After years of experience selling properties, I have always  advised sellers that when selling thier properties , they should also check the front and back yards.  Are they well-kept or do they look like they’ve been neglected for the last six months?  Is the grass healthy and green and well-manicured?

A green grass is the color of money 

"The greener it is the more you will get!"

When buyers look for a house, they customarily concentrate on making adjustments inside the house; they understand that part of the house buying process is renovation.   

At least they’re prepared for this event, but when they see that the outside of the house also needs major attention, they could get discouraged – and dismayed no doubt – to see such an unkempt front yard and backyard. That alone could be the reason for a buyer not to buy.