 Well, at ZAMZO's, we use L-A-W-N as an acronym to mean light, air, water, and nutrients, which is what every plant needs. Light's not usually the problem this time of year. Air becomes a problem when you have compacted soil. That's where ZAMZO's Pentaturf works miracles and breaks up heavy clay and compacted soil, allowing air and water to go vertical. In fact, the W in lawn stands for water.