Utah State University Extension
Each season brings with it new colors and emotions. The goal of this fact sheet is to aid the homeowner in selecting plant material that will offer season-long interest in the landscape. Different colors can add variety, but too many may create chaotic color schemes that are aesthetically offensive.
Gunnell, Jaydee, "Seasonal Splendor (Planting for Color)" (2009). All Current Publications. Paper 1075.