SEND THE RIGHT MESSAGE WITH YOUR GARDEN!
First impressions are everything. You only get one shot to impress new clients, after all. Once you've won them over with your small business prowess, your job becomes maintaining their business, including maintaining that image of success that brought them to your institution in the first place.
If what is in plain sight is not cared for, what message does that send to potential customers? In other words, it says that if you can not be bothered to take care of what is right in front of them, what's the state of things behind the scenes?
Regardless of what your industry is, maintaining the green area around your premises is basic to sustaining the picture of success and professionalism you've worked hard to earn. A tidy and well-maintained garden highlights to clients that you're in control, and that you will be able to take care of their affairs with a high amount of skill.