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Rel. frost
Last spring frost (0°C) 24 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 239 days 24 Mar – 18 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
18 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
2 – 16 Mar
4-6 wk
13 Apr
3 wk after
18 Mar
1 wk before
Chili pepper
Capsicum annuum
Fleece
24 Feb – 24 Mar
8-12 wk
19 May
8 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
4 – 18 Jan
5-7 wk
22 Feb
4 wk before
11 Mar
2 wk before
Cucumber
Cucumis sativus
Fleece
21 – 28 Apr
3-4 wk
19 May
8 wk after
Florence Fennel
Foeniculum vulgare
Fleece
14 – 21 Apr
4-5 wk
19 May
8 wk after
19 Apr
4 wk after
Butter bean
Phaseolus lunatus
Greenhouse
6 – 13 Apr
3-4 wk
4 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
30 Dec – 27 Jan
8-12 wk
24 Mar
Vid frost
6 Apr
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 Apr
2 wk after
6 Apr
2 wk after
Sweetcorn
Zea mays
Fleece
11 – 18 Apr
3-4 wk
9 May
7 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
28 Mar – 4 Apr
3-4 wk
25 Apr
5 wk after
6 Apr
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
11 Mar
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
4 – 18 Jan
5-7 wk
22 Feb
4 wk before
11 Mar
2 wk before
Potato
Solanum tuberosum
15 Feb – 1 Mar
4-6 wk
29 Mar
1 wk after
29 Mar
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
4 – 18 Jan
5-7 wk
22 Feb
4 wk before
18 Mar
1 wk before
Pumpkin
Cucurbita pepo
Fleece
21 – 28 Apr
3-4 wk
19 May
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
28 Mar – 4 Apr
3-4 wk
25 Apr
5 wk after
6 Apr
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
2 – 16 Mar
4-6 wk
13 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)
11 – 25 Feb
2-4 wk
11 Mar
2 wk before
11 Mar
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 Mar
1 wk before
18 Mar
1 wk before
Spinach
Spinacia oleracea
4 – 11 Feb
3-4 wk
4 Mar
3 wk before
4 Mar
3 wk before
Sweet potato
Ipomoea batatas
25 Apr – 9 May
4-6 wk
6 Jun
11 wk after
Tomato
Solanum lycopersicum
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
21 Apr – 5 May
2-4 wk
19 May
8 wk after
4 May
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
2 – 16 Mar
4-6 wk
13 Apr
3 wk after
Pea
Pisum sativum
4 – 11 Feb
3-4 wk
4 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
Fleece
28 Mar – 11 Apr
4-6 wk
9 May
7 wk after
Lemon balm
Melissa officinalis
13 – 27 Jan
8-10 wk
24 Mar
Vid frost
19 Apr
4 wk after
Dill
Anethum graveolens
18 Mar
1 wk before
Chives
Allium schoenoprasum
28 Dec – 11 Jan
6-8 wk
22 Feb
4 wk before
18 Mar
1 wk before
Spearmint
Mentha spicata
10 Dec – 7 Jan
8-12 wk
4 Mar
3 wk before
19 Apr
4 wk after
Coriander
Coriandrum sativum
6 Apr
2 wk after
Sage
Salvia officinalis
14 – 28 Feb
8-10 wk
25 Apr
5 wk after
Thyme
Thymus vulgaris
2 – 16 Feb
8-10 wk
13 Apr
3 wk after
Oregano
Origanum vulgare
5 – 19 Feb
6-8 wk
2 Apr
1 wk after
19 Apr
4 wk after
Parsley
Petroselinum crispum
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
18 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
21 – 28 Apr
3-4 wk
19 May
8 wk after
Cornflower
Centaurea cyanus
4 Mar
3 wk before
18 Mar
1 wk before
Statice
Limonium sinuatum
10 – 24 Mar
8-10 wk
19 May
8 wk after
Sweet William
Dianthus barbatus
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
29 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
6 Jun
11 wk after
Dahlia
Dahlia × pinnata
17 – 31 Mar
6-8 wk
12 May
7 wk after
Dahlia (tubers)
Dahlia × pinnata
22 Feb – 22 Mar
4-8 wk
19 Apr
4 wk after
19 Apr
4 wk after
Foxglove
Digitalis purpurea
24 Dec – 7 Jan
8-10 wk
4 Mar
3 wk before
6 Apr
2 wk after
Busy lizzie
Impatiens walleriana
7 Mar – 4 Apr
8-12 wk
30 May
10 wk after
Creeping zinnia
Sanvitalia procumbens
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
7 – 21 Apr
4-6 wk
19 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
18 Mar
1 wk before
Strawflower
Xerochrysum bracteatum
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
6 Jun
11 wk after
Tall verbena
Verbena bonariensis
31 Jan – 28 Feb
8-12 wk
25 Apr
5 wk after
Cardoon
Cynara cardunculus
Fleece
9 Feb – 9 Mar
8-12 wk
4 May
6 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
24 Feb – 24 Mar
8-12 wk
19 May
8 wk after
Globe amaranth
Gomphrena globosa
Fleece
24 Mar – 7 Apr
6-8 wk
19 May
8 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
29 Mar
1 wk after
Flossflower
Ageratum houstonianum
Fleece
10 – 24 Mar
8-10 wk
19 May
8 wk after
Sweet pea
Lathyrus odoratus
7 – 28 Jan
5-8 wk
4 Mar
3 wk before
Stock
Matthiola incana
18 Jan – 1 Feb
6-8 wk
15 Mar
1 wk before
6 Apr
2 wk after
Wormwood
Artemisia absinthium
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
6 Apr
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
7 – 21 Apr
4-6 wk
19 May
8 wk after
Pansy
Viola × wittrockiana
14 – 28 Dec
8-10 wk
22 Feb
4 wk before
29 Mar
1 wk after
Petunia
Petunia
24 Feb – 24 Mar
8-12 wk
19 May
8 wk after
Scabious
Scabiosa atropurpurea
28 Feb – 14 Mar
6-8 wk
25 Apr
5 wk after
4 May
6 wk after
Zinnia
Zinnia elegans
7 – 21 Apr
4-6 wk
19 May
8 wk after
Common morning glory
Ipomoea purpurea
Fleece
14 – 28 Apr
3-5 wk
19 May
8 wk after
Cosmos
Cosmos bipinnatus
7 – 21 Apr
4-6 wk
19 May
8 wk after
4 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
24 Feb – 24 Mar
8-12 wk
19 May
8 wk after
Bee balm
Monarda didyma
30 Dec – 27 Jan
8-12 wk
24 Mar
Vid frost
19 Apr
4 wk after
Yarrow
Achillea millefolium
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
6 Apr
2 wk after
Safflower
Carthamus tinctorius
4 Mar
3 wk before
18 Mar
1 wk before
Iceland poppy
Papaver nudicaule
28 Dec – 11 Jan
6-8 wk
22 Feb
4 wk before
11 Mar
2 wk before
Bishop's flower
Ammi majus
25 Feb – 11 Mar
4-6 wk
8 Apr
2 wk after
6 Apr
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
24 Feb – 10 Mar
10-12 wk
19 May
8 wk after
Sunflower
Helianthus annuus
21 – 28 Apr
3-4 wk
19 May
8 wk after
19 Apr
4 wk after
China aster
Callistephus chinensis
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
4 May
6 wk after
Annual phlox
Phlox drummondii
9 – 23 Mar
6-8 wk
4 May
6 wk after
4 May
6 wk after
Hollyhock
Alcea rosea
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
6 Apr
2 wk after
Delphinium
Delphinium elatum
19 Jan – 16 Feb
8-12 wk
13 Apr
3 wk after
19 Apr
4 wk after
African marigold
Tagetes erecta
24 Mar – 7 Apr
6-8 wk
19 May
8 wk after
Black-eyed Susan
Rudbeckia hirta
28 Feb – 14 Mar
6-8 wk
25 Apr
5 wk after
4 May
6 wk after
Woodland sage
Salvia nemorosa
22 Jan – 5 Feb
8-10 wk
2 Apr
1 wk after
19 Apr
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
10 Mar – 7 Apr
6-10 wk
19 May
8 wk after
California goldenpoppy
Eschscholzia californica
18 Mar
1 wk before
Painted tongue
Salpiglossis sinuata
10 – 24 Mar
8-10 wk
19 May
8 wk after
Water forget-me-not
Myosotis scorpioides
7 – 21 Jan
6-8 wk
4 Mar
3 wk before
6 Apr
2 wk after
Current date Soon Date passed