[Onawa]

I'm looking at getting a small spring tine harrow with the hope of getting rid of some of the dead and rubbish in my grass... but when is the grass too long to harrow? It's probably about ankle height currently with plenty of weeds that are taller....

[landroverroy]

I'm looking at getting a small spring tine harrow with the hope of getting rid of some of the dead and rubbish in my grass... but when is the grass too long to harrow? It's probably about ankle height currently with plenty of weeds that are taller....

Depends how thick it is also. i would be tempted to get something to eat down the new growth you have, and then harrow what's left. Otherwise - just try it and see if you get the desired effect.