Ask for referrals! Some clients just don't know they are supposed to tell their friends and family about how much you have helped them. Also, ask them to write reviews on yelp, google etc. Personalized reviews, like on yelp or google, can be really helpful when you are first starting out.
We have a boutique cut flower farm in Southern Chester County called The Farm at Oxford. Growing unique and unusual flora and fauna, we love to sell to our local designers for their weddings and events. We also offer a bouquet share CSA to locals who want fresh flowers on the regular in their homes.