Flowers should be harvest when the first lateral buds open. Plants will reach a height of 24 to 30 inches unless they are the more compact varieties now available on the market. Disease problems include root rot and damping off. Preventative drenches are recommended. It is also important to start with a well-drained, pasteurized media and to run the crop on the dry side.
Major insects infesting lisianthus are whitefly, mites, thrips and aphids.