The two jobs that fix a tired lawn at ground level. Thatch and moss taken out, compacted soil opened up.
Scarifying uses vertical blades to cut down through the turf and pull out the layer of dead grass, moss and debris sitting between the green blades and the soil. That layer is called thatch.
A thin layer is normal. Once it builds past roughly a centimetre it holds water at the surface, keeps feed and rain off the roots, and gives moss somewhere comfortable to sit. Taking it out is the only way to clear it.
Hollow-tine aeration pulls thousands of small plugs of soil out of the lawn, leaving open channels behind. Air, water and nutrients get down to the root zone instead of running off the top.
It is the direct answer to compaction, which is what you get from foot traffic, heavy clay, pets and children. Solid-tine spiking has its uses, but on compacted ground it can make the problem worse.
A soft, springy feel when you walk on it usually means a thick thatch layer.
Moss killed off by treatment comes straight back when the conditions that suit it remain.
Puddles after rain, or water running off rather than soaking in, points to compaction.
Well-used routes across the lawn where the grass has thinned and the soil feels solid.
Treatments that should be working are being blocked before they reach the roots.
Grass losing density in areas that get the most use through the year.
This is the part worth being straight about. A scarified lawn looks rough when we leave. The blades pull out a surprising volume of material, the surface is thinned and scratched, and on a mossy lawn you will see bare soil where the moss was doing the covering. Aeration leaves soil plugs across the surface, which break down over the following weeks.
That is the work doing what it is supposed to do. Nobody should book scarifying expecting a tidy lawn that afternoon.
Timing matters. Early autumn is the best window in most years, with spring a good second. We do not scarify into summer drought or when the ground is frozen, because the lawn has no capacity to recover.
Scarifying and aeration across Telford, Shrewsbury and Shropshire