Utilizing tank mixes can help minimize excessive plant height. Unlike most greenhouse crops, perennials consist of a diverse array of plant species (literally thousands of them). Until recently, relatively little research has been conducted with perennials; therefore, the availability of high-quality cultural information is almost nonexistent. Consumer popularity, increased competition and stricter quality specifications have helped make controlling the height of perennials a real challenge for today's growers.
By Paul Pilon