Butterfly Bushes
Q.

buddleia bush leaves turning yellow but still flowering

Zone Suffolk | Anonymous added on August 13, 2016 | Answered

I wondered if I need Ericaceous compost. I have two other buddleias with no problems though.

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on August 14, 2016

Yellowing leaves generally indicates a watering issue, to much or to little.
Insects also can become an issue that may cause yellowing of leaves when the plant is stressed.

Adjust water as needed and inspect the plant for signs of insects or disease.
Neem Oil is a good treatment.

Here are some links for you.

https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-care.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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