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Rel. frost
Last spring frost (0°C) 5 May Normal year · 20 years of data
Frost-free season 161 days 5 May – 13 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)
17 – 31 Mar
21 Jun
5-7 wk
5 May
26 Jul
0 wk
29 Apr
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
24 Mar – 7 Apr
3 Jul
4-6 wk
5 May
31 Jul
0 wk
29 Apr
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
9 Mar – 6 Apr
19 Apr
8-12 wk
1 Jun
14 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
17 – 31 Mar
16 Jun
5-7 wk
5 May
21 Jul
0 wk
22 Apr
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
18 – 25 May
13 Jun
3-4 wk
15 Jun
4 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
11 – 18 May
13 Jun
4-5 wk
15 Jun
11 Jul
6 wk after
15 Jun
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
28 May – 4 Jun
5 Jun
3-4 wk
25 Jun
26 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
10 Feb – 10 Mar
6 Apr
8-12 wk
5 May
1 Jun
0 wk
18 May
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
29 Apr
21 Jun
1 wk before
29 Apr
11 Jun
1 wk before
Maize
Zea mays
4 – 11 May
3 Jun
3-4 wk
1 Jun
24 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
7 – 14 Apr
10 Jul
3-4 wk
5 May
31 Jul
0 wk
18 May
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
5 May
11 Jul
0 wk
22 Apr
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
17 – 31 Mar
16 Jun
5-7 wk
5 May
21 Jul
0 wk
22 Apr
11 Jul
2 wk before
Potato
Solanum tuberosum
29 Mar – 12 Apr
13 Jun
4-6 wk
10 May
11 Jul
1 wk after
10 May
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
17 – 31 Mar
26 Jun
5-7 wk
5 May
31 Jul
0 wk
29 Apr
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
18 – 25 May
4 Jul
3-4 wk
15 Jun
25 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
7 – 14 Apr
29 Jun
3-4 wk
5 May
20 Jul
0 wk
18 May
10 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
24 Mar – 7 Apr
28 Jun
4-6 wk
5 May
26 Jul
0 wk
Lettuce
Lactuca sativa
7 – 14 Apr
15 Jul
3-4 wk
5 May
5 Aug
0 wk
29 Apr
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
24 Mar – 7 Apr
28 Jun
4-6 wk
5 May
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
25 Mar – 8 Apr
7 Jun
2-4 wk
22 Apr
21 Jun
2 wk before
22 Apr
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
29 Apr
21 Jun
1 wk before
29 Apr
11 Jun
1 wk before
Spinach
Spinacia oleracea
7 – 14 Apr
30 Jul
3-4 wk
5 May
20 Aug
0 wk
15 Apr
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
6 – 20 Jun
4-6 wk
18 Jul
11 wk after
Garden tomato
Solanum lycopersicum
6 – 20 Apr
13 May
6-8 wk
1 Jun
24 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
4 – 18 May
6 Jul
2-4 wk
1 Jun
20 Jul
4 wk after
15 Jun
10 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
24 Mar – 7 Apr
28 Jun
4-6 wk
5 May
26 Jul
0 wk
Garden pea
Pisum sativum
7 – 14 Apr
30 Jun
3-4 wk
5 May
21 Jul
0 wk
29 Apr
11 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
4 – 18 May
12 Jun
4-6 wk
15 Jun
10 Jul
6 wk after
Lemon balm
Melissa officinalis
24 Feb – 10 Mar
26 May
8-10 wk
5 May
21 Jul
0 wk
31 May
11 Jul
4 wk after
Dill
Anethum graveolens
29 Apr
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
10 – 24 Mar
9 Jun
6-8 wk
5 May
21 Jul
0 wk
29 Apr
11 Jul
1 wk before
Spearmint
Mentha spicata
10 Feb – 10 Mar
26 May
8-12 wk
5 May
21 Jul
0 wk
31 May
11 Jul
4 wk after
Coriander
Coriandrum sativum
5 May
20 Aug
0 wk
18 May
10 Aug
2 wk after
Garden sage
Salvia officinalis
24 Feb – 10 Mar
11 May
8-10 wk
5 May
6 Jul
0 wk
Common thyme
Thymus vulgaris
24 Feb – 10 Mar
16 May
8-10 wk
5 May
11 Jul
0 wk
Oregano
Origanum vulgare
10 – 24 Mar
30 May
6-8 wk
5 May
11 Jul
0 wk
31 May
1 Jul
4 wk after
Parsley
Petroselinum crispum
10 – 24 Mar
30 May
6-8 wk
5 May
11 Jul
0 wk
29 Apr
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
27 Jan – 24 Feb
12 Apr
10-14 wk
5 May
21 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
18 – 25 May
19 Jun
3-4 wk
15 Jun
10 Jul
6 wk after
Cornflower
Centaurea cyanus
5 May
21 Jul
0 wk
29 Apr
11 Jul
1 wk before
Statice
Limonium sinuatum
23 Mar – 6 Apr
15 May
8-10 wk
1 Jun
10 Jul
4 wk after
Sweet William
Dianthus barbatus
10 – 24 Mar
6-8 wk
5 May
0 wk
10 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 Apr
29 May
6-8 wk
1 Jun
10 Jul
4 wk after
18 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
1 – 15 Apr
30 May
6-8 wk
27 May
11 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
5 Apr – 3 May
13 Jun
4-8 wk
31 May
11 Jul
4 wk after
31 May
1 Jul
4 wk after
Foxglove
Digitalis purpurea
24 Feb – 10 Mar
8-10 wk
5 May
0 wk
18 May
2 wk after
Busy lizzie
Impatiens walleriana
23 Mar – 20 Apr
6 Jul
8-12 wk
15 Jun
31 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 Apr
8 Jun
6-8 wk
1 Jun
20 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Fleece
4 – 18 May
13 May
4-6 wk
15 Jun
6 wk after
Chinese lantern
Physalis alkekengi
24 Feb – 10 Mar
26 Apr
8-10 wk
5 May
21 Jun
0 wk
Love in a mist
Nigella damascena
5 May
6 Jul
0 wk
29 Apr
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
6 – 20 Apr
19 May
6-8 wk
1 Jun
30 Jun
4 wk after
18 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
10 Feb – 10 Mar
26 Apr
8-12 wk
5 May
21 Jun
0 wk
Cardoon
Cynara cardunculus
9 Mar – 6 Apr
27 Mar
8-12 wk
1 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
23 Mar – 20 Apr
5 May
8-12 wk
15 Jun
30 Jun
6 wk after
Globe amaranth
Gomphrena globosa
20 Apr – 4 May
19 May
6-8 wk
15 Jun
30 Jun
6 wk after
Corn poppy
Papaver rhoeas
5 May
21 Jul
0 wk
29 Apr
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
10 Feb – 10 Mar
16 May
8-12 wk
5 May
11 Jul
0 wk
10 May
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
6 – 20 Apr
25 May
8-10 wk
15 Jun
20 Jul
6 wk after
Sweet pea
Lathyrus odoratus
10 – 31 Mar
6 Jun
5-8 wk
5 May
11 Jul
0 wk
Stock
Matthiola incana
10 – 24 Mar
9 Jun
6-8 wk
5 May
21 Jul
0 wk
18 May
11 Jul
2 wk after
Wormwood
Artemisia absinthium
10 – 24 Mar
10 May
6-8 wk
5 May
21 Jun
0 wk
18 May
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
4 – 18 May
28 May
4-6 wk
15 Jun
25 Jun
6 wk after
Garden pansy
Viola × wittrockiana
24 Feb – 10 Mar
26 May
8-10 wk
5 May
21 Jul
0 wk
10 May
11 Jul
1 wk after
Petunia
Petunia
9 Mar – 6 Apr
15 May
8-12 wk
1 Jun
10 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
10 – 24 Mar
10 May
6-8 wk
5 May
21 Jun
0 wk
15 Jun
6 wk after
Common zinnia
Zinnia elegans
20 Apr – 4 May
18 Jun
4-6 wk
1 Jun
16 Jul
4 wk after
Common morning glory
Ipomoea purpurea
11 – 25 May
19 Jun
3-5 wk
15 Jun
10 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
20 Apr – 4 May
13 Jun
4-6 wk
1 Jun
11 Jul
4 wk after
15 Jun
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
10 Apr – 8 May
4 Jun
8-12 wk
3 Jul
30 Jul
8 wk after
Bee balm
Monarda didyma
10 Feb – 10 Mar
26 Apr
8-12 wk
5 May
21 Jun
0 wk
31 May
11 Jun
4 wk after
Yarrow
Achillea millefolium
10 – 24 Mar
10 Apr
6-8 wk
5 May
22 May
0 wk
18 May
2 wk after
Safflower
Carthamus tinctorius
5 May
21 Jun
0 wk
29 Apr
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
10 – 24 Mar
30 May
6-8 wk
5 May
11 Jul
0 wk
20 Mar
1 Jul
7 wk before
Bishop's flower
Ammi majus
24 Mar – 7 Apr
13 Jun
4-6 wk
5 May
11 Jul
0 wk
18 May
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
23 Mar – 6 Apr
7 Apr
10-12 wk
15 Jun
16 Jun
6 wk after
Sunflower
Helianthus annuus
4 – 11 May
20 Jun
3-4 wk
1 Jun
11 Jul
4 wk after
31 May
1 Jul
4 wk after
China aster
Callistephus chinensis
6 – 20 Apr
9 Jun
6-8 wk
1 Jun
21 Jul
4 wk after
15 Jun
11 Jul
6 wk after
Annual phlox
Phlox drummondii
28 Mar – 11 Apr
8 Jun
6-8 wk
23 May
20 Jul
3 wk after
15 Jun
10 Jul
6 wk after
Hollyhock
Alcea rosea
10 – 24 Mar
6-8 wk
5 May
0 wk
18 May
2 wk after
Alpine delphinium
Delphinium elatum
10 Feb – 10 Mar
26 Apr
8-12 wk
5 May
21 Jun
0 wk
31 May
11 Jun
4 wk after
African marigold
Tagetes erecta
6 – 20 Apr
8 Jun
6-8 wk
1 Jun
20 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
10 – 24 Mar
30 May
6-8 wk
5 May
11 Jul
0 wk
15 Jun
1 Jul
6 wk after
Wood sage
Salvia nemorosa
24 Feb – 10 Mar
16 Apr
8-10 wk
5 May
11 Jun
0 wk
31 May
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
6 Apr – 4 May
29 May
6-10 wk
15 Jun
10 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
5 May
21 Jul
0 wk
29 Apr
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
23 Mar – 6 Apr
16 May
8-10 wk
1 Jun
11 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
10 – 24 Mar
10 May
6-8 wk
5 May
21 Jun
0 wk
18 May
11 Jun
2 wk after