1) Start with mowing (it’s the foundation)
Keep blades sharp and avoid cutting more than 1/3 of the grass height at a time. In summer heat, raise your mowing height to protect crowns and shade the soil—this helps reduce water stress and suppress some weeds naturally.
2) Use pre-emergent the smart way (not as a guess)
Pre-emergent is preventative. Once crabgrass and other annual grassy weeds sprout, you’ve missed the easiest control window. In the Treasure Valley, that application window typically lines up with mid-March to early April when soils approach 55–60°F.
3) Water deeply, less often (and confirm coverage)
Shallow daily watering trains shallow roots. A better approach is deep, infrequent watering that encourages roots to chase moisture downward. If parts of your lawn stay dry or you see “hot spots,” it’s often a sprinkler coverage issue—not a fertilizer problem.
Homeowner test: Place 6–10 identical cups around a zone and run it for 10 minutes. If the fill levels vary a lot, you’ll get patchy growth no matter how good your fertilizer is.
4) Aerate when your lawn can rebound
In Meridian, core aeration is most productive during active growth windows: spring (roughly March–May) and fall (September–October). Fall often wins because the lawn is recovering from summer stress and can build roots heading into winter.
If your soil is compacted (hard to push a screwdriver into the ground) or you see puddling after irrigation, aeration can be a game-changer.