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Rel. frost
Last spring frost (0°C) 6 May Normal year · 20 years of data
Frost-free season 160 days 6 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)
18 Mar – 1 Apr
19 Jun
5-7 wk
6 May
24 Jul
0 wk
30 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
25 Mar – 8 Apr
1 Jul
4-6 wk
6 May
29 Jul
0 wk
30 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
10 Mar – 7 Apr
16 Apr
8-12 wk
2 Jun
11 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
18 Mar – 1 Apr
14 Jun
5-7 wk
6 May
19 Jul
0 wk
23 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
19 – 26 May
10 Jun
3-4 wk
16 Jun
1 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 May
11 Jun
4-5 wk
16 Jun
9 Jul
6 wk after
16 Jun
29 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
29 May – 5 Jun
3 Jun
3-4 wk
26 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
11 Feb – 11 Mar
4 Apr
8-12 wk
6 May
30 May
0 wk
19 May
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
30 Apr
19 Jun
1 wk before
30 Apr
9 Jun
1 wk before
Maize
Zea mays
5 – 12 May
31 May
3-4 wk
2 Jun
21 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
8 – 15 Apr
8 Jul
3-4 wk
6 May
29 Jul
0 wk
19 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
6 May
9 Jul
0 wk
23 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
18 Mar – 1 Apr
14 Jun
5-7 wk
6 May
19 Jul
0 wk
23 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
30 Mar – 13 Apr
11 Jun
4-6 wk
11 May
9 Jul
1 wk after
11 May
29 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
18 Mar – 1 Apr
24 Jun
5-7 wk
6 May
29 Jul
0 wk
30 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
19 – 26 May
26 Jun
3-4 wk
16 Jun
17 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
8 – 15 Apr
21 Jun
3-4 wk
6 May
12 Jul
0 wk
19 May
2 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
25 Mar – 8 Apr
26 Jun
4-6 wk
6 May
24 Jul
0 wk
Lettuce
Lactuca sativa
8 – 15 Apr
13 Jul
3-4 wk
6 May
3 Aug
0 wk
30 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
25 Mar – 8 Apr
26 Jun
4-6 wk
6 May
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
26 Mar – 9 Apr
5 Jun
2-4 wk
23 Apr
19 Jun
2 wk before
23 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
30 Apr
19 Jun
1 wk before
30 Apr
9 Jun
1 wk before
Spinach
Spinacia oleracea
8 – 15 Apr
28 Jul
3-4 wk
6 May
18 Aug
0 wk
16 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
7 – 21 Jun
4-6 wk
19 Jul
11 wk after
Garden tomato
Solanum lycopersicum
7 – 21 Apr
10 May
6-8 wk
2 Jun
21 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
5 – 19 May
28 Jun
2-4 wk
2 Jun
12 Jul
4 wk after
16 Jun
2 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
25 Mar – 8 Apr
26 Jun
4-6 wk
6 May
24 Jul
0 wk
Garden pea
Pisum sativum
8 – 15 Apr
28 Jun
3-4 wk
6 May
19 Jul
0 wk
30 Apr
9 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
5 – 19 May
4 Jun
4-6 wk
16 Jun
2 Jul
6 wk after
Lemon balm
Melissa officinalis
25 Feb – 11 Mar
24 May
8-10 wk
6 May
19 Jul
0 wk
1 Jun
9 Jul
4 wk after
Dill
Anethum graveolens
30 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
11 – 25 Mar
7 Jun
6-8 wk
6 May
19 Jul
0 wk
30 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
11 Feb – 11 Mar
24 May
8-12 wk
6 May
19 Jul
0 wk
1 Jun
9 Jul
4 wk after
Coriander
Coriandrum sativum
6 May
18 Aug
0 wk
19 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
25 Feb – 11 Mar
9 May
8-10 wk
6 May
4 Jul
0 wk
Common thyme
Thymus vulgaris
25 Feb – 11 Mar
14 May
8-10 wk
6 May
9 Jul
0 wk
Oregano
Origanum vulgare
11 – 25 Mar
28 May
6-8 wk
6 May
9 Jul
0 wk
1 Jun
29 Jun
4 wk after
Parsley
Petroselinum crispum
11 – 25 Mar
28 May
6-8 wk
6 May
9 Jul
0 wk
30 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
28 Jan – 25 Feb
10 Apr
10-14 wk
6 May
19 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
19 – 26 May
11 Jun
3-4 wk
16 Jun
2 Jul
6 wk after
Cornflower
Centaurea cyanus
6 May
19 Jul
0 wk
30 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
24 Mar – 7 Apr
14 May
8-10 wk
2 Jun
9 Jul
4 wk after
Sweet William
Dianthus barbatus
11 – 25 Mar
6-8 wk
6 May
0 wk
11 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
28 May
6-8 wk
2 Jun
9 Jul
4 wk after
19 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
2 – 16 Apr
28 May
6-8 wk
28 May
9 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
6 Apr – 4 May
11 Jun
4-8 wk
1 Jun
9 Jul
4 wk after
1 Jun
29 Jun
4 wk after
Foxglove
Digitalis purpurea
25 Feb – 11 Mar
8-10 wk
6 May
0 wk
19 May
2 wk after
Busy lizzie
Impatiens walleriana
24 Mar – 21 Apr
4 Jul
8-12 wk
16 Jun
29 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
7 Jun
6-8 wk
2 Jun
19 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Fleece
5 – 19 May
5 May
4-6 wk
16 Jun
6 wk after
Chinese lantern
Physalis alkekengi
25 Feb – 11 Mar
24 Apr
8-10 wk
6 May
19 Jun
0 wk
Love in a mist
Nigella damascena
6 May
4 Jul
0 wk
30 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
7 – 21 Apr
18 May
6-8 wk
2 Jun
29 Jun
4 wk after
19 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
11 Feb – 11 Mar
24 Apr
8-12 wk
6 May
19 Jun
0 wk
Cardoon
Cynara cardunculus
10 Mar – 7 Apr
25 Mar
8-12 wk
2 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
24 Mar – 21 Apr
27 Apr
8-12 wk
16 Jun
22 Jun
6 wk after
Globe amaranth
Gomphrena globosa
21 Apr – 5 May
11 May
6-8 wk
16 Jun
22 Jun
6 wk after
Corn poppy
Papaver rhoeas
6 May
19 Jul
0 wk
30 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
11 Feb – 11 Mar
14 May
8-12 wk
6 May
9 Jul
0 wk
11 May
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
7 – 21 Apr
24 May
8-10 wk
16 Jun
19 Jul
6 wk after
Sweet pea
Lathyrus odoratus
11 Mar – 1 Apr
4 Jun
5-8 wk
6 May
9 Jul
0 wk
Stock
Matthiola incana
11 – 25 Mar
7 Jun
6-8 wk
6 May
19 Jul
0 wk
19 May
9 Jul
2 wk after
Wormwood
Artemisia absinthium
11 – 25 Mar
8 May
6-8 wk
6 May
19 Jun
0 wk
19 May
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
5 – 19 May
20 May
4-6 wk
16 Jun
17 Jun
6 wk after
Garden pansy
Viola × wittrockiana
25 Feb – 11 Mar
24 May
8-10 wk
6 May
19 Jul
0 wk
11 May
9 Jul
1 wk after
Petunia
Petunia
10 Mar – 7 Apr
14 May
8-12 wk
2 Jun
9 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
11 – 25 Mar
8 May
6-8 wk
6 May
19 Jun
0 wk
16 Jun
6 wk after
Common zinnia
Zinnia elegans
21 Apr – 5 May
16 Jun
4-6 wk
2 Jun
14 Jul
4 wk after
Common morning glory
Ipomoea purpurea
12 – 26 May
11 Jun
3-5 wk
16 Jun
2 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
11 Jun
4-6 wk
2 Jun
9 Jul
4 wk after
16 Jun
29 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
11 Apr – 9 May
27 May
8-12 wk
4 Jul
22 Jul
8 wk after
Bee balm
Monarda didyma
11 Feb – 11 Mar
24 Apr
8-12 wk
6 May
19 Jun
0 wk
1 Jun
9 Jun
4 wk after
Yarrow
Achillea millefolium
11 – 25 Mar
8 Apr
6-8 wk
6 May
20 May
0 wk
19 May
2 wk after
Safflower
Carthamus tinctorius
6 May
19 Jun
0 wk
30 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
11 – 25 Mar
28 May
6-8 wk
6 May
9 Jul
0 wk
21 Mar
29 Jun
7 wk before
Bishop's flower
Ammi majus
25 Mar – 8 Apr
11 Jun
4-6 wk
6 May
9 Jul
0 wk
19 May
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
24 Mar – 7 Apr
5 Apr
10-12 wk
16 Jun
6 wk after
Sunflower
Helianthus annuus
5 – 12 May
18 Jun
3-4 wk
2 Jun
9 Jul
4 wk after
1 Jun
29 Jun
4 wk after
China aster
Callistephus chinensis
7 – 21 Apr
7 Jun
6-8 wk
2 Jun
19 Jul
4 wk after
16 Jun
9 Jul
6 wk after
Annual phlox
Phlox drummondii
29 Mar – 12 Apr
7 Jun
6-8 wk
24 May
19 Jul
3 wk after
16 Jun
9 Jul
6 wk after
Hollyhock
Alcea rosea
11 – 25 Mar
6-8 wk
6 May
0 wk
19 May
2 wk after
Alpine delphinium
Delphinium elatum
11 Feb – 11 Mar
24 Apr
8-12 wk
6 May
19 Jun
0 wk
1 Jun
9 Jun
4 wk after
African marigold
Tagetes erecta
7 – 21 Apr
7 Jun
6-8 wk
2 Jun
19 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
11 – 25 Mar
28 May
6-8 wk
6 May
9 Jul
0 wk
16 Jun
29 Jun
6 wk after
Wood sage
Salvia nemorosa
25 Feb – 11 Mar
14 Apr
8-10 wk
6 May
9 Jun
0 wk
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
7 Apr – 5 May
21 May
6-10 wk
16 Jun
2 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
6 May
19 Jul
0 wk
30 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
14 May
8-10 wk
2 Jun
9 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
11 – 25 Mar
8 May
6-8 wk
6 May
19 Jun
0 wk
19 May
9 Jun
2 wk after