A method that allows the effect of temperature treatments on plant quality to be quantified is
described. The proposed method is based on the analysis of temperature regions for plant quality
characteristics and enables an easier and more precise analysis of the influence of day and night
temperature on plant growth and development. Plant quality may be evaluated by the combination
of any number of plant characteristics. The proposed method can assist growers in determining what
temperature regimes are necessary to produce acceptable-quality crops on specified days.