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Rel. frost
Last spring frost (0°C) 21 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 238 days 21 Mar – 14 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)
2 – 16 Mar
5-7 wk
20 Apr
5 wk after
17 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
24 Feb – 10 Mar
4-6 wk
7 Apr
3 wk after
17 Mar
1 wk before
Chili pepper
Capsicum annuum
21 Feb – 21 Mar
8-12 wk
16 May
10 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
18 – 25 Apr
3-4 wk
16 May
10 wk after
Florence Fennel
Foeniculum vulgare
11 – 18 Apr
4-5 wk
16 May
10 wk after
1 May
6 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Apr
3-4 wk
1 May
6 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Dec – 24 Jan
8-12 wk
21 Mar
Vid frost
3 Apr
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
8 Mar
2 wk before
Sweetcorn
Zea mays
Season too short
26 Mar – 2 Apr
3-4 wk
23 Apr
5 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
23 – 30 Mar
3-4 wk
20 Apr
5 wk after
3 Apr
2 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
Season too short
18 Jan – 1 Feb
4-6 wk
1 Mar
3 wk before
1 Mar
3 wk before
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
18 – 25 Apr
3-4 wk
16 May
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
23 – 30 Mar
3-4 wk
20 Apr
5 wk after
3 Apr
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
24 Feb – 10 Mar
4-6 wk
7 Apr
3 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)
Season too short
6 – 20 Jan
2-4 wk
3 Feb
7 wk before
3 Feb
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
15 Feb
5 wk before
Spinach
Spinacia oleracea
6 – 13 Feb
3-4 wk
6 Mar
3 wk before
8 Mar
3 wk before
Sweet potato
Ipomoea batatas
8 – 22 Apr
4-6 wk
20 May
11 wk after
Tomato
Solanum lycopersicum
13 – 27 Mar
6-8 wk
8 May
8 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
10 – 24 Apr
2-4 wk
8 May
8 wk after
1 May
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
24 Feb – 10 Mar
4-6 wk
7 Apr
3 wk after
Pea
Pisum sativum
6 – 13 Feb
3-4 wk
6 Mar
3 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
Season too short
12 – 26 Mar
4-6 wk
23 Apr
5 wk after
Lemon balm
Melissa officinalis
10 – 24 Jan
8-10 wk
21 Mar
Vid frost
15 Apr
4 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
3 wk before
15 Apr
4 wk after
Coriander
Coriandrum sativum
3 Apr
2 wk after
Sage
Salvia officinalis
9 – 23 Feb
8-10 wk
20 Apr
5 wk after
Thyme
Thymus vulgaris
27 Jan – 10 Feb
8-10 wk
7 Apr
3 wk after
Oregano
Origanum vulgare
30 Jan – 13 Feb
6-8 wk
27 Mar
1 wk after
15 Apr
4 wk after
Parsley
Petroselinum crispum
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
17 Mar
1 wk before
Rosemary
Salvia rosmarinus
12 Jan – 9 Feb
10-14 wk
20 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
29 Apr – 6 May
3-4 wk
27 May
10 wk after
Cornflower
Centaurea cyanus
6 Mar
3 wk before
17 Mar
1 wk before
Statice
Limonium sinuatum
27 Feb – 13 Mar
8-10 wk
8 May
8 wk after
Sweet William
Dianthus barbatus
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
29 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
13 – 27 Mar
6-8 wk
8 May
8 wk after
31 May
11 wk after
Dahlia
Dahlia × pinnata
8 – 22 Mar
6-8 wk
3 May
7 wk after
Dahlia (tubers)
Dahlia × pinnata
Season too short
23 Jan – 20 Feb
4-8 wk
20 Mar
20 Mar
Foxglove
Digitalis purpurea
26 Dec – 9 Jan
8-10 wk
6 Mar
3 wk before
3 Apr
2 wk after
Busy lizzie
Impatiens walleriana
21 Feb – 21 Mar
8-12 wk
16 May
10 wk after
Creeping zinnia
Sanvitalia procumbens
13 – 27 Mar
6-8 wk
8 May
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
4 – 18 Apr
4-6 wk
16 May
8 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Feb
8-10 wk
20 Apr
5 wk after
Love in a mist
Nigella damascena
17 Mar
1 wk before
Strawflower
Xerochrysum bracteatum
13 – 27 Mar
6-8 wk
8 May
8 wk after
31 May
11 wk after
Tall verbena
Verbena bonariensis
26 Jan – 23 Feb
8-12 wk
20 Apr
5 wk after
Cardoon
Cynara cardunculus
Fleece
6 Feb – 6 Mar
8-12 wk
1 May
6 wk after
Regal-foxtail
Ptilotus nobilis
21 Feb – 21 Mar
8-12 wk
16 May
10 wk after
Globe amaranth
Gomphrena globosa
21 Mar – 4 Apr
6-8 wk
16 May
10 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
7 – 21 Mar
8-10 wk
16 May
10 wk after
Sweet pea
Lathyrus odoratus
9 – 30 Jan
5-8 wk
6 Mar
3 wk before
Stock
Matthiola incana
17 – 31 Jan
6-8 wk
14 Mar
1 wk before
3 Apr
2 wk after
Wormwood
Artemisia absinthium
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
3 Apr
2 wk after
Mexican sunflower
Tithonia rotundifolia
4 – 18 Apr
4-6 wk
16 May
10 wk after
Pansy
Viola × wittrockiana
17 – 31 Dec
8-10 wk
25 Feb
4 wk before
29 Mar
1 wk after
Petunia
Petunia
13 Feb – 13 Mar
8-12 wk
8 May
8 wk after
Scabious
Scabiosa atropurpurea
23 Feb – 9 Mar
6-8 wk
20 Apr
5 wk after
1 May
6 wk after
Zinnia
Zinnia elegans
27 Mar – 10 Apr
4-6 wk
8 May
8 wk after
Common morning glory
Ipomoea purpurea
11 – 25 Apr
3-5 wk
16 May
10 wk after
Cosmos
Cosmos bipinnatus
27 Mar – 10 Apr
4-6 wk
8 May
8 wk after
1 May
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
4 Mar – 1 Apr
8-12 wk
27 May
10 wk after
Bee balm
Monarda didyma
27 Dec – 24 Jan
8-12 wk
21 Mar
Vid frost
15 Apr
4 wk after
Yarrow
Achillea millefolium
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
3 Apr
2 wk after
Safflower
Carthamus tinctorius
6 Mar
3 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
2 wk after
3 Apr
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
21 Feb – 7 Mar
10-12 wk
16 May
8 wk after
Sunflower
Helianthus annuus
10 – 17 Apr
3-4 wk
8 May
8 wk after
15 Apr
4 wk after
China aster
Callistephus chinensis
13 – 27 Mar
6-8 wk
8 May
8 wk after
1 May
6 wk after
Annual phlox
Phlox drummondii
1 – 15 Mar
6-8 wk
26 Apr
6 wk after
1 May
6 wk after
Hollyhock
Alcea rosea
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
3 Apr
2 wk after
Delphinium
Delphinium elatum
13 Jan – 10 Feb
8-12 wk
7 Apr
3 wk after
15 Apr
4 wk after
African marigold
Tagetes erecta
13 – 27 Mar
6-8 wk
8 May
8 wk after
Black-eyed Susan
Rudbeckia hirta
23 Feb – 9 Mar
6-8 wk
20 Apr
5 wk after
1 May
6 wk after
Woodland sage
Salvia nemorosa
16 – 30 Jan
8-10 wk
27 Mar
1 wk after
15 Apr
4 wk after
Black-eyed susan vine
Thunbergia alata
7 Mar – 4 Apr
6-10 wk
16 May
10 wk after
California goldenpoppy
Eschscholzia californica
17 Mar
1 wk before
Painted tongue
Salpiglossis sinuata
27 Feb – 13 Mar
8-10 wk
8 May
8 wk after
Water forget-me-not
Myosotis scorpioides
9 – 23 Jan
6-8 wk
6 Mar
3 wk before
3 Apr
2 wk after
Current date Soon Date passed