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Rel. frost
Last spring frost (0°C) 30 Mar Normal year · 20 years of data
Frost-free season 235 days 30 Mar – 20 Nov

Vegetables

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