Chemical Height Control of Lisianthus russellianus

Lisianthus russellianus Hook., syn. Eustoma grandiflorum, belongs to the Gentianacea and is native from the plains of Nebraska to Louisiana and Mexico. It is a tender annual, grows 45 cm high, and produces 5 lobed, purple, dark-eyed flowers in summer and fall. The flowers have been described as large as 10 cm across under favorable conditions and to number as many as 10 or more on a plant. Flowers have lasted up to 2 weeks.