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Rel. frost
Last spring frost (0°C) 31 Mar Normal year · 20 years of data
Frost-free season 235 days 31 Mar – 21 Nov

Vegetables

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