It's a small courtyard lawn with underground irrigation. Seems to be a buffalo of some sort - really tough broad leaf, quite blue, with a really dense thatch. It took a few cuts initially to find the best length to cut it, as it was really spongy and would scalp easily in a couple of spots. Finally settled on 52mm.
Back in March it was looking pretty ordinary. The owner had some problems with the watering system and the lawn was looking shabby with weeds and bald spots (which I attributed at least partly to urination by the owner's female dog). We also seemed to have lost a lot of the buffalo and had some wispy green rygrass or similar in its place:
March.jpg 180.84KB 3 downloads
The owner got the irrigation fixed and I hit the weeds and did a couple of applications of feed, one charlie carp and one dynamic lifter. The buffalo dominated again but it never regained full strength, and the clover and rye etc kept coming back through it.
A couple of weeks ago I tried Munns weed and feed granules (allegedly buffalo friendly) but it did the opposite of what I hoped, it really blackened the lawn, and now the only healthy green to be seen is clover and rye grass.
Last week I cut it shorter than normal (42mm) in the hope it would remove the worst of the blackening and we'd see some signs of hope, but it looked just as bad yesterday.
So I gave it a good stiff rake and a serious 32mm scalping mow to try and reduce the thatch, in the hope that is at the root of the problem - I took away almost a full 240L bin of material from about a 20m2 lawn that isn't even growing! Must have taken a good inch or two of thatch out of it. I'm really hoping that will do the trick and a bit of sunlight and air will kick start some new growth from the remaining runners - I know it's probably a bit early in the season but I think we're past the frosts here now and the days are sunny, and I couldn't let the owner keep looking at it like it was. Although, it does look a lot worse right now
So anyway, do you think I am on the right track now with the dethatching?! Have I missed something, or just completely stuffed something up? I'm really struggling to understand what it's problem is.