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Rel. frost
Last spring frost (0°C) 28 Apr Normal year · 20 years of data
Frost-free season 180 days 28 Apr – 25 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)
10 – 24 Mar
18 Jun
5-7 wk
28 Apr
23 Jul
0 wk
21 Apr
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
17 – 31 Mar
30 Jun
4-6 wk
28 Apr
28 Jul
0 wk
21 Apr
18 Jul
1 wk before
Chili pepper
Capsicum annuum
11 Mar – 8 Apr
3 Apr
8-12 wk
3 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Mar
13 Jun
5-7 wk
28 Apr
18 Jul
0 wk
16 Apr
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
6 – 13 May
15 Jun
3-4 wk
3 Jun
6 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
10 Jun
4-5 wk
3 Jun
8 Jul
5 wk after
3 Jun
28 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
27 May – 3 Jun
28 May
3-4 wk
24 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
3 Feb – 3 Mar
3 Apr
8-12 wk
28 Apr
29 May
0 wk
8 May
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
21 Apr
18 Jun
1 wk before
21 Apr
8 Jun
1 wk before
Maize
Zea mays
19 – 26 Apr
5 Jun
3-4 wk
17 May
26 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 Apr
7 Jul
3-4 wk
4 May
28 Jul
1 wk after
8 May
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 Apr
8 Jul
0 wk
16 Apr
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Mar
13 Jun
5-7 wk
28 Apr
18 Jul
0 wk
16 Apr
8 Jul
2 wk before
Potato
Solanum tuberosum
22 Mar – 5 Apr
10 Jun
4-6 wk
3 May
8 Jul
1 wk after
3 May
28 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Mar
23 Jun
5-7 wk
28 Apr
28 Jul
0 wk
21 Apr
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
6 – 13 May
2 Jul
3-4 wk
3 Jun
23 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 Apr
30 Jun
3-4 wk
4 May
21 Jul
1 wk after
8 May
11 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 – 31 Mar
25 Jun
4-6 wk
28 Apr
23 Jul
0 wk
Lettuce
Lactuca sativa
31 Mar – 7 Apr
12 Jul
3-4 wk
28 Apr
2 Aug
0 wk
21 Apr
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
17 – 31 Mar
25 Jun
4-6 wk
28 Apr
23 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
19 Mar – 2 Apr
4 Jun
2-4 wk
16 Apr
18 Jun
2 wk before
16 Apr
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
21 Apr
18 Jun
1 wk before
21 Apr
8 Jun
1 wk before
Spinach
Spinacia oleracea
31 Mar – 7 Apr
27 Jul
3-4 wk
28 Apr
17 Aug
0 wk
10 Apr
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
25 May – 8 Jun
4-6 wk
6 Jul
10 wk after
Garden tomato
Solanum lycopersicum
22 Mar – 5 Apr
15 May
6-8 wk
17 May
26 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
19 Apr – 3 May
4 Jul
2-4 wk
17 May
18 Jul
3 wk after
3 Jun
8 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 – 31 Mar
25 Jun
4-6 wk
28 Apr
23 Jul
0 wk
Garden pea
Pisum sativum
31 Mar – 7 Apr
27 Jun
3-4 wk
28 Apr
18 Jul
0 wk
21 Apr
8 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
22 Apr – 6 May
10 Jun
4-6 wk
3 Jun
8 Jul
5 wk after
Lemon balm
Melissa officinalis
17 Feb – 3 Mar
23 May
8-10 wk
28 Apr
18 Jul
0 wk
19 May
8 Jul
3 wk after
Dill
Anethum graveolens
21 Apr
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
3 – 17 Mar
6 Jun
6-8 wk
28 Apr
18 Jul
0 wk
21 Apr
8 Jul
1 wk before
Spearmint
Mentha spicata
3 Feb – 3 Mar
23 May
8-12 wk
28 Apr
18 Jul
0 wk
19 May
8 Jul
3 wk after
Coriander
Coriandrum sativum
28 Apr
17 Aug
0 wk
8 May
7 Aug
1 wk after
Garden sage
Salvia officinalis
23 Feb – 9 Mar
8 May
8-10 wk
4 May
3 Jul
1 wk after
Common thyme
Thymus vulgaris
17 Feb – 3 Mar
13 May
8-10 wk
28 Apr
8 Jul
0 wk
Oregano
Origanum vulgare
3 – 17 Mar
27 May
6-8 wk
28 Apr
8 Jul
0 wk
19 May
28 Jun
3 wk after
Parsley
Petroselinum crispum
3 – 17 Mar
27 May
6-8 wk
28 Apr
8 Jul
0 wk
21 Apr
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
26 Jan – 23 Feb
9 Apr
10-14 wk
4 May
18 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
6 – 13 May
17 Jun
3-4 wk
3 Jun
8 Jul
5 wk after
Cornflower
Centaurea cyanus
28 Apr
18 Jul
0 wk
21 Apr
8 Jul
1 wk before
Statice
Limonium sinuatum
8 – 22 Mar
13 May
8-10 wk
17 May
8 Jul
3 wk after
Sweet William
Dianthus barbatus
3 – 17 Mar
6-8 wk
28 Apr
0 wk
3 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
22 Mar – 5 Apr
27 May
6-8 wk
17 May
8 Jul
3 wk after
6 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
17 – 31 Mar
27 May
6-8 wk
12 May
8 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
24 Mar – 21 Apr
10 Jun
4-8 wk
19 May
8 Jul
3 wk after
19 May
28 Jun
3 wk after
Foxglove
Digitalis purpurea
17 Feb – 3 Mar
8-10 wk
28 Apr
0 wk
8 May
1 wk after
Busy lizzie
Impatiens walleriana
11 Mar – 8 Apr
5 Jul
8-12 wk
3 Jun
30 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
22 Mar – 5 Apr
6 Jun
6-8 wk
17 May
18 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
22 Apr – 6 May
11 May
4-6 wk
3 Jun
8 Jun
5 wk after
Chinese lantern
Physalis alkekengi
23 Feb – 9 Mar
23 Apr
8-10 wk
4 May
18 Jun
1 wk after
Love in a mist
Nigella damascena
28 Apr
3 Jul
0 wk
21 Apr
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
22 Mar – 5 Apr
17 May
6-8 wk
17 May
28 Jun
3 wk after
6 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
9 Feb – 9 Mar
23 Apr
8-12 wk
4 May
18 Jun
1 wk after
Cardoon
Cynara cardunculus
22 Feb – 22 Mar
24 Mar
8-12 wk
17 May
19 May
3 wk after
Regal-foxtail
Ptilotus nobilis
11 Mar – 8 Apr
3 May
8-12 wk
3 Jun
28 Jun
5 wk after
Globe amaranth
Gomphrena globosa
8 – 22 Apr
17 May
6-8 wk
3 Jun
28 Jun
5 wk after
Corn poppy
Papaver rhoeas
28 Apr
18 Jul
0 wk
21 Apr
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
3 Feb – 3 Mar
13 May
8-12 wk
28 Apr
8 Jul
0 wk
3 May
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
25 Mar – 8 Apr
23 May
8-10 wk
3 Jun
18 Jul
5 wk after
Sweet pea
Lathyrus odoratus
3 – 24 Mar
3 Jun
5-8 wk
28 Apr
8 Jul
0 wk
Stock
Matthiola incana
3 – 17 Mar
6 Jun
6-8 wk
28 Apr
18 Jul
0 wk
8 May
8 Jul
1 wk after
Wormwood
Artemisia absinthium
3 – 17 Mar
7 May
6-8 wk
28 Apr
18 Jun
0 wk
8 May
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
22 Apr – 6 May
26 May
4-6 wk
3 Jun
23 Jun
5 wk after
Garden pansy
Viola × wittrockiana
17 Feb – 3 Mar
23 May
8-10 wk
28 Apr
18 Jul
0 wk
3 May
8 Jul
1 wk after
Petunia
Petunia
22 Feb – 22 Mar
13 May
8-12 wk
17 May
8 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
9 – 23 Mar
7 May
6-8 wk
4 May
18 Jun
1 wk after
3 Jun
8 Jun
5 wk after
Common zinnia
Zinnia elegans
5 – 19 Apr
17 Jun
4-6 wk
17 May
15 Jul
3 wk after
Common morning glory
Ipomoea purpurea
29 Apr – 13 May
17 Jun
3-5 wk
3 Jun
8 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
5 – 19 Apr
10 Jun
4-6 wk
17 May
8 Jul
3 wk after
3 Jun
28 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
23 Mar – 20 Apr
2 Jun
8-12 wk
15 Jun
28 Jul
7 wk after
Bee balm
Monarda didyma
3 Feb – 3 Mar
23 Apr
8-12 wk
28 Apr
18 Jun
0 wk
19 May
8 Jun
3 wk after
Yarrow
Achillea millefolium
3 – 17 Mar
7 Apr
6-8 wk
28 Apr
19 May
0 wk
8 May
9 May
1 wk after
Safflower
Carthamus tinctorius
28 Apr
18 Jun
0 wk
21 Apr
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
3 – 17 Mar
27 May
6-8 wk
28 Apr
8 Jul
0 wk
20 Mar
28 Jun
6 wk before
Bishop's flower
Ammi majus
17 – 31 Mar
10 Jun
4-6 wk
28 Apr
8 Jul
0 wk
8 May
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
11 – 25 Mar
6 Apr
10-12 wk
3 Jun
15 Jun
5 wk after
Sunflower
Helianthus annuus
19 – 26 Apr
17 Jun
3-4 wk
17 May
8 Jul
3 wk after
19 May
28 Jun
3 wk after
China aster
Callistephus chinensis
22 Mar – 5 Apr
6 Jun
6-8 wk
17 May
18 Jul
3 wk after
3 Jun
8 Jul
5 wk after
Annual phlox
Phlox drummondii
14 – 28 Mar
6 Jun
6-8 wk
9 May
18 Jul
2 wk after
3 Jun
8 Jul
5 wk after
Hollyhock
Alcea rosea
3 – 17 Mar
6-8 wk
28 Apr
0 wk
8 May
1 wk after
Alpine delphinium
Delphinium elatum
3 Feb – 3 Mar
23 Apr
8-12 wk
28 Apr
18 Jun
0 wk
19 May
8 Jun
3 wk after
African marigold
Tagetes erecta
22 Mar – 5 Apr
6 Jun
6-8 wk
17 May
18 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
9 – 23 Mar
27 May
6-8 wk
4 May
8 Jul
1 wk after
3 Jun
28 Jun
5 wk after
Wood sage
Salvia nemorosa
17 Feb – 3 Mar
13 Apr
8-10 wk
28 Apr
8 Jun
0 wk
19 May
29 May
3 wk after
Black-eyed susan vine
Thunbergia alata
25 Mar – 22 Apr
27 May
6-10 wk
3 Jun
8 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
28 Apr
18 Jul
0 wk
21 Apr
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
8 – 22 Mar
13 May
8-10 wk
17 May
8 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
3 – 17 Mar
7 May
6-8 wk
28 Apr
18 Jun
0 wk
8 May
8 Jun
1 wk after