About three weeks ago we brought in our purple glory. For a short while it thrived in our atrium then it dropped about 90% of its leaves and now what leaves remain are covered in waxy beads. Do you have any suggestions on what we can do to help this shrub out?
Thank you for your question.
Prior to moving your Purple Glory inside, it is recommended that you move it to a shady spot to prepare it for the less intense indoor light. Also spraying the foliage and branches with water or diluted insecticidal soap prior to bringing it indoors is recommended Once inside, the plant will naturally lose some leaves as it becomes accustomed to being inside. The plant should have at least 5 hours of bright light every day, ideally near a south or west facing window Room temperature should be between 60 to 70 degrees F or 15 to 21 C. Mist the plant often and turn occasionally in order to keep it growing straight. High humidity will keep the plant’s foliage in good condition. Water your plant with room temperature water when the top 1 to 2 inches of soil feel dry.
The waxy deposits on the leaf surface is a physiological disorder known as oedema caused by overwatering or high humidity. This disorder develops when roots take up water faster than it can be used by the plant or transpired through the leaves. Water pressure builds up in the cells of the leaves causing them to burst resulting in white or tan blisters of corky tissue forming on the leaf surface. As the condition worsens, leaves may turn yellow, droop, and fall off. Cutting back on water without letting the plant dry out should alleviate the problem.
The Missouri Botanical garden has an excellent article and photos on this disorder: Oedema