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Rel. frost
Last spring frost (0°C) 26 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 228 days 26 Mar – 9 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)
7 – 21 Mar
5-7 wk
25 Apr
5 wk after
22 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
1 – 15 Mar
4-6 wk
12 Apr
3 wk after
22 Mar
1 wk before
Chili pepper
Capsicum annuum
Fleece
26 Feb – 26 Mar
8-12 wk
21 May
8 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
12 – 26 Jan
5-7 wk
2 Mar
4 wk before
18 Mar
2 wk before
Cucumber
Cucumis sativus
Fleece
23 – 30 Apr
3-4 wk
21 May
8 wk after
Florence Fennel
Foeniculum vulgare
Fleece
16 – 23 Apr
4-5 wk
21 May
8 wk after
21 Apr
4 wk after
Butter bean
Phaseolus lunatus
Season too short
8 – 15 Apr
3-4 wk
6 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
1 – 29 Jan
8-12 wk
26 Mar
Vid frost
8 Apr
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
13 Mar
2 wk before
Sweetcorn
Zea mays
Season too short
31 Mar – 7 Apr
3-4 wk
28 Apr
5 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
28 Mar – 4 Apr
3-4 wk
25 Apr
5 wk after
8 Apr
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 Mar
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
12 – 26 Jan
5-7 wk
2 Mar
4 wk before
18 Mar
2 wk before
Potato
Solanum tuberosum
Season too short
23 Jan – 6 Feb
4-6 wk
6 Mar
3 wk before
6 Mar
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
12 – 26 Jan
5-7 wk
2 Mar
4 wk before
22 Mar
1 wk before
Pumpkin
Cucurbita pepo
Fleece
23 – 30 Apr
3-4 wk
21 May
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
28 Mar – 4 Apr
3-4 wk
25 Apr
5 wk after
8 Apr
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
1 – 15 Mar
4-6 wk
12 Apr
3 wk after
Lettuce
Lactuca sativa
19 – 26 Feb
3-4 wk
19 Mar
1 wk before
22 Mar
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
5 – 19 Feb
4-6 wk
19 Mar
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
11 – 25 Jan
2-4 wk
8 Feb
7 wk before
8 Feb
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
20 Feb
5 wk before
Spinach
Spinacia oleracea
11 – 18 Feb
3-4 wk
11 Mar
3 wk before
13 Mar
3 wk before
Sweet potato
Ipomoea batatas
13 – 27 Apr
4-6 wk
25 May
11 wk after
Tomato
Solanum lycopersicum
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
15 – 29 Apr
2-4 wk
13 May
8 wk after
6 May
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
1 – 15 Mar
4-6 wk
12 Apr
3 wk after
Pea
Pisum sativum
11 – 18 Feb
3-4 wk
11 Mar
3 wk before
22 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
17 – 31 Mar
4-6 wk
28 Apr
5 wk after
Lemon balm
Melissa officinalis
15 – 29 Jan
8-10 wk
26 Mar
Vid frost
20 Apr
4 wk after
Dill
Anethum graveolens
22 Mar
1 wk before
Chives
Allium schoenoprasum
5 – 19 Jan
6-8 wk
2 Mar
4 wk before
22 Mar
1 wk before
Spearmint
Mentha spicata
17 Dec – 14 Jan
8-12 wk
11 Mar
3 wk before
20 Apr
4 wk after
Coriander
Coriandrum sativum
8 Apr
2 wk after
Sage
Salvia officinalis
14 – 28 Feb
8-10 wk
25 Apr
5 wk after
Thyme
Thymus vulgaris
1 – 15 Feb
8-10 wk
12 Apr
3 wk after
Oregano
Origanum vulgare
4 – 18 Feb
6-8 wk
1 Apr
1 wk after
20 Apr
4 wk after
Parsley
Petroselinum crispum
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
22 Mar
1 wk before
Rosemary
Salvia rosmarinus
17 Jan – 14 Feb
10-14 wk
25 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
Greenhouse
23 – 30 Apr
3-4 wk
21 May
8 wk after
Cornflower
Centaurea cyanus
11 Mar
3 wk before
22 Mar
1 wk before
Statice
Limonium sinuatum
4 – 18 Mar
8-10 wk
13 May
8 wk after
Sweet William
Dianthus barbatus
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
3 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
5 Jun
11 wk after
Dahlia
Dahlia × pinnata
13 – 27 Mar
6-8 wk
8 May
7 wk after
Dahlia (tubers)
Dahlia × pinnata
Season too short
28 Jan – 25 Feb
4-8 wk
25 Mar
25 Mar
Foxglove
Digitalis purpurea
31 Dec – 14 Jan
8-10 wk
11 Mar
3 wk before
8 Apr
2 wk after
Busy lizzie
Impatiens walleriana
26 Feb – 26 Mar
8-12 wk
21 May
10 wk after
Creeping zinnia
Sanvitalia procumbens
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
9 – 23 Apr
4-6 wk
21 May
8 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Feb
8-10 wk
25 Apr
5 wk after
Love in a mist
Nigella damascena
22 Mar
1 wk before
Strawflower
Xerochrysum bracteatum
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
5 Jun
11 wk after
Tall verbena
Verbena bonariensis
31 Jan – 28 Feb
8-12 wk
25 Apr
5 wk after
Cardoon
Cynara cardunculus
Fleece
11 Feb – 11 Mar
8-12 wk
6 May
6 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
26 Feb – 26 Mar
8-12 wk
21 May
8 wk after
Globe amaranth
Gomphrena globosa
Fleece
26 Mar – 9 Apr
6-8 wk
21 May
8 wk after
Corn poppy
Papaver rhoeas
22 Mar
1 wk before
Snapdragon
Antirrhinum majus
25 Dec – 22 Jan
8-12 wk
19 Mar
1 wk before
3 Apr
1 wk after
Flossflower
Ageratum houstonianum
Fleece
12 – 26 Mar
8-10 wk
21 May
8 wk after
Sweet pea
Lathyrus odoratus
14 Jan – 4 Feb
5-8 wk
11 Mar
3 wk before
Stock
Matthiola incana
22 Jan – 5 Feb
6-8 wk
19 Mar
1 wk before
8 Apr
2 wk after
Wormwood
Artemisia absinthium
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
8 Apr
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
9 – 23 Apr
4-6 wk
21 May
8 wk after
Pansy
Viola × wittrockiana
22 Dec – 5 Jan
8-10 wk
2 Mar
4 wk before
3 Apr
1 wk after
Petunia
Petunia
18 Feb – 18 Mar
8-12 wk
13 May
8 wk after
Scabious
Scabiosa atropurpurea
28 Feb – 14 Mar
6-8 wk
25 Apr
5 wk after
6 May
6 wk after
Zinnia
Zinnia elegans
1 – 15 Apr
4-6 wk
13 May
8 wk after
Common morning glory
Ipomoea purpurea
Fleece
16 – 30 Apr
3-5 wk
21 May
8 wk after
Cosmos
Cosmos bipinnatus
1 – 15 Apr
4-6 wk
13 May
8 wk after
6 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
26 Feb – 26 Mar
8-12 wk
21 May
8 wk after
Bee balm
Monarda didyma
1 – 29 Jan
8-12 wk
26 Mar
Vid frost
20 Apr
4 wk after
Yarrow
Achillea millefolium
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
8 Apr
2 wk after
Safflower
Carthamus tinctorius
11 Mar
3 wk before
22 Mar
1 wk before
Iceland poppy
Papaver nudicaule
5 – 19 Jan
6-8 wk
2 Mar
4 wk before
18 Mar
2 wk before
Bishop's flower
Ammi majus
23 Feb – 9 Mar
4-6 wk
6 Apr
2 wk after
8 Apr
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
26 Feb – 12 Mar
10-12 wk
21 May
8 wk after
Sunflower
Helianthus annuus
15 – 22 Apr
3-4 wk
13 May
8 wk after
20 Apr
4 wk after
China aster
Callistephus chinensis
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
6 May
6 wk after
Annual phlox
Phlox drummondii
6 – 20 Mar
6-8 wk
1 May
6 wk after
6 May
6 wk after
Hollyhock
Alcea rosea
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
8 Apr
2 wk after
Delphinium
Delphinium elatum
18 Jan – 15 Feb
8-12 wk
12 Apr
3 wk after
20 Apr
4 wk after
African marigold
Tagetes erecta
18 Mar – 1 Apr
6-8 wk
13 May
8 wk after
Black-eyed Susan
Rudbeckia hirta
28 Feb – 14 Mar
6-8 wk
25 Apr
5 wk after
6 May
6 wk after
Woodland sage
Salvia nemorosa
21 Jan – 4 Feb
8-10 wk
1 Apr
1 wk after
20 Apr
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
12 Mar – 9 Apr
6-10 wk
21 May
8 wk after
California goldenpoppy
Eschscholzia californica
22 Mar
1 wk before
Painted tongue
Salpiglossis sinuata
4 – 18 Mar
8-10 wk
13 May
8 wk after
Water forget-me-not
Myosotis scorpioides
14 – 28 Jan
6-8 wk
11 Mar
3 wk before
8 Apr
2 wk after
Current date Soon Date passed