What's "normal" for aeration?

A new survey conducted by the USGA Green Section has some interesting numbers about putting green aeration in the USA in 2025. The survey results are in Brandi Merrick's Green Section Record article "Current Trends in Putting Green Aeration."

Here's what stood out to me:

- The survey includes responses from 174 superintendents representing 40 states, 82 private courses, 92 public, 136 cool-season grass, 38 warm-season - Courses with sand-based greens conducted an average of 5.8 aeration events in 2025;…