What's your question? Ask

Star Jasmine Plants

Q.Trachelospermum Jasminoides

Zone SO31 5BT | L Neve added on March 7, 2022 | Answered

My Trachelospermum jasminoides leaves are covered in a thick black sooty layer. This happened last winter and I guess it is because the spot where it is growing doesn’t much much sun in the winter months. Is there any non-chemical spray I can use or should I cut it right back now and then replant it? It has been in preent position for about 4-5 years and is a vigorous plant, so I assume that the black “soot” isn’t going to kill it but it is very unsightly. It does however flower well in the summer on the new growth..

A.Answers to this queston: Add Answer
Certified GKH Gardening Expert
Answered on March 7, 2022

This was likely brought about by an insect infestation, at one time. Aphids will cause this, usually.

What you describe for winter conditions will make things worse, for sure, though.

Unfortunately, cutting them back will not solve the issue. Whether you choose organic or synthetic chemicals, chemicals will be needed, however.


Was this answer useful?

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Star Jasmine Plants
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert