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Rel. frost
Last spring frost (0°C) 21 Mar Frost 9 of 10 years · 20 years of data
Frost-free season 220 days 21 Mar – 27 Oct
Probability that frost is over

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