I have a customer that has about 30-35 30ft+ pine trees for a hedge over 2/3 of her back yard. It's a pain in the butt to trim under and inbetween but I may ask permission to use some killsall or something for that, but anyway, the pine cones are getting crazy now and are all over the place around the grass where I use my mower. I have just been running them over, but I can tell it's not as easy as grass. The question I have is though, can these pine cones mess my mower up, or just maybe dull the blade a little. I'm only there once a week and it's my only customer with cones. So far my mower is doing ok. I've just replaced a wheel and a few other small things. The wheel was my own fault.