3.4.1 Plant Sizing

General Requirements
  • Shrubs
    should be minimum 3-gallon container.
  • Trees
    :
    • 1 ½” to 3” caliper recommended sizes;
    • Typically, 15-gallon minimum size. In “mass tree plantings,” 5-gallon minimum size is allowable; and
    • Trees with mature caliper of 4 inches or greater cannot be planted within clear zones.
  • Groundcovers and seasonal color
    : Groundcovers and seasonal color are discouraged within the ROW due to the high costs of maintenance and replacement. Zone I is the only zone where groundcover and annuals are allowed. Preferred minimum sizing to be 1 gallon. See
    Chapter 2
    for Zone I landscape materials.
Plant theft is an occasional problem, particularly if the project is near residential areas. In such cases, select plant sizes that discourage theft and avoid the use of small shrubs.