White clover is a perennial broad leaved weed. No, it isn't lucky like a four leaf clover. In reality it is a very difficult weed to control. Clover used to be added to grass seed mixes because of it's ability to collect nitrogen from the atmosphere. The nitrogen helps a lawn become established. It is is one of the most prevalent weeds throughout the United States.What time of the year do I have to look for clover?
It appears in early spring. It spreads aggressively because of it's seeds and it's root system both above and below the ground. If it rains enough, it is not uncommon for it to continue to grow throughout the fall. When your lawn goes dormant during the fall or during periods of drought it may leave brown patches on your lawn.
It has leaves shaped like a shamrock with a pom-pom type flower in the middle.
White clover grows best in moist and high phosphorus soils. If it has rained a lot during the season, don't water your lawn. Also, check the phosphorus levels in the fertilizer you use. By adjusting the amount of the moisture in the soil and your fertilization program you may eliminate the problem.
If the problem continues you may want to apply a post-emergence herbicide like a granular weed-and-feed product. Be sure the product you use specifically states it controls clover. If the clover is only invading a specific area on your lawn, you should consider only spot spraying those invaded areas. Remember always read the directions on the packaging of the product before you actually use it. When using chemicals, safety always comes first.
Several applications of the herbicide may be necessary to eliminate the clover completely. If it reappears in small areas, spot treat those areas with a spray as necessary.