Hibiscus Dinner Plate Red shrub. This hibiscus has very bright red petals with a small dark maroon center is exceptionally nice are 8 to 10 inches across. Growing up to 4 feet tall and 3 feet wide, this is a real asset to your yard. Oval shaped leaves of medium green add extra interest to this 3 to 4 foot open shrub. Hardy in zone 7 to 11