How can I get my art on display in the show?
Dylan, there was not a contest to exhibit the art. You were looking at the exhibit of the Philadelphia Society of Botanical Illustrators. Here is the description from PSBI from this year's Show:
Philadelphia Society of Botanical Illustrators
306 Green Circle, Exton, PA 19341
Contact: Joan Frain, www.psbi-art.org, http://psbiartists.blogspot.com
Her Majesty’s Bouquet
England has long been the epicenter for the revival of modern botanical illustration. The widely diverse climates of the various regions of the British Isles provide the artists with a vast choice of subject matter for their exquisite, original works of art. The artists interact with the public with ongoing demonstrations of techniques and are eager to answer questions from young and old about the brightly colored original watercolor paintings and delicate graphite and colored pencil drawings.
You would need to contact the Philadelphia Society of Botanical Illustrators to learn about membership and exhibiting. Hope this helps.