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American Standard for Nursery Stock (ANSI Z60.1)

Purpose:
Provide buyers and sellers with a common terminology in order to facilitate
transactions involving nursery stock. The standard defines terms and numerical
relationships among tree parts.

It does not provide buyers with any assurance of the health or quality of
the nursery stock being specified or sold.

The standard allows parties to come to common language and relationships on the
following:

• measuring
  plants (caliper, height, branching height)
• specifying
  and stating the size of plants
• relationship among caliper, height, branch number
• root
  ball, container, or box size
  • box
    size:caliper chart
  • bare
    root spread:caliper:height chart
  • caliper:root
    ball diameter:tree height chart
  • ball
    depth:diameter chart
  • container
    size:caliper:height chart
  • fabric
    in-ground bag diameter:caliper chart
  • balled-and-potted
    same as balled-and-burlapped
  • collected
    root ball size:caliper (one size larger root ball than standard B&B)

See: View full 2014 version of the Standard (pdf)

Published
by the American Association of Nurserymen, Washington, D.C.