Last year my new hibiscus bloomed through June but in July and August the buds never opened. They either dropped off or yellowed. In September the hibiscus bloomed beautifully. What happened in July and August? I kept plant watered throughout summer.
Certified GKH Gardening Expert
It is probably similar to the common problem of the blossoms falling off. Follow the directions in this article: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-flowers-hibiscus-blossoms-falling-off-plant.htm