"Peter" wrote in message
...
I know that you should scarify a lawn in the Autumn or in the Spring, but
when is it too late, in the Autumn to do this and why. I am able to hire a
scarifier for the end of October.

When? Well that depends!

Why? Because after scarifying the grass needs to recover and regrow - if the
weather is too cold it will not grow and may be further damaged by the
winter weather.

pk