The Royal Horticultural Society (RHS) set out to help by creating its  Award of Garden Merit (AGM). Unlike the society’s other awards which were often given after inspecting cut stems in a vase, this award is based on how well plants actually grow in gardens. RHS Award of Garden Merit indicates that the plant is recommended by the RHS, having been through rigorous trials. The RHS AGM is awarded only to plants that meet the following criteria:

- Outstanding excellence for ordinary garden decoration or use

- Available for general purchase

- Good constitution

- Do not require highly specialist growing conditions or care

- Are not particularly susceptible to any pest or disease

- Are not be subject to an unreasonable degree of reversion in its vegetative or floral characteristics

To see our RHS Award of Garden Merit winners, click here.

Other award winner resources include:

AAS Winners (Flower, Bedding Plant, Vegetable)
All-America Selections
http://www.all-americaselections.org

Daylily of the Year
The American Daylily Society
http://www.daylilies.org

Hosta of the Year
The American Hosta Society
http://www.hosta.org

Plant of the Year (Perennials)
Perennial Plant Association
http://www.perennialplant.org/index.php/education/plant-of-the-year

Georgia Gold Medal Plants (Annuals and Perennials)
The University of Georgia Plants Selection Committee
http://www.georgiagoldmedalplants.org/

Proven Winners® Trials (Annuals and Perennials)
Trials held at universities and botanic gardens for Proven Winners®, a company that introduces new plants.
http://www.provenwinners.com/informationcenter/trials.cfm