Haven't tried it yet. I had no long grass at my house when i got it home so ran it over some 1 foot tall annuals in the garden bed. Seemed to go alright, was impressed by how fine it chopped up. I actually thought the deck chute was blocked cause i couldn't see much coming out. I'll let you know how it goes but not much long grass around now. Amazing how things have changed since Easter. The grass has stopped growing.