Low-maintenance perennials, hibiscus plants add spectacular, tropical-looking flowers and attractive foliage to the sunny garden or landscape. Sometimes called Rose of Sharon plants, hardy hibiscus return year after year and are available in an array of flower colors. They usually bloom in mid to late summer and attract butterflies. Because many varieties perform well in moist areas, these sun-loving perennials can be planted along streams, ponds and other water features. Their size also makes them suitable for planting as flowering hedges. Deer tend to pass them buy. When buying hibiscus plants for sale online, make sure they are suitable for your grow zone and take into account their mature height and spread.