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Rel. frost
Last spring frost (0°C) 29 Apr Normal year · 20 years of data
Frost-free season 173 days 29 Apr – 19 Oct

Vegetables

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

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
23 Apr – 7 May
30 May
4-6 wk
4 Jun
27 Jun
5 wk after
Lemon balm
Melissa officinalis
18 Feb – 4 Mar
16 May
8-10 wk
29 Apr
11 Jul
0 wk
24 May
1 Jul
4 wk after
Dill
Anethum graveolens
30 Apr
21 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
4 – 18 Mar
30 May
6-8 wk
29 Apr
11 Jul
0 wk
20 Apr
1 Jul
1 wk before
Spearmint
Mentha spicata
4 Feb – 4 Mar
16 May
8-12 wk
29 Apr
11 Jul
0 wk
24 May
1 Jul
4 wk after
Coriander
Coriandrum sativum
29 Apr
10 Aug
0 wk
12 May
31 Jul
2 wk after
Garden sage
Salvia officinalis
25 Feb – 11 Mar
1 May
8-10 wk
6 May
26 Jun
1 wk after
Common thyme
Thymus vulgaris
18 Feb – 4 Mar
6 May
8-10 wk
29 Apr
1 Jul
0 wk
Oregano
Origanum vulgare
4 – 18 Mar
20 May
6-8 wk
29 Apr
1 Jul
0 wk
24 May
21 Jun
4 wk after
Parsley
Petroselinum crispum
4 – 18 Mar
20 May
6-8 wk
29 Apr
1 Jul
0 wk
30 Apr
21 Jun
0 wk
Rosemary
Salvia rosmarinus
28 Jan – 25 Feb
2 Apr
10-14 wk
6 May
11 Jun
1 wk after

Annual flowers

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