One big reason is that you're hiring an expert who can diagnose problems. We can tell you whether or not the problem with your lawn is simply a lack of water, an insect, or a disease. This is not easy for a homeowner to figure out on their own. When you hire GreenPro, you know that your specific lawn problem will be diagnosed and treated, which takes the guess work out of it, thus saving you time and money. We can offer our customers this type of commitment because we know we're applying the right amount, of the right products, at the right time. When you do it yourself, you can't be sure of that. You also need to put down specific products at the right rate and at the right time in order to effectively correct many lawn problems, including crabgrass. We make sure that happens.