Unhappy hibiscus

Our 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]

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