One local resource that Crestwood residents can take advantage of is the University of Missouri Extension located at 132 E. Monroe Ave. in Kirkwood MO 63122.
They have a number of gardening resources and classes available. They also do soil analysis for $25.00. Nathan Brandt is their Horticulture Specialist. He told me that he welcomes people coming in and talking to him or showing him problems and questions they may have.
They have a variety of classes that range from Motorcycle Safety to Master Gardener programs.
The classes are listed at this website.
If you have gardening/horticulture questions of any kind, Nathan is a great local resource in Kirkwood. His contact information is below.