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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comOur hibiscus were good last year but are not doing so well this spring, leaves yellow and sparse. Feeding and spraying with pyrethrum do not seem to make any change.
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1 Comment To "Unhappy hibiscus"
#1 Comment By Alisma On 10/07/2016 @ 5:26 pm
This can be caused by excessive heat, drought, or overwatering. It sounds like nutrient deficiency and pests are not the cause, but the others listed here are possibilities:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm [1]