All the leaves are gone on all my knockout roses! What should I spray?
by
S. H
+11
The leaves on my knockout rose are lacey or completely gone! Help!
10 answers
-
Sounds like it could be black spot. It is a really common fungus that turns the leaves yellow with round black spots on them. they fall off really quickly. Black spot will not kill your rose, but it will defoliate it and if severe enough, damage any blooms. try a product by Bayer - 2 in 1 systematic rose care. Also, when wattering the plant, try not to splash any water on the leaves, as this can accelerate formation of black spot.
Luis
on Jun 09, 2014
- See 2 previous
-
When the leaves are gone, spray the stems.
Donna Shipley
on Jun 09, 2014
-
It was found that Knockouts got a virus or fungus just like other roses do, so their popularity tanked this year. Spray w/ fungal spray and hope it comes back.
Vicki K
on Jun 09, 2014
-
NEEM Oil
Doris Hare
on Jun 09, 2014
-
NEEM not only treats black spot but insects also.
Doris Hare
on Jun 09, 2014
-
It is both a fungicide and insectide.
Doris Hare
on Jun 09, 2014
-
Out of curiosity-how long has it been planted? and did you buy it distressed (on the markdown rack)?
The Garden Frog with C Renee
on Jun 09, 2014
-
It sounds like rose sawfly damage. Neem may work, or an insectide containing pyrethrin.
Douglas Hunt
on Jun 10, 2014
-
I agree with Doris Hare! NEEM is a 3-in-1 organic. It is a fungicide, miticide and insecticide so will work on any of the three culprits, since she isn't sure what it is. It would be my first choice and it will not hurt any beneficial insects. Good luck :)
Leslie Long
on Jun 10, 2014
-
I need to get some NEEM oil! I have mealy bugs and ants on my crepe myrtle. I was going to use alcohol and water in a spray.
Vicki K
on Jun 10, 2014
Sign Up to Answer
Related Discussions
Suggested Project Book
