Hibiscus Plant Not Flowering

I Have 2 Hibiscus Plants One Of Which Is In Its 3rd Year And Each Year They Produce Lot A Of Buds But None Of The Buds Ever Seem To Open Poorly Flowering Hibiscus Problem Is Probably Fertilizer Chicago Tribune The Reason For Not Flowering At Hibiscus The Other Plants Had Leaves That Were Much Broader And Were Covered With Blooms