Shrubs have one of two types of roots — taproots or fibrous roots. Taproots grow deep into the ground in search of moisture and nutrients. Fibrous root systems are shallow and lie close to the surface of the soil. … Many broad-leaved evergreens and certain deciduous shrubs have shallow root systems.

How deep are roots on shrubs?

Tree and shrub roots can grow from 18 inches to over 24 inches into the ground, so they need deeper water penetration. This means you need to allow your irrigation system to run for a longer time for trees and shrubs than you do for your lawn.

How far do bush roots spread?

Most tree roots spread 2-3 times the radius of the canopy, and often reach out 5 times the radius of the tree canopy or more in dry conditions. So, for example, if a tree is 6m wide, the radius of the canopy is 3m.