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Method
Rel. frost
Last spring frost (0°C) 9 Mar Normal year · 20 years of data
Frost-free season 267 days 9 Mar – 1 Dec

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
19 Jan – 2 Feb
20 Jun
5-7 wk
9 Mar
25 Jul
0 wk
3 Mar
15 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
26 Jan – 9 Feb
2 Jul
4-6 wk
9 Mar
30 Jul
0 wk
3 Mar
20 Jul
1 wk before
Chili pepper
Capsicum annuum
3 Feb – 3 Mar
28 Apr
8-12 wk
28 Apr
23 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
19 Jan – 2 Feb
15 Jun
5-7 wk
9 Mar
20 Jul
0 wk
22 Jan
10 Jul
7 wk before
Garden cucumber
Cucumis sativus
31 Mar – 7 Apr
6 Jul
3-4 wk
28 Apr
27 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
24 – 31 Mar
12 Jun
4-5 wk
28 Apr
10 Jul
7 wk after
19 Apr
30 Jun
6 wk after
Butter bean
Phaseolus lunatus
Fleece
30 Apr – 7 May
9 Jun
3-4 wk
28 May
30 Jun
11 wk after
Onion
Allium cepa (Cepa-gruppen)
Season too short
15 Dec – 12 Jan
5 Apr
8-12 wk
9 Mar
31 May
0 wk
24 Feb
21 May
2 wk before
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
3 Feb
20 Jun
5 wk before
3 Feb
10 Jun
5 wk before
Maize
Zea mays
19 – 26 Mar
26 Jun
3-4 wk
16 Apr
17 Jul
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
11 – 18 Feb
9 Jul
3-4 wk
11 Mar
30 Jul
0 wk
22 Mar
20 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
9 Mar
10 Jul
0 wk
24 Feb
30 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
19 Jan – 2 Feb
15 Jun
5-7 wk
9 Mar
20 Jul
0 wk
22 Jan
10 Jul
7 wk before
Potato
Solanum tuberosum
Season too short
6 – 20 Jan
12 Jun
4-6 wk
17 Feb
10 Jul
3 wk before
17 Feb
30 Jun
3 wk before
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Jan – 2 Feb
25 Jun
5-7 wk
9 Mar
30 Jul
0 wk
3 Mar
20 Jul
1 wk before
Pumpkin
Cucurbita pepo
31 Mar – 7 Apr
14 Jul
3-4 wk
28 Apr
4 Aug
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Season too short
9 – 16 Feb
9 Jul
3-4 wk
9 Mar
30 Jul
0 wk
24 Feb
20 Jul
2 wk before
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
26 Jan – 9 Feb
27 Jun
4-6 wk
9 Mar
25 Jul
0 wk
Lettuce
Lactuca sativa
9 – 16 Feb
14 Jul
3-4 wk
9 Mar
4 Aug
0 wk
3 Mar
25 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
26 Jan – 9 Feb
27 Jun
4-6 wk
9 Mar
25 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
25 Dec – 8 Jan
6 Jun
2-4 wk
22 Jan
20 Jun
7 wk before
22 Jan
10 Jun
7 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
3 Feb
20 Jun
5 wk before
3 Feb
10 Jun
5 wk before
Spinach
Spinacia oleracea
9 – 16 Feb
29 Jul
3-4 wk
9 Mar
19 Aug
0 wk
17 Feb
9 Aug
3 wk before
Sweet potato
Ipomoea batatas
10 – 24 Apr
4-6 wk
22 May
11 wk after
Garden tomato
Solanum lycopersicum
19 Feb – 5 Mar
5 Jun
6-8 wk
16 Apr
17 Jul
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
19 Mar – 2 Apr
16 Jul
2-4 wk
16 Apr
30 Jul
5 wk after
19 Apr
20 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
26 Jan – 9 Feb
27 Jun
4-6 wk
9 Mar
25 Jul
0 wk
Garden pea
Pisum sativum
9 – 16 Feb
29 Jun
3-4 wk
9 Mar
20 Jul
0 wk
3 Mar
10 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
17 – 31 Mar
22 Jun
4-6 wk
28 Apr
20 Jul
7 wk after
Lemon balm
Melissa officinalis
29 Dec – 12 Jan
25 May
8-10 wk
9 Mar
20 Jul
0 wk
4 Apr
10 Jul
4 wk after
Dill
Anethum graveolens
3 Mar
30 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
12 – 26 Jan
8 Jun
6-8 wk
9 Mar
20 Jul
0 wk
3 Feb
10 Jul
5 wk before
Spearmint
Mentha spicata
15 Dec – 12 Jan
25 May
8-12 wk
9 Mar
20 Jul
0 wk
4 Apr
10 Jul
4 wk after
Coriander
Coriandrum sativum
9 Mar
19 Aug
0 wk
22 Mar
9 Aug
2 wk after
Garden sage
Salvia officinalis
Season too short
29 Dec – 12 Jan
10 May
8-10 wk
9 Mar
5 Jul
0 wk
Common thyme
Thymus vulgaris
Season too short
29 Dec – 12 Jan
15 May
8-10 wk
9 Mar
10 Jul
0 wk
Oregano
Origanum vulgare
12 – 26 Jan
29 May
6-8 wk
9 Mar
10 Jul
0 wk
4 Apr
30 Jun
4 wk after
Parsley
Petroselinum crispum
12 – 26 Jan
29 May
6-8 wk
9 Mar
10 Jul
0 wk
3 Mar
30 Jun
1 wk before
Rosemary
Salvia rosmarinus
3 – 31 Dec
11 Apr
10-14 wk
11 Mar
20 Jun
0 wk

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
31 Mar – 7 Apr
29 Jun
3-4 wk
28 Apr
20 Jul
7 wk after
Cornflower
Centaurea cyanus
9 Mar
20 Jul
0 wk
3 Mar
10 Jul
1 wk before
Statice
Limonium sinuatum
5 – 19 Feb
15 May
8-10 wk
16 Apr
10 Jul
5 wk after
Sweet William
Dianthus barbatus
12 – 26 Jan
6-8 wk
9 Mar
0 wk
14 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
19 Feb – 5 Mar
29 May
6-8 wk
16 Apr
10 Jul
5 wk after
22 May
30 Jun
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Feb
29 May
6-8 wk
9 Apr
10 Jul
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
11 Jan – 8 Feb
12 Jun
4-8 wk
8 Mar
10 Jul
0 wk
8 Mar
30 Jun
0 wk
Foxglove
Digitalis purpurea
29 Dec – 12 Jan
8-10 wk
9 Mar
0 wk
22 Mar
2 wk after
Busy lizzie
Impatiens walleriana
3 Feb – 3 Mar
10 Jul
8-12 wk
28 Apr
4 Sep
7 wk after
Creeping zinnia
Sanvitalia procumbens
19 Feb – 5 Mar
8 Jun
6-8 wk
16 Apr
20 Jul
5 wk after
Hyacinth bean
Dolichos lablab
6 – 20 Apr
20 May
4-6 wk
18 May
17 Jun
10 wk after
Chinese lantern
Physalis alkekengi
31 Dec – 14 Jan
25 Apr
8-10 wk
11 Mar
20 Jun
0 wk
Love in a mist
Nigella damascena
9 Mar
5 Jul
0 wk
3 Mar
25 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
19 Feb – 5 Mar
19 May
6-8 wk
16 Apr
30 Jun
5 wk after
22 May
20 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
17 Dec – 14 Jan
25 Apr
8-12 wk
11 Mar
20 Jun
0 wk
Cardoon
Cynara cardunculus
22 Jan – 19 Feb
26 Mar
8-12 wk
16 Apr
21 May
5 wk after
Regal-foxtail
Ptilotus nobilis
3 Feb – 3 Mar
15 May
8-12 wk
28 Apr
10 Jul
7 wk after
Globe amaranth
Gomphrena globosa
3 – 17 Mar
29 May
6-8 wk
28 Apr
10 Jul
7 wk after
Corn poppy
Papaver rhoeas
9 Mar
20 Jul
0 wk
3 Mar
10 Jul
1 wk before
Snapdragon
Antirrhinum majus
15 Dec – 12 Jan
15 May
8-12 wk
9 Mar
10 Jul
0 wk
14 Mar
30 Jun
1 wk after
Flossflower
Ageratum houstonianum
17 Feb – 3 Mar
25 May
8-10 wk
28 Apr
20 Jul
7 wk after
Sweet pea
Lathyrus odoratus
12 Jan – 2 Feb
5 Jun
5-8 wk
9 Mar
10 Jul
0 wk
Stock
Matthiola incana
12 – 26 Jan
8 Jun
6-8 wk
9 Mar
20 Jul
0 wk
22 Mar
10 Jul
2 wk after
Wormwood
Artemisia absinthium
Season too short
12 – 26 Jan
9 May
6-8 wk
9 Mar
20 Jun
0 wk
24 Feb
10 Jun
2 wk before
Mexican sunflower
Tithonia rotundifolia
17 – 31 Mar
7 Jun
4-6 wk
28 Apr
5 Jul
7 wk after
Garden pansy
Viola × wittrockiana
Season too short
29 Dec – 12 Jan
25 May
8-10 wk
9 Mar
20 Jul
0 wk
17 Feb
10 Jul
3 wk before
Petunia
Petunia
22 Jan – 19 Feb
15 May
8-12 wk
16 Apr
10 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
14 – 28 Jan
9 May
6-8 wk
11 Mar
20 Jun
0 wk
19 Apr
10 Jun
6 wk after
Common zinnia
Zinnia elegans
5 – 19 Mar
22 Jun
4-6 wk
16 Apr
20 Jul
5 wk after
Common morning glory
Ipomoea purpurea
24 Mar – 7 Apr
29 Jun
3-5 wk
28 Apr
20 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
5 – 19 Mar
12 Jun
4-6 wk
16 Apr
10 Jul
5 wk after
19 Apr
30 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
23 Feb – 23 Mar
14 Jun
8-12 wk
18 May
9 Aug
10 wk after
Bee balm
Monarda didyma
15 Dec – 12 Jan
25 Apr
8-12 wk
9 Mar
20 Jun
0 wk
4 Apr
10 Jun
4 wk after
Yarrow
Achillea millefolium
Season too short
12 – 26 Jan
9 Apr
6-8 wk
9 Mar
21 May
0 wk
24 Feb
11 May
2 wk before
Safflower
Carthamus tinctorius
9 Mar
20 Jun
0 wk
3 Mar
10 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
12 – 26 Jan
29 May
6-8 wk
9 Mar
10 Jul
0 wk
22 Jan
30 Jun
7 wk before
Bishop's flower
Ammi majus
26 Jan – 9 Feb
12 Jun
4-6 wk
9 Mar
10 Jul
0 wk
22 Mar
30 Jun
2 wk after
Drumsticks
Pycnosorus globosus
3 – 17 Feb
11 Apr
10-12 wk
28 Apr
20 Jun
7 wk after
Sunflower
Helianthus annuus
19 – 26 Mar
19 Jun
3-4 wk
16 Apr
10 Jul
5 wk after
4 Apr
30 Jun
4 wk after
China aster
Callistephus chinensis
19 Feb – 5 Mar
8 Jun
6-8 wk
16 Apr
20 Jul
5 wk after
19 Apr
10 Jul
6 wk after
Annual phlox
Phlox drummondii
5 – 19 Feb
8 Jun
6-8 wk
2 Apr
20 Jul
3 wk after
19 Apr
10 Jul
6 wk after
Hollyhock
Alcea rosea
12 – 26 Jan
6-8 wk
9 Mar
0 wk
22 Mar
2 wk after
Alpine delphinium
Delphinium elatum
15 Dec – 12 Jan
25 Apr
8-12 wk
9 Mar
20 Jun
0 wk
4 Apr
10 Jun
4 wk after
African marigold
Tagetes erecta
19 Feb – 5 Mar
8 Jun
6-8 wk
16 Apr
20 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
14 – 28 Jan
29 May
6-8 wk
11 Mar
10 Jul
0 wk
19 Apr
30 Jun
6 wk after
Wood sage
Salvia nemorosa
29 Dec – 12 Jan
15 Apr
8-10 wk
9 Mar
10 Jun
0 wk
4 Apr
31 May
4 wk after
Black-eyed susan vine
Thunbergia alata
17 Feb – 17 Mar
8 Jun
6-10 wk
28 Apr
20 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
9 Mar
20 Jul
0 wk
3 Mar
10 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
5 – 19 Feb
15 May
8-10 wk
16 Apr
10 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
12 – 26 Jan
9 May
6-8 wk
9 Mar
20 Jun
0 wk
24 Feb
10 Jun
2 wk before