Stained Glassworks coleus offers growers several different options in vigor, habit, leaf shape and color. New for the 2010-11 season are Eruption and Green Autry. These coleus do well in full or part sun and can be grown in 4- to 6-inch pots, baskets and combos. Typical crop timing is six to 13 weeks, including time in propagation.
Choose a sterile media with good aeration and porosity between 5 and 15 percent. Avoid excess irrigation and fertilization while plants are establishing; it can lead to slow root development. Begin fertilizing two weeks after transplant. Apply 150- to 200-ppm constant liquid feed. Maintain pH between 5.5 and 6.3 and EC between 1.5 and 2.0.
Coleus can be grown successfully at a wide range of temperatures, but for best results, the crop should be established warm. Coleus will tolerate bright light, but shadier conditions will yield more intense foliage color. These varieties will tolerate 4,000-6,000 foot-candles, but foliage color will be more intense with 1,500-3,000 foot-candles.
Pinch once after transplant, when plants have established. Plants can be pinched a second time as needed for shape or height control.