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Method
Rel. frost
Last spring frost (0°C) 22 Mar Normal year · 20 years of data
Frost-free season 249 days 22 Mar – 26 Nov
Probability that frost is over

50% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
3 – 17 Mar
5-7 wk
21 Apr
5 wk after
18 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
25 Feb – 11 Mar
4-6 wk
8 Apr
3 wk after
18 Mar
1 wk before
Chili pepper
Capsicum annuum
22 Feb – 22 Mar
8-12 wk
17 May
10 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
8 – 22 Jan
5-7 wk
26 Feb
4 wk before
14 Mar
2 wk before
Cucumber
Cucumis sativus
19 – 26 Apr
3-4 wk
17 May
10 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 Apr
4-5 wk
17 May
10 wk after
2 May
6 wk after
Butter bean
Phaseolus lunatus
Season too short
4 – 11 Apr
3-4 wk
2 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
28 Dec – 25 Jan
8-12 wk
22 Mar
Vid frost
4 Apr
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
9 Mar
2 wk before
Sweetcorn
Zea mays
Season too short
27 Mar – 3 Apr
3-4 wk
24 Apr
5 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
24 – 31 Mar
3-4 wk
21 Apr
5 wk after
4 Apr
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
14 Mar
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
8 – 22 Jan
5-7 wk
26 Feb
4 wk before
14 Mar
2 wk before
Potato
Solanum tuberosum
Season too short
19 Jan – 2 Feb
4-6 wk
2 Mar
3 wk before
2 Mar
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
8 – 22 Jan
5-7 wk
26 Feb
4 wk before
18 Mar
1 wk before
Pumpkin
Cucurbita pepo
19 – 26 Apr
3-4 wk
17 May
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
24 – 31 Mar
3-4 wk
21 Apr
5 wk after
4 Apr
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
25 Feb – 11 Mar
4-6 wk
8 Apr
3 wk after
Lettuce
Lactuca sativa
15 – 22 Feb
3-4 wk
15 Mar
1 wk before
18 Mar
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Feb
4-6 wk
15 Mar
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
7 – 21 Jan
2-4 wk
4 Feb
7 wk before
4 Feb
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
16 Feb
5 wk before
Spinach
Spinacia oleracea
7 – 14 Feb
3-4 wk
7 Mar
3 wk before
9 Mar
3 wk before
Sweet potato
Ipomoea batatas
9 – 23 Apr
4-6 wk
21 May
11 wk after
Tomato
Solanum lycopersicum
14 – 28 Mar
6-8 wk
9 May
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
11 – 25 Apr
2-4 wk
9 May
8 wk after
2 May
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
25 Feb – 11 Mar
4-6 wk
8 Apr
3 wk after
Pea
Pisum sativum
7 – 14 Feb
3-4 wk
7 Mar
3 wk before
18 Mar
1 wk before
Current date Soon Date passed

Herbs

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Basil
Ocimum basilicum
Season too short
13 – 27 Mar
4-6 wk
24 Apr
5 wk after
Lemon balm
Melissa officinalis
11 – 25 Jan
8-10 wk
22 Mar
Vid frost
16 Apr
4 wk after
Dill
Anethum graveolens
18 Mar
1 wk before
Chives
Allium schoenoprasum
1 – 15 Jan
6-8 wk
26 Feb
4 wk before
18 Mar
1 wk before
Spearmint
Mentha spicata
13 Dec – 10 Jan
8-12 wk
7 Mar
3 wk before
16 Apr
4 wk after
Coriander
Coriandrum sativum
4 Apr
2 wk after
Sage
Salvia officinalis
10 – 24 Feb
8-10 wk
21 Apr
5 wk after
Thyme
Thymus vulgaris
28 Jan – 11 Feb
8-10 wk
8 Apr
3 wk after
Oregano
Origanum vulgare
31 Jan – 14 Feb
6-8 wk
28 Mar
1 wk after
16 Apr
4 wk after
Parsley
Petroselinum crispum
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
18 Mar
1 wk before
Rosemary
Salvia rosmarinus
13 Jan – 10 Feb
10-14 wk
21 Apr
5 wk after
Current date Soon Date passed

Annual flowers

Plant Sow indoors Transplant Direct sow
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Morning glory
Ipomoea tricolor
Fleece
30 Apr – 7 May
3-4 wk
28 May
10 wk after
Cornflower
Centaurea cyanus
7 Mar
3 wk before
18 Mar
1 wk before
Statice
Limonium sinuatum
28 Feb – 14 Mar
8-10 wk
9 May
8 wk after
Sweet William
Dianthus barbatus
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
30 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
14 – 28 Mar
6-8 wk
9 May
8 wk after
1 Jun
11 wk after
Dahlia
Dahlia × pinnata
9 – 23 Mar
6-8 wk
4 May
7 wk after
Dahlia (tubers)
Dahlia × pinnata
Season too short
24 Jan – 21 Feb
4-8 wk
21 Mar
21 Mar
Foxglove
Digitalis purpurea
27 Dec – 10 Jan
8-10 wk
7 Mar
3 wk before
4 Apr
2 wk after
Busy lizzie
Impatiens walleriana
22 Feb – 22 Mar
8-12 wk
17 May
10 wk after
Creeping zinnia
Sanvitalia procumbens
14 – 28 Mar
6-8 wk
9 May
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
5 – 19 Apr
4-6 wk
17 May
8 wk after
Chinese lantern
Physalis alkekengi
10 – 24 Feb
8-10 wk
21 Apr
5 wk after
Love in a mist
Nigella damascena
18 Mar
1 wk before
Strawflower
Xerochrysum bracteatum
14 – 28 Mar
6-8 wk
9 May
8 wk after
1 Jun
11 wk after
Tall verbena
Verbena bonariensis
27 Jan – 24 Feb
8-12 wk
21 Apr
5 wk after
Cardoon
Cynara cardunculus
Fleece
7 Feb – 7 Mar
8-12 wk
2 May
6 wk after
Regal-foxtail
Ptilotus nobilis
22 Feb – 22 Mar
8-12 wk
17 May
10 wk after
Globe amaranth
Gomphrena globosa
22 Mar – 5 Apr
6-8 wk
17 May
10 wk after
Corn poppy
Papaver rhoeas
18 Mar
1 wk before
Snapdragon
Antirrhinum majus
21 Dec – 18 Jan
8-12 wk
15 Mar
1 wk before
30 Mar
1 wk after
Flossflower
Ageratum houstonianum
8 – 22 Mar
8-10 wk
17 May
10 wk after
Sweet pea
Lathyrus odoratus
10 – 31 Jan
5-8 wk
7 Mar
3 wk before
Stock
Matthiola incana
18 Jan – 1 Feb
6-8 wk
15 Mar
1 wk before
4 Apr
2 wk after
Wormwood
Artemisia absinthium
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
4 Apr
2 wk after
Mexican sunflower
Tithonia rotundifolia
5 – 19 Apr
4-6 wk
17 May
10 wk after
Pansy
Viola × wittrockiana
18 Dec – 1 Jan
8-10 wk
26 Feb
4 wk before
30 Mar
1 wk after
Petunia
Petunia
14 Feb – 14 Mar
8-12 wk
9 May
8 wk after
Scabious
Scabiosa atropurpurea
24 Feb – 10 Mar
6-8 wk
21 Apr
5 wk after
2 May
6 wk after
Zinnia
Zinnia elegans
28 Mar – 11 Apr
4-6 wk
9 May
8 wk after
Common morning glory
Ipomoea purpurea
12 – 26 Apr
3-5 wk
17 May
10 wk after
Cosmos
Cosmos bipinnatus
28 Mar – 11 Apr
4-6 wk
9 May
8 wk after
2 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
5 Mar – 2 Apr
8-12 wk
28 May
10 wk after
Bee balm
Monarda didyma
28 Dec – 25 Jan
8-12 wk
22 Mar
Vid frost
16 Apr
4 wk after
Yarrow
Achillea millefolium
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
4 Apr
2 wk after
Safflower
Carthamus tinctorius
7 Mar
3 wk before
18 Mar
1 wk before
Iceland poppy
Papaver nudicaule
1 – 15 Jan
6-8 wk
26 Feb
4 wk before
14 Mar
2 wk before
Bishop's flower
Ammi majus
19 Feb – 5 Mar
4-6 wk
2 Apr
2 wk after
4 Apr
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
22 Feb – 8 Mar
10-12 wk
17 May
8 wk after
Sunflower
Helianthus annuus
11 – 18 Apr
3-4 wk
9 May
8 wk after
16 Apr
4 wk after
China aster
Callistephus chinensis
14 – 28 Mar
6-8 wk
9 May
8 wk after
2 May
6 wk after
Annual phlox
Phlox drummondii
2 – 16 Mar
6-8 wk
27 Apr
6 wk after
2 May
6 wk after
Hollyhock
Alcea rosea
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
4 Apr
2 wk after
Delphinium
Delphinium elatum
14 Jan – 11 Feb
8-12 wk
8 Apr
3 wk after
16 Apr
4 wk after
African marigold
Tagetes erecta
14 – 28 Mar
6-8 wk
9 May
8 wk after
Black-eyed Susan
Rudbeckia hirta
24 Feb – 10 Mar
6-8 wk
21 Apr
5 wk after
2 May
6 wk after
Woodland sage
Salvia nemorosa
17 – 31 Jan
8-10 wk
28 Mar
1 wk after
16 Apr
4 wk after
Black-eyed susan vine
Thunbergia alata
8 Mar – 5 Apr
6-10 wk
17 May
10 wk after
California goldenpoppy
Eschscholzia californica
18 Mar
1 wk before
Painted tongue
Salpiglossis sinuata
28 Feb – 14 Mar
8-10 wk
9 May
8 wk after
Water forget-me-not
Myosotis scorpioides
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
4 Apr
2 wk after
Current date Soon Date passed