Core Aeration for Zoysiagrass: Timing, Technique, and Equipment Selection

When to Aerate

Early summer during rapid growth. On compacted soils, twice yearly is fine. Fertilize and water after for quick recovery.

Why Aerate?

Holes allow water, oxygen, nutrients to reach roots → deeper roots → better drought/disease resistance.

Best Equipment & Technique

• Core (hollow-tine) aerator pulls plugs—best.
• Spike aerators: little benefit.
• Criss-cross pattern; ensure 12+ holes/sq ft.
• Let plugs dry 3–4 days, drag carpet to break up.

Clay Soil Reality

Southern clay packs hard. Aeration is the practical solution—no full renovation needed.

Research-Backed Benefits

UGA study: core aeration increased deep rooting and water extraction by 25%; spike aeration no effect. Plugs also decompose thatch naturally. Great for overseeding fescue (holes = seed pockets). Fertilizer penetrates deeper.

Common Questions

Collect plugs? No—let dissolve or break up after drying.
Spike vs. core? Spikes compact soil and glaze holes; cores are superior.
Aerate after crabgrass preventer? No effect—MSU research confirms pre-emergent still works.