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Rel. frost
Last spring frost (0°C) 12 Mar Normal year · 20 years of data
Frost-free season 267 days 12 Mar – 4 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)
Season too short
22 Jan – 5 Feb
22 Jun
5-7 wk
12 Mar
27 Jul
0 wk
6 Feb
17 Jul
5 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
Season too short
29 Jan – 12 Feb
4 Jul
4-6 wk
12 Mar
1 Aug
0 wk
6 Feb
22 Jul
5 wk before
Chili pepper
Capsicum annuum
6 Feb – 6 Mar
30 Apr
8-12 wk
1 May
25 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
22 Jan – 5 Feb
17 Jun
5-7 wk
12 Mar
22 Jul
0 wk
25 Jan
12 Jul
7 wk before
Garden cucumber
Cucumis sativus
3 – 10 Apr
6 Jul
3-4 wk
1 May
27 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
27 Mar – 3 Apr
14 Jun
4-5 wk
1 May
12 Jul
7 wk after
22 Apr
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
22 – 29 May
6 Jun
3-4 wk
19 Jun
27 Jun
14 wk after
Onion
Allium cepa (Cepa-gruppen)
18 Dec – 15 Jan
7 Apr
8-12 wk
12 Mar
2 Jun
0 wk
25 Mar
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 Mar
22 Jun
1 wk before
6 Mar
12 Jun
1 wk before
Maize
Zea mays
22 – 29 Mar
26 Jun
3-4 wk
19 Apr
17 Jul
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Feb
11 Jul
3-4 wk
14 Mar
1 Aug
0 wk
25 Mar
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 Mar
12 Jul
0 wk
27 Feb
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
22 Jan – 5 Feb
17 Jun
5-7 wk
12 Mar
22 Jul
0 wk
25 Jan
12 Jul
7 wk before
Potato
Solanum tuberosum
3 – 17 Feb
14 Jun
4-6 wk
17 Mar
12 Jul
1 wk after
17 Mar
2 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Jan – 5 Feb
27 Jun
5-7 wk
12 Mar
1 Aug
0 wk
6 Mar
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
3 – 10 Apr
16 Jul
3-4 wk
1 May
6 Aug
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Feb
11 Jul
3-4 wk
14 Mar
1 Aug
0 wk
25 Mar
22 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
29 Jan – 12 Feb
29 Jun
4-6 wk
12 Mar
27 Jul
0 wk
Lettuce
Lactuca sativa
12 – 19 Feb
16 Jul
3-4 wk
12 Mar
6 Aug
0 wk
6 Mar
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
29 Jan – 12 Feb
29 Jun
4-6 wk
12 Mar
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Jan – 13 Feb
8 Jun
2-4 wk
27 Feb
22 Jun
2 wk before
27 Feb
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
6 Mar
22 Jun
1 wk before
6 Mar
12 Jun
1 wk before
Spinach
Spinacia oleracea
12 – 19 Feb
31 Jul
3-4 wk
12 Mar
21 Aug
0 wk
20 Feb
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
13 – 27 Apr
4-6 wk
25 May
11 wk after
Garden tomato
Solanum lycopersicum
22 Feb – 8 Mar
5 Jun
6-8 wk
19 Apr
17 Jul
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
22 Mar – 5 Apr
18 Jul
2-4 wk
19 Apr
1 Aug
5 wk after
22 Apr
22 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
29 Jan – 12 Feb
29 Jun
4-6 wk
12 Mar
27 Jul
0 wk
Garden pea
Pisum sativum
12 – 19 Feb
1 Jul
3-4 wk
12 Mar
22 Jul
0 wk
6 Mar
12 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
20 Mar – 3 Apr
24 Jun
4-6 wk
1 May
22 Jul
7 wk after
Lemon balm
Melissa officinalis
1 – 15 Jan
27 May
8-10 wk
12 Mar
22 Jul
0 wk
7 Apr
12 Jul
4 wk after
Dill
Anethum graveolens
6 Mar
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
Season too short
15 – 29 Jan
10 Jun
6-8 wk
12 Mar
22 Jul
0 wk
6 Feb
12 Jul
5 wk before
Spearmint
Mentha spicata
Season too short
18 Dec – 15 Jan
27 May
8-12 wk
12 Mar
22 Jul
0 wk
11 Mar
12 Jul
0 wk
Coriander
Coriandrum sativum
12 Mar
21 Aug
0 wk
25 Mar
11 Aug
2 wk after
Garden sage
Salvia officinalis
Season too short
1 – 15 Jan
12 May
8-10 wk
12 Mar
7 Jul
0 wk
Common thyme
Thymus vulgaris
Season too short
1 – 15 Jan
17 May
8-10 wk
12 Mar
12 Jul
0 wk
Oregano
Origanum vulgare
Season too short
15 – 29 Jan
31 May
6-8 wk
12 Mar
12 Jul
0 wk
11 Mar
2 Jul
0 wk
Parsley
Petroselinum crispum
Season too short
15 – 29 Jan
31 May
6-8 wk
12 Mar
12 Jul
0 wk
6 Feb
2 Jul
5 wk before
Rosemary
Salvia rosmarinus
6 Dec – 3 Jan
13 Apr
10-14 wk
14 Mar
22 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
3 – 10 Apr
1 Jul
3-4 wk
1 May
22 Jul
7 wk after
Cornflower
Centaurea cyanus
Season too short
12 Mar
22 Jul
0 wk
6 Feb
12 Jul
5 wk before
Statice
Limonium sinuatum
8 – 22 Feb
17 May
8-10 wk
19 Apr
12 Jul
5 wk after
Sweet William
Dianthus barbatus
15 – 29 Jan
6-8 wk
12 Mar
0 wk
17 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
22 Feb – 8 Mar
31 May
6-8 wk
19 Apr
12 Jul
5 wk after
25 May
2 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
15 Feb – 1 Mar
31 May
6-8 wk
12 Apr
12 Jul
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
10 Feb – 10 Mar
14 Jun
4-8 wk
7 Apr
12 Jul
4 wk after
7 Apr
2 Jul
4 wk after
Foxglove
Digitalis purpurea
1 – 15 Jan
8-10 wk
12 Mar
0 wk
25 Mar
2 wk after
Busy lizzie
Impatiens walleriana
6 Feb – 6 Mar
12 Jul
8-12 wk
1 May
6 Sep
7 wk after
Creeping zinnia
Sanvitalia procumbens
22 Feb – 8 Mar
10 Jun
6-8 wk
19 Apr
22 Jul
5 wk after
Hyacinth bean
Dolichos lablab
9 – 23 Apr
20 May
4-6 wk
21 May
17 Jun
10 wk after
Chinese lantern
Physalis alkekengi
3 – 17 Jan
27 Apr
8-10 wk
14 Mar
22 Jun
0 wk
Love in a mist
Nigella damascena
12 Mar
7 Jul
0 wk
6 Mar
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
22 Feb – 8 Mar
21 May
6-8 wk
19 Apr
2 Jul
5 wk after
25 May
22 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
20 Dec – 17 Jan
27 Apr
8-12 wk
14 Mar
22 Jun
0 wk
Cardoon
Cynara cardunculus
25 Jan – 22 Feb
28 Mar
8-12 wk
19 Apr
23 May
5 wk after
Regal-foxtail
Ptilotus nobilis
6 Feb – 6 Mar
17 May
8-12 wk
1 May
12 Jul
7 wk after
Globe amaranth
Gomphrena globosa
6 – 20 Mar
31 May
6-8 wk
1 May
12 Jul
7 wk after
Corn poppy
Papaver rhoeas
12 Mar
22 Jul
0 wk
6 Mar
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
18 Dec – 15 Jan
17 May
8-12 wk
12 Mar
12 Jul
0 wk
17 Mar
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
20 Feb – 6 Mar
27 May
8-10 wk
1 May
22 Jul
7 wk after
Sweet pea
Lathyrus odoratus
Season too short
15 Jan – 5 Feb
7 Jun
5-8 wk
12 Mar
12 Jul
0 wk
Stock
Matthiola incana
15 – 29 Jan
10 Jun
6-8 wk
12 Mar
22 Jul
0 wk
25 Mar
12 Jul
2 wk after
Wormwood
Artemisia absinthium
Season too short
15 – 29 Jan
11 May
6-8 wk
12 Mar
22 Jun
0 wk
27 Feb
12 Jun
2 wk before
Mexican sunflower
Tithonia rotundifolia
20 Mar – 3 Apr
9 Jun
4-6 wk
1 May
7 Jul
7 wk after
Garden pansy
Viola × wittrockiana
Season too short
1 – 15 Jan
27 May
8-10 wk
12 Mar
22 Jul
0 wk
20 Feb
12 Jul
3 wk before
Petunia
Petunia
25 Jan – 22 Feb
17 May
8-12 wk
19 Apr
12 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
17 – 31 Jan
11 May
6-8 wk
14 Mar
22 Jun
0 wk
22 Apr
12 Jun
6 wk after
Common zinnia
Zinnia elegans
8 – 22 Mar
24 Jun
4-6 wk
19 Apr
22 Jul
5 wk after
Common morning glory
Ipomoea purpurea
27 Mar – 10 Apr
1 Jul
3-5 wk
1 May
22 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
8 – 22 Mar
14 Jun
4-6 wk
19 Apr
12 Jul
5 wk after
22 Apr
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
26 Feb – 26 Mar
16 Jun
8-12 wk
21 May
11 Aug
10 wk after
Bee balm
Monarda didyma
18 Dec – 15 Jan
27 Apr
8-12 wk
12 Mar
22 Jun
0 wk
7 Apr
12 Jun
4 wk after
Yarrow
Achillea millefolium
Season too short
15 – 29 Jan
11 Apr
6-8 wk
12 Mar
23 May
0 wk
27 Feb
13 May
2 wk before
Safflower
Carthamus tinctorius
12 Mar
22 Jun
0 wk
6 Mar
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
15 – 29 Jan
31 May
6-8 wk
12 Mar
12 Jul
0 wk
25 Jan
2 Jul
7 wk before
Bishop's flower
Ammi majus
29 Jan – 12 Feb
14 Jun
4-6 wk
12 Mar
12 Jul
0 wk
25 Mar
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
6 – 20 Feb
13 Apr
10-12 wk
1 May
22 Jun
7 wk after
Sunflower
Helianthus annuus
22 – 29 Mar
21 Jun
3-4 wk
19 Apr
12 Jul
5 wk after
7 Apr
2 Jul
4 wk after
China aster
Callistephus chinensis
22 Feb – 8 Mar
10 Jun
6-8 wk
19 Apr
22 Jul
5 wk after
22 Apr
12 Jul
6 wk after
Annual phlox
Phlox drummondii
8 – 22 Feb
10 Jun
6-8 wk
5 Apr
22 Jul
3 wk after
22 Apr
12 Jul
6 wk after
Hollyhock
Alcea rosea
15 – 29 Jan
6-8 wk
12 Mar
0 wk
25 Mar
2 wk after
Alpine delphinium
Delphinium elatum
18 Dec – 15 Jan
27 Apr
8-12 wk
12 Mar
22 Jun
0 wk
7 Apr
12 Jun
4 wk after
African marigold
Tagetes erecta
22 Feb – 8 Mar
10 Jun
6-8 wk
19 Apr
22 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
17 – 31 Jan
31 May
6-8 wk
14 Mar
12 Jul
0 wk
22 Apr
2 Jul
6 wk after
Wood sage
Salvia nemorosa
1 – 15 Jan
17 Apr
8-10 wk
12 Mar
12 Jun
0 wk
7 Apr
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
20 Feb – 20 Mar
10 Jun
6-10 wk
1 May
22 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
12 Mar
22 Jul
0 wk
6 Mar
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
8 – 22 Feb
17 May
8-10 wk
19 Apr
12 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
15 – 29 Jan
11 May
6-8 wk
12 Mar
22 Jun
0 wk
27 Feb
12 Jun
2 wk before