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Re: [SHADEGARDENS] Horticultural oil

Hi all,
Just a quick note on horticultural oil. The new oils have been refined to the
point that they are now called growing season oil or just horticultural oil
instead of dorment oil.
I apply this oil on all newly leafed out plants in spring to protect the
plants from powdery mildew and black spot. The oil is highly refined and
allows the plant to breathe while putting a protective coating to stop the
pathogen that starts powderymildew. I do this twice in a season , once just
after the leaves emerge on most plants and later toward mid summer. I spray
this on my lilacs as well as my perennial bed and it keeps mildew off
phlox,lilac and even monarda . I do not use this on my evergreens but I use
the oil to kill any scale that may be on my euonymus.
This works for me so you all might give it a try as long as the temp. is under
80 degrees.
Happy Gardening from Janet, 20 mi. west of NYC in zone 6
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