Controlling Live Oak Root Suckers in an Irrigated Landscape

Why Herbicides Are Risky

Suckers from live oak roots share the parent's vascular system. Herbicides applied to suckers can damage or kill the main trees.

Cutting: Regular removal is safest, though labor-intensive near irrigation.
Growth Retardants: Foliar-applied products (e.g., paclobutrazol) slow sucker growth without harming the tree. Check with a local nursery for availability.

Suckering is a genetic trait; some trees sucker more. Retardants reduce frequency but don't eliminate the need for occasional cutting.

Trees: Two Phalaenopsis, Two Problems: Light, Roots, and Repotting Fixes; Italian Cypress Roots & Driveways: Low Risk, But Mind the Spacing; Controlling Locust Root Sprouts Without Killing Your Lawn; Protecting Tree Roots During Sewer Line Installation; Ficus Tree Removal: Stump Herbicide Prevents Resprouting; Stopping Bradford Pear Root Suckers After Mower Damage; Poplar Roots and Neighbor's Foundation/Septic: Barrier Option; Apple Tree Roots and Pool Wall Safety; Bradford Pear Root Suckers: Causes and Management; Installing Septic Lines Near Mature Spruce Trees

Garden Articles

Plants