rootball

The clump of soil containing the roots of a tree, often bound in burlap.
Found on http://www.encyclo.co.uk/visitor-contributions.php

rootball

<botany> Nursery transplant with root stock and soil held together by burlap or other wrapping. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

Rootball

the roots and accompanying soil when a plant is removed from a container or lifted from the ground
Found on https://www.rhs.org.uk/advice/beginners-guide/glossary
No exact match found