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Rel. frost
Last spring frost (0°C) 4 May Frost 3 of 4 years · 20 years of data
Frost-free season 145 days 4 May – 26 Sep
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)
Greenhouse
22 Mar – 5 Apr
5-7 wk
10 May
1 wk after
5 Apr
4 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
4-6 wk
18 May
2 wk after
27 Apr
1 wk before
Chili pepper
Capsicum annuum
Season too short
16 Mar – 13 Apr
8-12 wk
8 Jun
5 wk after
Kale
Brassica oleracea (Curly Kale-gruppen)
19 Feb – 5 Mar
5-7 wk
9 Apr
4 wk before
22 Apr
2 wk before
Cucumber
Cucumis sativus
Season too short
11 – 18 May
3-4 wk
8 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
Season too short
4 – 11 May
4-5 wk
8 Jun
5 wk after
14 May
1 wk after
Butter bean
Phaseolus lunatus
Greenhouse
12 – 19 May
3-4 wk
9 Jun
5 wk after
Onion
Allium cepa (Cepa-gruppen)
9 Feb – 9 Mar
8-12 wk
4 May
Vid frost
14 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
14 May
1 wk after
14 May
1 wk after
Sweetcorn
Zea mays
Fleece
22 – 29 May
3-4 wk
19 Jun
7 wk after
Chard
Beta vulgaris (Flavescens-gruppen)
5 – 12 May
3-4 wk
2 Jun
4 wk after
14 May
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 Apr
2 wk before
Cavolo nero
Brassica oleracea (Palm Kale-gruppen)
19 Feb – 5 Mar
5-7 wk
9 Apr
4 wk before
22 Apr
2 wk before
Potato
Solanum tuberosum
28 Mar – 11 Apr
4-6 wk
9 May
1 wk after
9 May
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Feb – 5 Mar
5-7 wk
9 Apr
4 wk before
27 Apr
1 wk before
Pumpkin
Cucurbita pepo
Season too short
11 – 18 May
3-4 wk
8 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
5 – 12 May
3-4 wk
2 Jun
4 wk after
14 May
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
4-6 wk
18 May
2 wk after
Lettuce
Lactuca sativa
30 Mar – 6 Apr
3-4 wk
27 Apr
1 wk before
27 Apr
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
16 – 30 Mar
4-6 wk
27 Apr
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Mar – 8 Apr
2-4 wk
22 Apr
2 wk before
22 Apr
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
27 Apr
1 wk before
27 Apr
1 wk before
Spinach
Spinacia oleracea
22 – 29 Mar
3-4 wk
19 Apr
2 wk before
16 Apr
3 wk before
Sweet potato
Ipomoea batatas
31 May – 14 Jun
4-6 wk
12 Jul
10 wk after
Tomato
Solanum lycopersicum
Greenhouse
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
Tomatillo
Physalis ixocarpa
French bean
Phaseolus vulgaris
Greenhouse
28 Apr – 12 May
2-4 wk
26 May
3 wk after
14 May
1 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
4-6 wk
18 May
2 wk after
Pea
Pisum sativum
22 – 29 Mar
3-4 wk
19 Apr
2 wk before
27 Apr
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
8 – 22 May
4-6 wk
19 Jun
7 wk after
Lemon balm
Melissa officinalis
23 Feb – 9 Mar
8-10 wk
4 May
Vid frost
25 May
3 wk after
Dill
Anethum graveolens
27 Apr
1 wk before
Chives
Allium schoenoprasum
12 – 26 Feb
6-8 wk
9 Apr
4 wk before
27 Apr
1 wk before
Spearmint
Mentha spicata
25 Jan – 22 Feb
8-12 wk
19 Apr
2 wk before
25 May
3 wk after
Coriander
Coriandrum sativum
14 May
1 wk after
Sage
Salvia officinalis
Fleece
9 – 23 Mar
8-10 wk
18 May
2 wk after
Thyme
Thymus vulgaris
9 – 23 Mar
8-10 wk
18 May
2 wk after
Oregano
Origanum vulgare
15 – 29 Mar
6-8 wk
10 May
1 wk after
25 May
3 wk after
Parsley
Petroselinum crispum
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
27 Apr
1 wk before
Rosemary
Salvia rosmarinus
Greenhouse
1 Feb – 1 Mar
10-14 wk
10 May
1 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
23 – 30 May
3-4 wk
20 Jun
7 wk after
Cornflower
Centaurea cyanus
19 Apr
2 wk before
27 Apr
1 wk before
Statice
Limonium sinuatum
Greenhouse
17 – 31 Mar
8-10 wk
26 May
3 wk after
Sweet William
Dianthus barbatus
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
9 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
1 Jun
4 wk after
Dahlia
Dahlia × pinnata
Greenhouse
23 Mar – 6 Apr
6-8 wk
18 May
2 wk after
Dahlia (tubers)
Dahlia × pinnata
30 Mar – 27 Apr
4-8 wk
25 May
3 wk after
25 May
3 wk after
Foxglove
Digitalis purpurea
8 – 22 Feb
8-10 wk
19 Apr
2 wk before
14 May
1 wk after
Busy lizzie
Impatiens walleriana
Greenhouse
16 Mar – 13 Apr
8-12 wk
8 Jun
5 wk after
Creeping zinnia
Sanvitalia procumbens
Greenhouse
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
9 – 23 May
4-6 wk
20 Jun
7 wk after
Chinese lantern
Physalis alkekengi
Greenhouse
1 – 15 Mar
8-10 wk
10 May
1 wk after
Love in a mist
Nigella damascena
27 Apr
1 wk before
Strawflower
Xerochrysum bracteatum
Greenhouse
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
1 Jun
4 wk after
Tall verbena
Verbena bonariensis
Greenhouse
15 Feb – 15 Mar
8-12 wk
10 May
1 wk after
Cardoon
Cynara cardunculus
Season too short
3 – 31 Mar
8-12 wk
26 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
16 Mar – 13 Apr
8-12 wk
8 Jun
5 wk after
Globe amaranth
Gomphrena globosa
Season too short
13 – 27 Apr
6-8 wk
8 Jun
5 wk after
Corn poppy
Papaver rhoeas
27 Apr
1 wk before
Snapdragon
Antirrhinum majus
2 Feb – 2 Mar
8-12 wk
27 Apr
1 wk before
9 May
1 wk after
Flossflower
Ageratum houstonianum
Season too short
30 Mar – 13 Apr
8-10 wk
8 Jun
5 wk after
Sweet pea
Lathyrus odoratus
22 Feb – 15 Mar
5-8 wk
19 Apr
2 wk before
Stock
Matthiola incana
2 – 16 Mar
6-8 wk
27 Apr
1 wk before
14 May
1 wk after
Wormwood
Artemisia absinthium
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
14 May
1 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
27 Apr – 11 May
4-6 wk
8 Jun
5 wk after
Pansy
Viola × wittrockiana
29 Jan – 12 Feb
8-10 wk
9 Apr
4 wk before
9 May
1 wk after
Petunia
Petunia
Greenhouse
3 – 31 Mar
8-12 wk
26 May
3 wk after
Scabious
Scabiosa atropurpurea
Greenhouse
15 – 29 Mar
6-8 wk
10 May
1 wk after
14 May
1 wk after
Zinnia
Zinnia elegans
Greenhouse
14 – 28 Apr
4-6 wk
26 May
3 wk after
Common morning glory
Ipomoea purpurea
Season too short
4 – 18 May
3-5 wk
8 Jun
5 wk after
Cosmos
Cosmos bipinnatus
Greenhouse
14 – 28 Apr
4-6 wk
26 May
3 wk after
14 May
1 wk after
Scarlet milkweed
Asclepias curassavica
Season too short
28 Mar – 25 Apr
8-12 wk
20 Jun
7 wk after
Bee balm
Monarda didyma
9 Feb – 9 Mar
8-12 wk
4 May
Vid frost
25 May
3 wk after
Yarrow
Achillea millefolium
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
14 May
1 wk after
Safflower
Carthamus tinctorius
19 Apr
2 wk before
27 Apr
1 wk before
Iceland poppy
Papaver nudicaule
12 – 26 Feb
6-8 wk
9 Apr
4 wk before
22 Apr
2 wk before
Bishop's flower
Ammi majus
2 – 16 Apr
4-6 wk
14 May
1 wk after
14 May
1 wk after
Drumsticks
Pycnosorus globosus
Season too short
16 – 30 Mar
10-12 wk
8 Jun
5 wk after
Sunflower
Helianthus annuus
Greenhouse
28 Apr – 5 May
3-4 wk
26 May
3 wk after
3 May
China aster
Callistephus chinensis
Season too short
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
14 May
1 wk after
Annual phlox
Phlox drummondii
Fleece
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
25 May
3 wk after
Hollyhock
Alcea rosea
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
14 May
1 wk after
Delphinium
Delphinium elatum
23 Feb – 23 Mar
8-12 wk
18 May
2 wk after
25 May
3 wk after
African marigold
Tagetes erecta
Greenhouse
31 Mar – 14 Apr
6-8 wk
26 May
3 wk after
Black-eyed Susan
Rudbeckia hirta
Fleece
23 Mar – 6 Apr
6-8 wk
18 May
2 wk after
25 May
3 wk after
Woodland sage
Salvia nemorosa
1 – 15 Mar
8-10 wk
10 May
1 wk after
25 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Season too short
30 Mar – 27 Apr
6-10 wk
8 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
27 Apr
1 wk before
Painted tongue
Salpiglossis sinuata
Greenhouse
17 – 31 Mar
8-10 wk
26 May
3 wk after
Water forget-me-not
Myosotis scorpioides
22 Feb – 8 Mar
6-8 wk
19 Apr
2 wk before
14 May
1 wk after
Current date Soon Date passed