When and why is core aeration performed on warm-season lawns?

• A. Early spring to mid-summer when grasses are dormant
• B. Any time during the year for cosmetic benefit
• C. Winter when soil is frozen
• D. Late spring to early summer when grasses are actively growing to relieve compaction and improve root growth

Answer: (D)

Aeration relieves soil compaction and creates channels that allow air, water, and roots to penetrate the root zone. For warm-season lawns, timing it when the grass is actively growing—late spring to early summer—lets the turf quickly recover from the plugs and promotes stronger, deeper root development. Doing this during dormancy or winter is ineffective because the plants aren’t growing to fill in the holes, so recovery is slow and benefits are limited. Running core aeration any time purely for cosmetic reasons ignores the plant’s growth cycle; the best results come from aligning it with active growth so the lawn can take full advantage of the improved soil environment. After aeration, ensure adequate moisture and consider fertilization or overseeding to maximize the improvement.