Definition of root run in US English:

root run


  • The space over which the roots of a plant extend.

    • ‘Don't forget to add a mulch of pea straw to hold moisture and keep a cool root run.’
    • ‘These are small trees when mature, able to cope with a restricted root run and the pollution from passing traffic.’
    • ‘Most come from shaded woodland or, if they grow in the open, enjoy cool root runs among rocks on hillsides or in moisture rich soils by lake or riverside.’