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Rel. frost
Last spring frost (0°C) 1 Apr Normal year · 20 years of data
Frost-free season 236 days 1 Apr – 23 Nov

Vegetables

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