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Rel. frost
Last spring frost (0°C) 27 Mar Normal year · 20 years of data
Frost-free season 240 days 27 Mar – 22 Nov

Vegetables

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