Kermit the Frog once crooned “It’s Not Easy Being Green.” If you have a lawn, you can relate: It’s not easy keeping things green. Here's how to plot a course, whether you call in the pros or go it alone.

The proposals Checkbook's undercover shoppers get from lawn care services rarely agree on identification of weed species, presence of disease, need to correct soil acidity, and recommendations on core aeration.

Lawn care services work with different products and techniques, but the results they promise are similar. Companies usually offer customers a selection of “packages” that include specified treatment plans to take place over the course of a year.

Healthy though they appear most of the time, on occasion your trees might become shady characters, done in—and perhaps ultimately brought down—by disease or damage or both. We advise you on how to choose a tree care professional.

Once you have chosen a company that can do the work well, price becomes your primary consideration.

You don’t need to be an expert to spot many potential tree problems. Like most plants, trees have ways of indicating distress. Several times a year, examine your trees for the following...