Published September 9, 2026
Mulch leaves into the lawn with the mower while you can still see about half the grass underneath, and start hauling them off once you cannot. That one rule covers most of leaf season. What catches Central Texas homeowners out is that there are two leaf seasons here, not one, and the second arrives in late winter after everyone has put the rake away.
Mulch-mow until you can only see about half of the lawn surface, and stop mulching below that. University of Minnesota Extension puts the cutoff plainly: once less than 50 percent of the lawn is visible, start removing leaves instead of grinding them in. Penn State Extension frames the same limit by depth, describing a shredded layer up to about half an inch as beneficial to the lawn.
The mower does the work. A double pass produces a finer mulch than a single one, and the pieces need to be small enough to fall between the blades rather than sit on top of them. Texas A&M AgriLife's Don't Bag It plan makes the same point, noting that a light covering of leaves can be mowed and left in place, and that the technique works best with a mulching mower.
Keep the cut height where the turf wants it while you do this. AgriLife's St. Augustinegrass guide (EHT-144) puts the maintained height at 2 to 4 inches and advises removing no more than one third of the green canopy at a time. Scalping the lawn to chop leaves faster trades one problem for a worse one.
A mat of whole leaves blocks the light the grass needs to stay alive. St. Augustinegrass is the most shade-tolerant warm-season turf we run into, and AgriLife still puts its requirement at a daily minimum of 4 to 6 hours of light to survive. A packed leaf layer over a dormant-but-living lawn takes that away for weeks at a time, and the shape of the dead area in March is the shape of the pile.
The second problem is water. Wet leaves hold moisture against the crowns exactly when Central Texas turf is most vulnerable to large patch. AgriLife's large patch guide (E-633) notes the disease occurs when temperature is below 70 degrees Fahrenheit, puts the treatment window at October to November, and lists reducing leaf wetness periods among the management steps. AgriLife's Williamson County office adds that the fungus behind it, Rhizoctonia solani, sits in the soil year-round and takes advantage of cool temperatures and wet soil, and that large patch thrives in lawns with poor drainage.
That is also the one caveat on mulching. EHT-144 advises against returning clippings during times of active disease. If a lawn already has patches running, take the leaves off it rather than chopping them into it, and treat the disease first through a lawn treatment program.
Twice, and the second one surprises people. Most of the yard follows the ordinary autumn schedule, but live oaks do not. The Texas A&M Plant Clinic is direct about it: live oaks are not true evergreens and drop their old leaves as the new ones emerge, typically in late January and in February as temperatures begin to rise.
This is normal and not a disease problem. If you want to confirm it on your own tree, look at the base of a dying leaf for the new bud sitting at the petiole, which is what tells you the tree is cycling rather than failing.
| Season | What is dropping | What to do with it |
|---|---|---|
| Late fall | Pecan, elm, cedar elm, ash and the rest of the hardwoods | Mulch-mow while grass stays visible; move the surplus to beds |
| Through winter | Whatever blew in and settled against fences and beds | Clear mats off turf so the lawn is not shaded going into green-up |
| Late January into February | Live oaks, dropping old leaves as new growth pushes | Second cleanup, right before spring green-up |
The practical consequence is scheduling. A property with live oaks needs a cleanup booked for late winter, not just for November, and that second pass lands at the most useful possible moment, immediately before the turf wakes up.
Into the landscape, not to the curb. Don't Bag It notes that leaves hold 50 to 80 percent of the nutrients a plant pulls from the soil and air over a season, which is a large amount of fertility to set out for collection. AgriLife's own numbers on the waste side are blunt: at least 20 percent of the solid waste Texans generate is landscape waste, and roughly half of that is tree leaves.
The national picture matches. The US EPA put yard trimmings at 35.4 million tons, or 12.1 percent of municipal solid waste generation, with landfills still receiving about 10.5 million tons, 7.2 percent of everything landfilled.
Don't Bag It gives depths for the surplus that will not fit on the lawn. Shredded leaves go 3 to 6 inches deep around the base of trees and shrubs, 2 to 3 inches in flower beds, and a 6 to 8 inch layer tilled into heavy clay soil improves aeration and drainage, which is worth knowing on the clay most of our service area sits on. Bagged leaf compost finishes in about 6 to 8 weeks. Mulched leaves also return nitrogen, potassium and phosphorus to the lawn, cover bare spots and suppress weed seed germination, and Penn State cites Michigan State research finding no negative effects from mulching leaf litter into turf, including fewer broadleaf weeds.
When the volume outruns the mower, which on a lot with mature trees it will. Mulch-mowing works until the leaves are deep enough that grinding them in would break the half-visible rule, and past that point the job is collection and redistribution: leaves off the turf, shredded, and moved into the beds where the depth guidance above applies. That is recurring mowing maintenance and landscape maintenance doing the same work in one visit rather than two.
If your property is in Georgetown or the surrounding area and it has live oaks on it, the one thing worth changing this year is putting a second cleanup on the calendar for late winter. Our crews are already in those yards on a maintenance schedule, and folding the February drop into the route costs a lot less than replacing the strip of turf that spent six weeks under a leaf mat.
CTX Mowing handles fall cleanup and the late-winter live oak drop as part of a regular maintenance schedule. Get a free quote today.
