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Rel. frost
Last spring frost (0°C) 1 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 198 days 1 Apr – 16 Oct
Probability that frost is over

10% = Half of years are frost-free by this date. More about frost & season →

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Vegetables

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