The All-America Selections (AAS) organization is a nonprofit plant trialing organization started in 1932. Plant trial winners are introduced each year. In 2008 the three Polk County Master Gardener’s gardens (Demonstration, Discovery and Enabling) were designated as AAS Display Gardens.

Each year the Demonstration Garden showcases AAS flowers, vegetables and herbs. In 2014 a dedicated AAS floral display area was created, although several AAS varieties may also be found in other areas of the garden. Numerous AAS vegetable varieties may be found in the Raised Vegetable garden. Each year new varieties of flowers, herbs and vegetables are tested and receive awards resulting in a changing display at the Demonstration Garden.