A weed free lawn may seem more like a dream than a reality to many homeowners. However, with the right knowledge and tools it is possible. If your lawn is really that bad there is even still time to make a late season herbicide application. Once daily high temperatures reach the upper 80s and 90s spraying may actually do more damage to your lawn than good.
Before applying any herbicide to your lawn identify the weeds present and determine the type of control needed. Out of place plants can be identified by researching online or sending a picture or sample to your local county agent. Smartphone users can even download free weed ID apps to help narrow down the search. If chemical control is the best solution, select your herbicide and read the entire label carefully. Make note that the herbicide is labeled for use on your grass type.
For best results never spray herbicide during a period of drou-ght as weed control will be poor and damage to your lawn is more likely. Do not mow immediately prior to or following a herbicide application. Avoid spraying when the forecast predicts rain within the 24 hour period or when
windy.  On windy days chemicals may drift causing damage to you
or your neighbor’s home landscape.
As you begin to see improvement in your lawn’s looks remember
that weed control begins with good management practices. Mowing
at the correct height helps to build a thick, healthy lawn. Mow St. Augustine lawns to a height of 2 to 3 inches and centipede lawns
to a height of 1 to 2 inches. During periods of drought water deeply
so that the entire root zone is moist, encouraging root growth.
For more information contact the St. John Parish LSU AgCenter Extension Office at 985-497-3261 or visit www.lsuagcenter.com.
Mariah Bock is the LSU AgCenter county agent for St. John Parish. She can be reached by email at mbock@agcenter.lsu.edu.