Your party theme could play off of your business name, focusing on what your mother cared most about in her landscaping. Get props that reflect it and put up a little display. Dress in period costume, use old-fashioned tools and have someone work your landscape with them, while you greet people. Turn it into a little event with music, then invite the local media to attend. If they can't, sometimes you can write an article of your own and the local paper will publish it. Take photos to post on Facebook, or wherever you do your advertising. You don't necessarily want more people coming, but you do want to use the event to get your name out there.