Plant Problem Diagnostic
How to Identify and Control Dandelions
The short answer
Dandelion (Taraxacum officinale) is a perennial weed forming a flat rosette of jagged, deeply lobed leaves, with bright yellow flowers on hollow, leafless stalks that become white seed puffballs. Leaves and stems exude a white milky sap. It regrows from a strong taproot found in the top 6 to 18 inches of soil.
For physical control, dig out the entire plant, taproot and all, because the plant can regrow even when just an inch of root remains. A dense, healthy turf is the best long-term defense against dandelions moving in.
How to identify dandelions
- Flat ground-level rosette of jagged, deeply lobed leaves
- Bright yellow flowers on hollow, leafless stalks
- White seed puffballs when it goes to seed
- Milky white sap in leaves and stems
- Perennial with a deep, persistent taproot
Cultural and physical control
Dig out individual plants and small patches, removing as much of the taproot as possible to prevent regrowth; mowing alone will not control it. Maintain a thick, vigorous lawn through proper mowing, watering, and fertility so dandelion seedlings cannot establish.
When to escalate
If dandelions are too numerous to dig out or keep returning from deep roots, consider escalating. For chemical control options and correct timing in your area, consult your county Extension office.
→ For chemical control options, contact your local county Extension office for guidance suited to your lawn and region.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- University of Minnesota Extension — Dandelions — Perennial rosette weed, deep taproot, dig out entire plant since fragments regrow, dense turf is best defense
- UC IPM — Dandelion — Taproot in top 6-18 inches, regrows from as little as an inch of root, rosette of lobed leaves with milky sap and yellow flowers