Hyacinths are a Rainbow of Colors with Head-Turning Fragrance! Choose from 9 beautiful colors, or purchase our special-value offer and try them all. Plant hyacinths deeply in any well-drained soil and they will perform for many years. They also force well indoors when given an adequate cold treatment. Forcing instructions are available upon request. Average height of all hyacinths is 8 to 10 inches.