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Rel. frost
Last spring frost (0°C) 7 May Normal year · 20 years of data
Frost-free season 150 days 7 May – 4 Oct

Vegetables

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