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Rel. frost
Last spring frost (0°C) 31 Mar Frost 3 of 4 years · 20 years of data
Frost-free season 219 days 31 Mar – 5 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)
Fleece
1 – 15 Mar
5-7 wk
19 Apr
3 wk after
27 Mar
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Mar
4-6 wk
17 Apr
3 wk after
27 Mar
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
12 Feb – 12 Mar
8-12 wk
7 May
5 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
17 – 31 Jan
5-7 wk
7 Mar
3 wk before
23 Mar
Vid frost
Cucumber
Cucumis sativus
Greenhouse
9 – 16 Apr
3-4 wk
7 May
5 wk after
Florence Fennel
Foeniculum vulgare
Greenhouse
2 – 9 Apr
4-5 wk
7 May
5 wk after
21 Apr
3 wk after
Butter bean
Phaseolus lunatus
Season too short
21 – 28 Apr
3-4 wk
19 May
7 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Jan – 3 Feb
8-12 wk
31 Mar
Vid frost
13 Apr
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
13 Apr
3 wk after
Sweetcorn
Zea mays
Season too short
13 – 20 Apr
3-4 wk
11 May
6 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 Apr
3-4 wk
30 Apr
5 wk after
13 Apr
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 Mar
Vid frost
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
17 – 31 Jan
5-7 wk
7 Mar
3 wk before
23 Mar
Vid frost
Potato
Solanum tuberosum
6 – 20 Apr
4-6 wk
18 May
7 wk after
8 Apr
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
17 – 31 Jan
5-7 wk
7 Mar
3 wk before
27 Mar
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
9 – 16 Apr
3-4 wk
7 May
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 Apr
3-4 wk
30 Apr
5 wk after
13 Apr
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Mar
4-6 wk
17 Apr
3 wk after
Lettuce
Lactuca sativa
24 Feb – 3 Mar
3-4 wk
24 Mar
1 wk before
27 Mar
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
10 – 24 Feb
4-6 wk
24 Mar
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 Feb – 2 Mar
2-4 wk
16 Mar
2 wk before
23 Mar
Vid frost
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
27 Mar
1 wk after
Spinach
Spinacia oleracea
16 – 23 Feb
3-4 wk
16 Mar
2 wk before
18 Mar
1 wk before
Sweet potato
Ipomoea batatas
18 Apr – 2 May
4-6 wk
30 May
8 wk after
Tomato
Solanum lycopersicum
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
Fleece
9 – 23 Apr
2-4 wk
7 May
5 wk after
5 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Mar
4-6 wk
17 Apr
3 wk after
Pea
Pisum sativum
16 – 23 Feb
3-4 wk
16 Mar
2 wk before
27 Mar
1 wk after
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
30 Mar – 13 Apr
4-6 wk
11 May
6 wk after
Lemon balm
Melissa officinalis
20 Jan – 3 Feb
8-10 wk
31 Mar
Vid frost
25 Apr
5 wk after
Dill
Anethum graveolens
27 Mar
1 wk after
Chives
Allium schoenoprasum
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
27 Mar
1 wk after
Spearmint
Mentha spicata
22 Dec – 19 Jan
8-12 wk
16 Mar
2 wk before
25 Apr
5 wk after
Coriander
Coriandrum sativum
13 Apr
3 wk after
Sage
Salvia officinalis
19 Feb – 5 Mar
8-10 wk
30 Apr
5 wk after
Thyme
Thymus vulgaris
6 – 20 Feb
8-10 wk
17 Apr
3 wk after
Oregano
Origanum vulgare
9 – 23 Feb
6-8 wk
6 Apr
1 wk after
25 Apr
5 wk after
Parsley
Petroselinum crispum
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
27 Mar
1 wk after
Rosemary
Salvia rosmarinus
22 Jan – 19 Feb
10-14 wk
30 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
Season too short
18 – 25 Apr
3-4 wk
16 May
7 wk after
Cornflower
Centaurea cyanus
16 Mar
2 wk before
27 Mar
1 wk after
Statice
Limonium sinuatum
Fleece
26 Feb – 12 Mar
8-10 wk
7 May
5 wk after
Sweet William
Dianthus barbatus
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
8 Apr
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
29 May
8 wk after
Dahlia
Dahlia × pinnata
Fleece
7 – 21 Mar
6-8 wk
2 May
5 wk after
Dahlia (tubers)
Dahlia × pinnata
Fleece
24 Feb – 24 Mar
4-8 wk
21 Apr
3 wk after
21 Apr
3 wk after
Foxglove
Digitalis purpurea
5 – 19 Jan
8-10 wk
16 Mar
2 wk before
13 Apr
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
21 Feb – 21 Mar
8-12 wk
16 May
7 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
Hyacinth bean
Dolichos lablab
Season too short
4 – 18 Apr
4-6 wk
16 May
7 wk after
Chinese lantern
Physalis alkekengi
19 Feb – 5 Mar
8-10 wk
30 Apr
5 wk after
Love in a mist
Nigella damascena
27 Mar
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
29 May
8 wk after
Tall verbena
Verbena bonariensis
5 Feb – 5 Mar
8-12 wk
30 Apr
5 wk after
Cardoon
Cynara cardunculus
Greenhouse
31 Jan – 28 Feb
8-12 wk
25 Apr
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
12 Feb – 12 Mar
8-12 wk
7 May
5 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
12 – 26 Mar
6-8 wk
7 May
5 wk after
Corn poppy
Papaver rhoeas
27 Mar
1 wk after
Snapdragon
Antirrhinum majus
30 Dec – 27 Jan
8-12 wk
24 Mar
1 wk before
8 Apr
2 wk after
Flossflower
Ageratum houstonianum
Greenhouse
26 Feb – 12 Mar
8-10 wk
7 May
5 wk after
Sweet pea
Lathyrus odoratus
19 Jan – 9 Feb
5-8 wk
16 Mar
2 wk before
Stock
Matthiola incana
27 Jan – 10 Feb
6-8 wk
24 Mar
1 wk before
13 Apr
3 wk after
Wormwood
Artemisia absinthium
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
13 Apr
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
26 Mar – 9 Apr
4-6 wk
7 May
5 wk after
Pansy
Viola × wittrockiana
27 Dec – 10 Jan
8-10 wk
7 Mar
3 wk before
8 Apr
2 wk after
Petunia
Petunia
Fleece
12 Feb – 12 Mar
8-12 wk
7 May
5 wk after
Scabious
Scabiosa atropurpurea
5 – 19 Mar
6-8 wk
30 Apr
5 wk after
11 May
7 wk after
Zinnia
Zinnia elegans
Fleece
26 Mar – 9 Apr
4-6 wk
7 May
5 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
2 – 16 Apr
3-5 wk
7 May
5 wk after
Cosmos
Cosmos bipinnatus
Fleece
26 Mar – 9 Apr
4-6 wk
7 May
5 wk after
5 May
5 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
21 Feb – 21 Mar
8-12 wk
16 May
7 wk after
Bee balm
Monarda didyma
6 Jan – 3 Feb
8-12 wk
31 Mar
Vid frost
25 Apr
5 wk after
Yarrow
Achillea millefolium
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
13 Apr
3 wk after
Safflower
Carthamus tinctorius
16 Mar
2 wk before
27 Mar
1 wk after
Iceland poppy
Papaver nudicaule
10 – 24 Jan
6-8 wk
7 Mar
3 wk before
23 Mar
Vid frost
Bishop's flower
Ammi majus
28 Feb – 14 Mar
4-6 wk
11 Apr
1 wk after
13 Apr
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
12 – 26 Feb
10-12 wk
7 May
5 wk after
Sunflower
Helianthus annuus
Fleece
9 – 16 Apr
3-4 wk
7 May
5 wk after
21 Apr
3 wk after
China aster
Callistephus chinensis
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
5 May
5 wk after
Annual phlox
Phlox drummondii
11 – 25 Mar
6-8 wk
6 May
5 wk after
11 May
7 wk after
Hollyhock
Alcea rosea
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
13 Apr
3 wk after
Delphinium
Delphinium elatum
23 Jan – 20 Feb
8-12 wk
17 Apr
3 wk after
25 Apr
5 wk after
African marigold
Tagetes erecta
Fleece
12 – 26 Mar
6-8 wk
7 May
5 wk after
Black-eyed Susan
Rudbeckia hirta
5 – 19 Mar
6-8 wk
30 Apr
5 wk after
11 May
7 wk after
Woodland sage
Salvia nemorosa
26 Jan – 9 Feb
8-10 wk
6 Apr
1 wk after
25 Apr
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
26 Feb – 26 Mar
6-10 wk
7 May
5 wk after
California goldenpoppy
Eschscholzia californica
27 Mar
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
26 Feb – 12 Mar
8-10 wk
7 May
5 wk after
Water forget-me-not
Myosotis scorpioides
19 Jan – 2 Feb
6-8 wk
16 Mar
2 wk before
13 Apr
3 wk after
Current date Soon Date passed