Poinsettia Height Control (1993)
Height control is critical for the production of a high quality poinsettia crop. Breeding programs have been active in producing cultivars which are naturally shorter growing. However, management of height artificially is still critical to produce a saleable crop. Traditionally, height control has been achieved through the use of chemical growth retardants. Increasing social concerns over the use of chemicals has lead to a renewed interest in non-chemical methods of height control. One non-chemical method which has proven to be economical and easily applied in the floriculture industry is to manipulate temperatures daily to limit stem elongation.
Source: • Minnesota Commercial Flower Growers Bulletin