Ask the Plant Doctor! How to achieve optimal soil pH and deal with whiteflies

By DR CHRISTOPHER TEH

Ideally, aim for soil pH 5.5-6.5, but this may not be practical for large gardens. Photos: 123rf.com

Do you have a question about plants or how to maintain your garden? Send your questions to the Plant Doctor!

Email your questions to lifestyle@thestar.com.my with "Plant Doctor" in the subject field. Questions may be edited for brevity and clarity.

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