I grow many hibiscus plants on the windward side of Oahu and have great success with them. However, I have one hedge of 11 plants and the last two on one end are pitiful. They have been in the ground 3 years and are 6 feet tall and did well the first 18 months. A year ago they lost most of their leaves and those few that do grow back are small and sparse, and the flowers are quite small. I've increased and decreased water, fertilizer, ironite and epsom salts, all to no avail. Any suggestions on what else to try?

Mahalo,

Mike