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Rel. frost
Last spring frost (0°C) 20 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 245 days 20 Mar – 20 Nov
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
Date Growing timeGrow. time Date Rel. frost Date Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
1 – 15 Mar
5-7 wk
19 Apr
5 wk after
16 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
23 Feb – 9 Mar
4-6 wk
6 Apr
3 wk after
16 Mar
1 wk before
Chili pepper
Capsicum annuum
20 Feb – 20 Mar
8-12 wk
15 May
10 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
6 – 20 Jan
5-7 wk
24 Feb
4 wk before
12 Mar
2 wk before
Cucumber
Cucumis sativus
17 – 24 Apr
3-4 wk
15 May
10 wk after
Florence Fennel
Foeniculum vulgare
10 – 17 Apr
4-5 wk
15 May
10 wk after
30 Apr
6 wk after
Butter bean
Phaseolus lunatus
Season too short
2 – 9 Apr
3-4 wk
30 Apr
6 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Dec – 23 Jan
8-12 wk
20 Mar
Vid frost
2 Apr
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
7 Mar
2 wk before
Sweetcorn
Zea mays
Season too short
25 Mar – 1 Apr
3-4 wk
22 Apr
5 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Mar
3-4 wk
19 Apr
5 wk after
2 Apr
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 Mar
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
6 – 20 Jan
5-7 wk
24 Feb
4 wk before
12 Mar
2 wk before
Potato
Solanum tuberosum
Season too short
17 – 31 Jan
4-6 wk
28 Feb
3 wk before
28 Feb
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
6 – 20 Jan
5-7 wk
24 Feb
4 wk before
16 Mar
1 wk before
Pumpkin
Cucurbita pepo
17 – 24 Apr
3-4 wk
15 May
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Mar
3-4 wk
19 Apr
5 wk after
2 Apr
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
23 Feb – 9 Mar
4-6 wk
6 Apr
3 wk after
Lettuce
Lactuca sativa
13 – 20 Feb
3-4 wk
13 Mar
1 wk before
16 Mar
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
30 Jan – 13 Feb
4-6 wk
13 Mar
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
5 – 19 Jan
2-4 wk
2 Feb
7 wk before
2 Feb
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
14 Feb
5 wk before
Spinach
Spinacia oleracea
5 – 12 Feb
3-4 wk
5 Mar
3 wk before
7 Mar
3 wk before
Sweet potato
Ipomoea batatas
7 – 21 Apr
4-6 wk
19 May
11 wk after
Tomato
Solanum lycopersicum
12 – 26 Mar
6-8 wk
7 May
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
9 – 23 Apr
2-4 wk
7 May
8 wk after
30 Apr
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
23 Feb – 9 Mar
4-6 wk
6 Apr
3 wk after
Pea
Pisum sativum
5 – 12 Feb
3-4 wk
5 Mar
3 wk before
16 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
11 – 25 Mar
4-6 wk
22 Apr
5 wk after
Lemon balm
Melissa officinalis
9 – 23 Jan
8-10 wk
20 Mar
Vid frost
14 Apr
4 wk after
Dill
Anethum graveolens
16 Mar
1 wk before
Chives
Allium schoenoprasum
30 Dec – 13 Jan
6-8 wk
24 Feb
4 wk before
16 Mar
1 wk before
Spearmint
Mentha spicata
11 Dec – 8 Jan
8-12 wk
5 Mar
3 wk before
14 Apr
4 wk after
Coriander
Coriandrum sativum
2 Apr
2 wk after
Sage
Salvia officinalis
8 – 22 Feb
8-10 wk
19 Apr
5 wk after
Thyme
Thymus vulgaris
26 Jan – 9 Feb
8-10 wk
6 Apr
3 wk after
Oregano
Origanum vulgare
29 Jan – 12 Feb
6-8 wk
26 Mar
1 wk after
14 Apr
4 wk after
Parsley
Petroselinum crispum
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
16 Mar
1 wk before
Rosemary
Salvia rosmarinus
11 Jan – 8 Feb
10-14 wk
19 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
28 Apr – 5 May
3-4 wk
26 May
10 wk after
Cornflower
Centaurea cyanus
5 Mar
3 wk before
16 Mar
1 wk before
Statice
Limonium sinuatum
26 Feb – 12 Mar
8-10 wk
7 May
8 wk after
Sweet William
Dianthus barbatus
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
28 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
12 – 26 Mar
6-8 wk
7 May
8 wk after
30 May
11 wk after
Dahlia
Dahlia × pinnata
7 – 21 Mar
6-8 wk
2 May
7 wk after
Dahlia (tubers)
Dahlia × pinnata
Season too short
22 Jan – 19 Feb
4-8 wk
19 Mar
19 Mar
Foxglove
Digitalis purpurea
25 Dec – 8 Jan
8-10 wk
5 Mar
3 wk before
2 Apr
2 wk after
Busy lizzie
Impatiens walleriana
20 Feb – 20 Mar
8-12 wk
15 May
10 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 Mar
6-8 wk
7 May
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
3 – 17 Apr
4-6 wk
15 May
8 wk after
Chinese lantern
Physalis alkekengi
8 – 22 Feb
8-10 wk
19 Apr
5 wk after
Love in a mist
Nigella damascena
16 Mar
1 wk before
Strawflower
Xerochrysum bracteatum
12 – 26 Mar
6-8 wk
7 May
8 wk after
30 May
11 wk after
Tall verbena
Verbena bonariensis
25 Jan – 22 Feb
8-12 wk
19 Apr
5 wk after
Cardoon
Cynara cardunculus
Fleece
5 Feb – 5 Mar
8-12 wk
30 Apr
6 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
20 Feb – 20 Mar
8-12 wk
15 May
8 wk after
Globe amaranth
Gomphrena globosa
20 Mar – 3 Apr
6-8 wk
15 May
10 wk after
Corn poppy
Papaver rhoeas
16 Mar
1 wk before
Snapdragon
Antirrhinum majus
19 Dec – 16 Jan
8-12 wk
13 Mar
1 wk before
28 Mar
1 wk after
Flossflower
Ageratum houstonianum
6 – 20 Mar
8-10 wk
15 May
10 wk after
Sweet pea
Lathyrus odoratus
8 – 29 Jan
5-8 wk
5 Mar
3 wk before
Stock
Matthiola incana
16 – 30 Jan
6-8 wk
13 Mar
1 wk before
2 Apr
2 wk after
Wormwood
Artemisia absinthium
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
2 Apr
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
3 – 17 Apr
4-6 wk
15 May
8 wk after
Pansy
Viola × wittrockiana
16 – 30 Dec
8-10 wk
24 Feb
4 wk before
28 Mar
1 wk after
Petunia
Petunia
12 Feb – 12 Mar
8-12 wk
7 May
8 wk after
Scabious
Scabiosa atropurpurea
22 Feb – 8 Mar
6-8 wk
19 Apr
5 wk after
30 Apr
6 wk after
Zinnia
Zinnia elegans
26 Mar – 9 Apr
4-6 wk
7 May
8 wk after
Common morning glory
Ipomoea purpurea
10 – 24 Apr
3-5 wk
15 May
10 wk after
Cosmos
Cosmos bipinnatus
26 Mar – 9 Apr
4-6 wk
7 May
8 wk after
30 Apr
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
3 – 31 Mar
8-12 wk
26 May
10 wk after
Bee balm
Monarda didyma
26 Dec – 23 Jan
8-12 wk
20 Mar
Vid frost
14 Apr
4 wk after
Yarrow
Achillea millefolium
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
2 Apr
2 wk after
Safflower
Carthamus tinctorius
5 Mar
3 wk before
16 Mar
1 wk before
Iceland poppy
Papaver nudicaule
30 Dec – 13 Jan
6-8 wk
24 Feb
4 wk before
12 Mar
2 wk before
Bishop's flower
Ammi majus
17 Feb – 3 Mar
4-6 wk
31 Mar
2 wk after
2 Apr
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
20 Feb – 6 Mar
10-12 wk
15 May
8 wk after
Sunflower
Helianthus annuus
9 – 16 Apr
3-4 wk
7 May
8 wk after
14 Apr
4 wk after
China aster
Callistephus chinensis
12 – 26 Mar
6-8 wk
7 May
8 wk after
30 Apr
6 wk after
Annual phlox
Phlox drummondii
28 Feb – 14 Mar
6-8 wk
25 Apr
6 wk after
30 Apr
6 wk after
Hollyhock
Alcea rosea
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
2 Apr
2 wk after
Delphinium
Delphinium elatum
12 Jan – 9 Feb
8-12 wk
6 Apr
3 wk after
14 Apr
4 wk after
African marigold
Tagetes erecta
12 – 26 Mar
6-8 wk
7 May
8 wk after
Black-eyed Susan
Rudbeckia hirta
22 Feb – 8 Mar
6-8 wk
19 Apr
5 wk after
30 Apr
6 wk after
Woodland sage
Salvia nemorosa
15 – 29 Jan
8-10 wk
26 Mar
1 wk after
14 Apr
4 wk after
Black-eyed susan vine
Thunbergia alata
6 Mar – 3 Apr
6-10 wk
15 May
10 wk after
California goldenpoppy
Eschscholzia californica
16 Mar
1 wk before
Painted tongue
Salpiglossis sinuata
26 Feb – 12 Mar
8-10 wk
7 May
8 wk after
Water forget-me-not
Myosotis scorpioides
8 – 22 Jan
6-8 wk
5 Mar
3 wk before
2 Apr
2 wk after
Current date Soon Date passed