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Rel. frost
Last spring frost (0°C) 15 Apr Normal year · 20 years of data
Frost-free season 201 days 15 Apr – 2 Nov

Vegetables

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