Dandelion

Overview

Dandelion (Taraxacum officinale) is a simple perennial broadleaf weed found in lawns across all US zones. Its deep taproot (6-18 inches) makes it persistent — any root fragment longer than 1 inch can regenerate the entire plant.

Identification

Rosette of deeply serrated leaves radiating from a central crown at soil level. Bright yellow composite flower heads emerge on hollow stems, maturing into the familiar white seed puffs (each containing 50-170 wind-dispersed seeds).

Damage to Your Lawn

The flat rosette shades out surrounding grass, creating bare spots. The deep taproot competes for moisture well below the grass root zone. Prolific windborne seed dispersal means a few untreated dandelions can colonize an entire lawn within a season.

Why Pulling Usually Fails

The taproot breaks off during pulling. Any root fragment longer than 1 inch can regenerate the entire plant. You must extract the full root depth (minimum 4 inches) for pulling to work. A specialized stand-up weed puller (like Fiskars Deluxe) makes this practical when soil is moist.

Control Strategy

Post-emergent herbicide in fall is the most effective approach. Apply a 3-way broadleaf herbicide (2,4-D + dicamba + mecoprop) when dandelions are actively sending nutrients to their roots for winter storage. The herbicide follows the same pathway down to the root system, killing the entire plant.

Spring applications work but are less effective because the plant is pushing nutrients upward to leaves and flowers, not down to roots.