
5-7 wk
2 Apr
22 Jul
4 wk before
19 Apr
12 Jul
2 wk before
Garden cucumber
Cucumis sativus
10 – 17 Jun
3-4 wk
8 Jul
10 wk after
Florence Fennel
Foeniculum vulgare
3 – 10 Jun
14 Jun
4-5 wk
8 Jul
12 Jul
10 wk after
12 Jun
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
14 – 21 Jun
3-4 wk
12 Jul
10 wk after
Onion
Allium cepa (Cepa-gruppen)
7 Feb – 7 Mar
7 Apr
8-12 wk
2 May
2 Jun
Vid frost
15 May
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
26 Apr
22 Jun
1 wk before
26 Apr
12 Jun
1 wk before
Maize
Zea mays
Fleece
15 – 22 May
30 May
3-4 wk
12 Jun
20 Jun
6 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 May
11 Jul
3-4 wk
3 Jun
1 Aug
5 wk after
15 May
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
19 Apr
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
12 – 26 Feb
17 Jun
5-7 wk
2 Apr
22 Jul
4 wk before
19 Apr
12 Jul
2 wk before
Potato
Solanum tuberosum
26 Mar – 9 Apr
14 Jun
4-6 wk
7 May
12 Jul
1 wk after
7 May
2 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
12 – 26 Feb
27 Jun
5-7 wk
2 Apr
1 Aug
4 wk before
26 Apr
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
10 – 17 Jun
14 Jun
3-4 wk
8 Jul
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 May
11 Jul
3-4 wk
3 Jun
1 Aug
5 wk after
15 May
22 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
10 – 24 Apr
29 Jun
4-6 wk
22 May
27 Jul
3 wk after
Lettuce
Lactuca sativa
26 Mar – 2 Apr
16 Jul
3-4 wk
23 Apr
6 Aug
1 wk before
26 Apr
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
12 – 26 Mar
29 Jun
4-6 wk
23 Apr
27 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Mar – 5 Apr
8 Jun
2-4 wk
19 Apr
22 Jun
2 wk before
19 Apr
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
26 Apr
22 Jun
1 wk before
26 Apr
12 Jun
1 wk before
Spinach
Spinacia oleracea
15 – 22 Mar
31 Jul
3-4 wk
12 Apr
21 Aug
3 wk before
12 Apr
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
3 – 17 Jun
4-6 wk
15 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
17 Apr – 1 May
9 May
6-8 wk
12 Jun
20 Jun
6 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 May – 13 Jun
16 Jun
2-4 wk
27 Jun
30 Jun
8 wk after
12 Jun
20 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
10 – 24 Apr
29 Jun
4-6 wk
22 May
27 Jul
3 wk after
Garden pea
Pisum sativum
15 – 22 Mar
1 Jul
3-4 wk
12 Apr
22 Jul
3 wk before
26 Apr
12 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
27 May – 10 Jun
4-6 wk
8 Jul
10 wk after
Lemon balm
Melissa officinalis
21 Feb – 7 Mar
27 May
8-10 wk
2 May
22 Jul
Vid frost
28 May
12 Jul
4 wk after
Dill
Anethum graveolens
26 Apr
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
5 – 19 Feb
10 Jun
6-8 wk
2 Apr
22 Jul
4 wk before
26 Apr
12 Jul
1 wk before
Spearmint
Mentha spicata
18 Jan – 15 Feb
27 May
8-12 wk
12 Apr
22 Jul
3 wk before
28 May
12 Jul
4 wk after
Coriander
Coriandrum sativum
15 May
11 Aug
2 wk after
Garden sage
Salvia officinalis
25 Mar – 8 Apr
12 May
8-10 wk
3 Jun
7 Jul
5 wk after
Common thyme
Thymus vulgaris
13 – 27 Mar
17 May
8-10 wk
22 May
12 Jul
3 wk after
Oregano
Origanum vulgare
16 – 30 Mar
31 May
6-8 wk
11 May
12 Jul
1 wk after
28 May
2 Jul
4 wk after
Parsley
Petroselinum crispum
15 Feb – 1 Mar
31 May
6-8 wk
12 Apr
12 Jul
3 wk before
26 Apr
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
25 Feb – 25 Mar
13 Apr
10-14 wk
3 Jun
22 Jun
5 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
10 – 17 Jun
3-4 wk
8 Jul
10 wk after
Cornflower
Centaurea cyanus
12 Apr
22 Jul
3 wk before
26 Apr
12 Jul
1 wk before
Statice
Limonium sinuatum
18 Apr – 2 May
6 May
8-10 wk
27 Jun
1 Jul
8 wk after
Sweet William
Dianthus barbatus
15 Feb – 1 Mar
6-8 wk
12 Apr
3 wk before
7 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 May
20 May
6-8 wk
27 Jun
1 Jul
8 wk after
15 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
25 Apr – 9 May
31 May
6-8 wk
20 Jun
12 Jul
7 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 Apr
14 Jun
4-8 wk
28 May
12 Jul
4 wk after
28 May
2 Jul
4 wk after
Foxglove
Digitalis purpurea
1 – 15 Feb
8-10 wk
12 Apr
3 wk before
15 May
2 wk after
Busy lizzie
Impatiens walleriana
15 Apr – 13 May
1 Jul
8-12 wk
8 Jul
26 Aug
10 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 May
30 May
6-8 wk
27 Jun
11 Jul
8 wk after
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 May
4-6 wk
27 Jun
8 wk after
Chinese lantern
Physalis alkekengi
25 Mar – 8 Apr
27 Apr
8-10 wk
3 Jun
22 Jun
5 wk after
Love in a mist
Nigella damascena
26 Apr
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
2 – 16 May
10 May
6-8 wk
27 Jun
8 wk after
15 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
11 Mar – 8 Apr
27 Apr
8-12 wk
3 Jun
22 Jun
5 wk after
Cardoon
Cynara cardunculus
4 Apr – 2 May
8-12 wk
27 Jun
8 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
4 Apr – 2 May
6 May
8-12 wk
27 Jun
1 Jul
8 wk after
Globe amaranth
Gomphrena globosa
Fleece
2 – 16 May
20 May
6-8 wk
27 Jun
1 Jul
8 wk after
Corn poppy
Papaver rhoeas
26 Apr
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
29 Jan – 26 Feb
17 May
8-12 wk
23 Apr
12 Jul
1 wk before
7 May
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
29 Apr – 13 May
16 May
8-10 wk
8 Jul
11 Jul
10 wk after
Sweet pea
Lathyrus odoratus
15 Feb – 8 Mar
7 Jun
5-8 wk
12 Apr
12 Jul
3 wk before
Stock
Matthiola incana
26 Feb – 12 Mar
10 Jun
6-8 wk
23 Apr
22 Jul
1 wk before
15 May
12 Jul
2 wk after
Wormwood
Artemisia absinthium
15 Feb – 1 Mar
11 May
6-8 wk
12 Apr
22 Jun
3 wk before
15 May
12 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
16 – 30 May
29 May
4-6 wk
27 Jun
8 wk after
Garden pansy
Viola × wittrockiana
22 Jan – 5 Feb
27 May
8-10 wk
2 Apr
22 Jul
4 wk before
7 May
12 Jul
1 wk after
Petunia
Petunia
4 Apr – 2 May
6 May
8-12 wk
27 Jun
1 Jul
8 wk after
Sweet Scabious
Scabiosa atropurpurea
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
5 wk after
12 Jun
12 Jun
6 wk after
Common zinnia
Zinnia elegans
16 – 30 May
13 Jun
4-6 wk
27 Jun
11 Jul
8 wk after
Common morning glory
Ipomoea purpurea
3 – 17 Jun
3-5 wk
8 Jul
10 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 May
14 Jun
4-6 wk
27 Jun
12 Jul
8 wk after
12 Jun
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
22 Apr – 20 May
15 May
8-12 wk
15 Jul
11 wk after
Bee balm
Monarda didyma
7 Feb – 7 Mar
27 Apr
8-12 wk
2 May
22 Jun
Vid frost
28 May
12 Jun
4 wk after
Yarrow
Achillea millefolium
15 Feb – 1 Mar
11 Apr
6-8 wk
12 Apr
23 May
3 wk before
15 May
2 wk after
Safflower
Carthamus tinctorius
12 Apr
22 Jun
3 wk before
26 Apr
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
5 – 19 Feb
31 May
6-8 wk
2 Apr
12 Jul
4 wk before
19 Apr
2 Jul
2 wk before
Bishop's flower
Ammi majus
5 – 19 Apr
14 Jun
4-6 wk
17 May
12 Jul
2 wk after
15 May
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
4 – 18 Apr
13 Apr
10-12 wk
27 Jun
8 wk after
Sunflower
Helianthus annuus
30 May – 6 Jun
21 Jun
3-4 wk
27 Jun
12 Jul
8 wk after
28 May
2 Jul
4 wk after
China aster
Callistephus chinensis
2 – 16 May
10 Jun
6-8 wk
27 Jun
22 Jul
8 wk after
12 Jun
12 Jul
6 wk after
Annual phlox
Phlox drummondii
17 Apr – 1 May
30 May
6-8 wk
12 Jun
11 Jul
6 wk after
12 Jun
1 Jul
6 wk after
Hollyhock
Alcea rosea
15 Feb – 1 Mar
6-8 wk
12 Apr
3 wk before
15 May
2 wk after
Alpine delphinium
Delphinium elatum
27 Feb – 27 Mar
27 Apr
8-12 wk
22 May
22 Jun
3 wk after
28 May
12 Jun
4 wk after
African marigold
Tagetes erecta
2 – 16 May
30 May
6-8 wk
27 Jun
11 Jul
8 wk after
Black-eyed Susan
Rudbeckia hirta
8 – 22 Apr
31 May
6-8 wk
3 Jun
12 Jul
5 wk after
12 Jun
2 Jul
6 wk after
Wood sage
Salvia nemorosa
2 – 16 Mar
17 Apr
8-10 wk
11 May
12 Jun
1 wk after
28 May
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
29 Apr – 27 May
9 May
6-10 wk
8 Jul
10 wk after
California goldenpoppy
Eschscholzia californica
26 Apr
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
18 Apr – 2 May
17 May
8-10 wk
27 Jun
12 Jul
8 wk after
Water forget-me-not
Myosotis scorpioides
15 Feb – 1 Mar
11 May
6-8 wk
12 Apr
22 Jun
3 wk before
15 May
12 Jun
2 wk after