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Rel. frost
Last spring frost (0°C) 23 Apr Normal year · 20 years of data
Frost-free season 191 days 23 Apr – 31 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)
5 – 19 Mar
22 Jun
5-7 wk
23 Apr
27 Jul
0 wk
17 Apr
17 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
12 – 26 Mar
4 Jul
4-6 wk
23 Apr
1 Aug
0 wk
17 Apr
22 Jul
1 wk before
Chili pepper
Capsicum annuum
11 Mar – 8 Apr
7 Apr
8-12 wk
3 Jun
6 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
5 – 19 Mar
17 Jun
5-7 wk
23 Apr
22 Jul
0 wk
10 Apr
12 Jul
2 wk before
Garden cucumber
Cucumis sativus
6 – 13 May
16 Jun
3-4 wk
3 Jun
7 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
14 Jun
4-5 wk
3 Jun
12 Jul
6 wk after
3 Jun
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
16 – 23 May
11 Jun
3-4 wk
13 Jun
2 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
29 Jan – 26 Feb
7 Apr
8-12 wk
23 Apr
2 Jun
0 wk
6 May
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 Apr
22 Jun
1 wk before
17 Apr
12 Jun
1 wk before
Maize
Zea mays
22 – 29 Apr
6 Jun
3-4 wk
20 May
27 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Mar – 2 Apr
11 Jul
3-4 wk
23 Apr
1 Aug
0 wk
6 May
22 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 Apr
12 Jul
0 wk
10 Apr
2 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
5 – 19 Mar
17 Jun
5-7 wk
23 Apr
22 Jul
0 wk
10 Apr
12 Jul
2 wk before
Potato
Solanum tuberosum
17 – 31 Mar
14 Jun
4-6 wk
28 Apr
12 Jul
1 wk after
28 Apr
2 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
5 – 19 Mar
27 Jun
5-7 wk
23 Apr
1 Aug
0 wk
17 Apr
22 Jul
1 wk before
Pumpkin
Cucurbita pepo
6 – 13 May
9 Jul
3-4 wk
3 Jun
30 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Mar – 2 Apr
30 Jun
3-4 wk
23 Apr
21 Jul
0 wk
6 May
11 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
12 – 26 Mar
29 Jun
4-6 wk
23 Apr
27 Jul
0 wk
Lettuce
Lactuca sativa
26 Mar – 2 Apr
16 Jul
3-4 wk
23 Apr
6 Aug
0 wk
17 Apr
27 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
12 – 26 Mar
29 Jun
4-6 wk
23 Apr
27 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
13 – 27 Mar
8 Jun
2-4 wk
10 Apr
22 Jun
2 wk before
10 Apr
12 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 Apr
22 Jun
1 wk before
17 Apr
12 Jun
1 wk before
Spinach
Spinacia oleracea
26 Mar – 2 Apr
31 Jul
3-4 wk
23 Apr
21 Aug
0 wk
3 Apr
11 Aug
3 wk before
Sweet potato
Ipomoea batatas
25 May – 8 Jun
4-6 wk
6 Jul
11 wk after
Garden tomato
Solanum lycopersicum
25 Mar – 8 Apr
16 May
6-8 wk
20 May
27 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
22 Apr – 6 May
11 Jul
2-4 wk
20 May
25 Jul
4 wk after
3 Jun
15 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
12 – 26 Mar
29 Jun
4-6 wk
23 Apr
27 Jul
0 wk
Garden pea
Pisum sativum
26 Mar – 2 Apr
1 Jul
3-4 wk
23 Apr
22 Jul
0 wk
17 Apr
12 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
17 Jun
4-6 wk
3 Jun
15 Jul
6 wk after
Lemon balm
Melissa officinalis
12 – 26 Feb
27 May
8-10 wk
23 Apr
22 Jul
0 wk
19 May
12 Jul
4 wk after
Dill
Anethum graveolens
17 Apr
1 Aug
1 wk before
Wild chives
Allium schoenoprasum
26 Feb – 12 Mar
10 Jun
6-8 wk
23 Apr
22 Jul
0 wk
17 Apr
12 Jul
1 wk before
Spearmint
Mentha spicata
29 Jan – 26 Feb
27 May
8-12 wk
23 Apr
22 Jul
0 wk
19 May
12 Jul
4 wk after
Coriander
Coriandrum sativum
23 Apr
21 Aug
0 wk
6 May
11 Aug
2 wk after
Garden sage
Salvia officinalis
12 – 26 Feb
12 May
8-10 wk
23 Apr
7 Jul
0 wk
Common thyme
Thymus vulgaris
12 – 26 Feb
17 May
8-10 wk
23 Apr
12 Jul
0 wk
Oregano
Origanum vulgare
26 Feb – 12 Mar
31 May
6-8 wk
23 Apr
12 Jul
0 wk
19 May
2 Jul
4 wk after
Parsley
Petroselinum crispum
26 Feb – 12 Mar
31 May
6-8 wk
23 Apr
12 Jul
0 wk
17 Apr
2 Jul
1 wk before
Rosemary
Salvia rosmarinus
15 Jan – 12 Feb
13 Apr
10-14 wk
23 Apr
22 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
6 – 13 May
24 Jun
3-4 wk
3 Jun
15 Jul
6 wk after
Cornflower
Centaurea cyanus
23 Apr
22 Jul
0 wk
17 Apr
12 Jul
1 wk before
Statice
Limonium sinuatum
11 – 25 Mar
17 May
8-10 wk
20 May
12 Jul
4 wk after
Sweet William
Dianthus barbatus
26 Feb – 12 Mar
6-8 wk
23 Apr
0 wk
28 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
25 Mar – 8 Apr
31 May
6-8 wk
20 May
12 Jul
4 wk after
6 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
20 Mar – 3 Apr
31 May
6-8 wk
15 May
12 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
24 Mar – 21 Apr
14 Jun
4-8 wk
19 May
12 Jul
4 wk after
19 May
2 Jul
4 wk after
Foxglove
Digitalis purpurea
12 – 26 Feb
8-10 wk
23 Apr
0 wk
6 May
2 wk after
Busy lizzie
Impatiens walleriana
11 Mar – 8 Apr
12 Jul
8-12 wk
3 Jun
6 Sep
6 wk after
Creeping zinnia
Sanvitalia procumbens
25 Mar – 8 Apr
10 Jun
6-8 wk
20 May
22 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Fleece
22 Apr – 6 May
18 May
4-6 wk
3 Jun
15 Jun
6 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Feb
27 Apr
8-10 wk
23 Apr
22 Jun
0 wk
Love in a mist
Nigella damascena
23 Apr
7 Jul
0 wk
17 Apr
27 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
4 wk after
6 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
29 Jan – 26 Feb
27 Apr
8-12 wk
23 Apr
22 Jun
0 wk
Cardoon
Cynara cardunculus
25 Feb – 25 Mar
28 Mar
8-12 wk
20 May
23 May
4 wk after
Regal-foxtail
Ptilotus nobilis
11 Mar – 8 Apr
10 May
8-12 wk
3 Jun
5 Jul
6 wk after
Globe amaranth
Gomphrena globosa
8 – 22 Apr
24 May
6-8 wk
3 Jun
5 Jul
6 wk after
Corn poppy
Papaver rhoeas
23 Apr
22 Jul
0 wk
17 Apr
12 Jul
1 wk before
Snapdragon
Antirrhinum majus
29 Jan – 26 Feb
17 May
8-12 wk
23 Apr
12 Jul
0 wk
28 Apr
2 Jul
1 wk after
Flossflower
Ageratum houstonianum
25 Mar – 8 Apr
27 May
8-10 wk
3 Jun
22 Jul
6 wk after
Sweet pea
Lathyrus odoratus
26 Feb – 19 Mar
7 Jun
5-8 wk
23 Apr
12 Jul
0 wk
Stock
Matthiola incana
26 Feb – 12 Mar
10 Jun
6-8 wk
23 Apr
22 Jul
0 wk
6 May
12 Jul
2 wk after
Wormwood
Artemisia absinthium
26 Feb – 12 Mar
11 May
6-8 wk
23 Apr
22 Jun
0 wk
6 May
12 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
22 Apr – 6 May
2 Jun
4-6 wk
3 Jun
30 Jun
6 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Feb
27 May
8-10 wk
23 Apr
22 Jul
0 wk
28 Apr
12 Jul
1 wk after
Petunia
Petunia
25 Feb – 25 Mar
17 May
8-12 wk
20 May
12 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
26 Feb – 12 Mar
11 May
6-8 wk
23 Apr
22 Jun
0 wk
3 Jun
12 Jun
6 wk after
Common zinnia
Zinnia elegans
8 – 22 Apr
24 Jun
4-6 wk
20 May
22 Jul
4 wk after
Common morning glory
Ipomoea purpurea
29 Apr – 13 May
24 Jun
3-5 wk
3 Jun
15 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
8 – 22 Apr
14 Jun
4-6 wk
20 May
12 Jul
4 wk after
3 Jun
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
29 Mar – 26 Apr
9 Jun
8-12 wk
21 Jun
4 Aug
8 wk after
Bee balm
Monarda didyma
29 Jan – 26 Feb
27 Apr
8-12 wk
23 Apr
22 Jun
0 wk
19 May
12 Jun
4 wk after
Yarrow
Achillea millefolium
26 Feb – 12 Mar
11 Apr
6-8 wk
23 Apr
23 May
0 wk
6 May
13 May
2 wk after
Safflower
Carthamus tinctorius
23 Apr
22 Jun
0 wk
17 Apr
12 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
26 Feb – 12 Mar
31 May
6-8 wk
23 Apr
12 Jul
0 wk
8 Mar
2 Jul
7 wk before
Bishop's flower
Ammi majus
12 – 26 Mar
14 Jun
4-6 wk
23 Apr
12 Jul
0 wk
6 May
2 Jul
2 wk after
Drumsticks
Pycnosorus globosus
11 – 25 Mar
13 Apr
10-12 wk
3 Jun
22 Jun
6 wk after
Sunflower
Helianthus annuus
22 – 29 Apr
21 Jun
3-4 wk
20 May
12 Jul
4 wk after
19 May
2 Jul
4 wk after
China aster
Callistephus chinensis
25 Mar – 8 Apr
10 Jun
6-8 wk
20 May
22 Jul
4 wk after
3 Jun
12 Jul
6 wk after
Annual phlox
Phlox drummondii
16 – 30 Mar
10 Jun
6-8 wk
11 May
22 Jul
3 wk after
3 Jun
12 Jul
6 wk after
Hollyhock
Alcea rosea
26 Feb – 12 Mar
6-8 wk
23 Apr
0 wk
6 May
2 wk after
Alpine delphinium
Delphinium elatum
29 Jan – 26 Feb
27 Apr
8-12 wk
23 Apr
22 Jun
0 wk
19 May
12 Jun
4 wk after
African marigold
Tagetes erecta
25 Mar – 8 Apr
10 Jun
6-8 wk
20 May
22 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
26 Feb – 12 Mar
31 May
6-8 wk
23 Apr
12 Jul
0 wk
3 Jun
2 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Feb
17 Apr
8-10 wk
23 Apr
12 Jun
0 wk
19 May
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
25 Mar – 22 Apr
3 Jun
6-10 wk
3 Jun
15 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
23 Apr
22 Jul
0 wk
17 Apr
12 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
11 – 25 Mar
17 May
8-10 wk
20 May
12 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
26 Feb – 12 Mar
11 May
6-8 wk
23 Apr
22 Jun
0 wk
6 May
12 Jun
2 wk after