Flower show exhibit
Your first step is to download and peruse the Flower Show 2018 Exhibitor's Guide.
Download the Exhibitors Guide listed on this page - look for the link in column on the right. Be sure to read this page and click on the left column link "How to enter plants in the Flower Show." If you have additional questions, be sure to send them to firstname.lastname@example.org.
Hope this helps, and good luck!