Double-aerating crushes already-loose soil structure, creating compaction instead of curing it.
Each additional pass increases density by 12% in moist clay. The calculator factors soil moisture and equipment weight to set optimal pass count.
Soil temperature at 4-inch depth is the only signal that matters. In NC's Piedmont, the ideal window shifts 3-4 weeks year to year.
Aerating above 18% moisture creates clods. Below 10% creates dust. The calculator pinpoints the exact moisture band for your soil type.
The calculator combines soil type, temp at depth, and equipment specs to output your exact aeration date window and pass count.
Improper aeration reduces water infiltration by 40%, increases runoff, and compacts root zones deeper than the tines reach.
Roots reach 6"+
Roots crammed at 2"