Ask a Question forum: applying dormant oil to roses

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N. Ohio (Zone 5b)
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Tisha
Sep 21, 2017 8:42 AM CST
When and how often should dormant oil be applied to roses?
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Sep 21, 2017 10:13 AM CST
You should only use the dormant spray when the roses are truly dormant (late winter or early spring). You should also keep the ground under your roses free of debris and mulch - a lot of diseases and insects winter over in what's under your roses.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Sep 21, 2017 10:39 AM CST
Tisha - I would guess that it depends on what you're trying to accomplish with dormant oil. Dormant oil is traditionally a heavier oil used over winter to smother insects on plants. There is a lighter horticultural oil that can be used in the warmer months to control pests and doesn't result in the phytotoxicity that heavier oils can cause in warmer months.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
N. Ohio (Zone 5b)
Bookworm The WITWIT Badge Moon Gardener Million Pollinator Garden Challenge Native Plants and Wildflowers Roses
Vermiculture Frogs and Toads Birds Lover of wildlife (Raccoon badge)
Tisha
Sep 21, 2017 11:00 AM CST
Daisy,
Thank-you for your help.
I`ve been looking for the post that said how many times -the schedule- for application. Thanksgiving, Christmas, and Easter. Does that sound like the correct schedule? How can I find out? I am reading past post, still haven`t found it yet.
N. Ohio (Zone 5b)
Bookworm The WITWIT Badge Moon Gardener Million Pollinator Garden Challenge Native Plants and Wildflowers Roses
Vermiculture Frogs and Toads Birds Lover of wildlife (Raccoon badge)
Tisha
Sep 21, 2017 11:17 AM CST
Cindy,
Toxicity? Great. Don`t really want to go to `toxicity`. The insects I`m concerned about are VERY tiny and attack the buds.
I can live with blackspot, aphids, JB`s, ect. Bud destruction is disappointing. Don`t know how to reconcile to no blossoms.
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Sep 21, 2017 11:56 AM CST
Can you post a picture of the insects, or do they look like this?

https://www.google.ca/search?q...:
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Sep 21, 2017 12:34 PM CST
Tisha - Generally, heavy dormant oils applied in hot weather can cause browning or burning of the leaves. You would apply dormant oil to leafless stems and trunks.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Sep 21, 2017 2:01 PM CST
The spraying schedule was Thanksgiving, Christmas and Valentine's Day - it was also for fruit trees, not roses.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org

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