Dandelion
Broadleaf weed
Dandelion (Taraxacum officinale) is one of the most recognizable broadleaf weeds in North America, found in lawns, gardens, pastures, and roadsides. Gardeners and growers notice it because its bright yellow flowers and puffball seed heads appear almost everywhere and it is very hard to remove by pulling alone.
How to identify it
Dandelion grows as a low rosette of leaves that lie flat against the ground, with no upright stem until it flowers. The leaves are deeply and irregularly toothed, and the plant has a thick, fleshy taproot that can reach 6 to 18 inches deep. Each flower stalk is hollow, leafless, and holds a single bright yellow flower head that matures into a round, white puffball of seeds. When any part of the plant is broken, it releases a milky white sap.
Where it grows
Dandelion thrives in lawns, garden beds, cropland edges, pastures, and any disturbed or compacted soil, and it tolerates a wide range of conditions from full sun to partial shade. It is a perennial that flowers most heavily in spring and fall but can bloom throughout the growing season. It spreads almost entirely by wind-blown seed, and each mature plant can produce thousands of seeds that travel long distances on their tiny parachutes.
Why it is a problem
Dandelion competes with turfgrass, vegetables, and forage plants for water, nutrients, and space, and its wide rosette shades out nearby seedlings. Because the taproot regrows from any piece left in the ground, a few plants can quickly turn into a persistent patch. Its abundant wind-carried seed also lets it spread rapidly into neighboring lawns, fields, and beds.
How to manage it
The most reliable non-chemical control is to dig out the entire taproot with a narrow trowel or dandelion fork, ideally when the soil is moist and before the plant sets seed, since any root fragment left behind can resprout. Removing flower heads before they turn to puffballs greatly reduces new seed and keeps the population from spreading. In lawns, the best long-term defense is a dense, healthy stand of turf, kept thick through proper mowing height, good fertility, and reduced soil compaction so that open ground is not available for seedlings. In garden beds, a layer of mulch blocks light and makes new seedlings easy to spot and pull while they are still young.
Commonly confused with
Dandelion is often confused with similar yellow-flowered rosette weeds such as cat's ear (false dandelion), sow thistle, and hawkweed. You can separate true dandelion by its single flower per hollow, unbranched, leafless stalk and its smooth, hairless leaves, since the lookalikes usually have branched or leafy stems or hairy leaves.
General guidance for US lawns and gardens, focused on prevention and non-chemical control. For a confirmed identification and options specific to your area, contact your local Cooperative Extension office. Page updated Aug 4, 2026.