All-American Selection
Abbreviation: AAS

American Takii, Inc.
Abbreviation: TAK

AmeriSeed

Ball FloraPlant
Abbreviation: BFP

Ball Horticultural

Ball Ingenuity
Abbreviation: BI

Ball Seed

Beekenkamp

Blooming' Easy

Brushwood Nursery
Abbreviation: BWN

Burpee Home Gardens
Abbreviation: BHG

Classic Caladiums
Abbreviation: CC

Danziger
Abbreviation: DZ

Darwin Perennials
Abbreviation: DP

David Austin Roses
Abbreviation: DAR

Davis Floral Co.

Dummen Orange
Abbreviation: DU

European Takii

Evanthia Seeds and Plants

Floranova Seeds
Abbreviation: FL

Garden Choice

Green Fuse Botanicals

Intrinsic Perennial Gardens
Abbreviation: IPG

J. Berry Nursery

James Greenhouses
Abbreviation: JGH

Jelitto Seed Co.
Abbreviation: JE

Kieft Seeds
Abbreviation: KF

Metal Fabricators, Incorporated
Abbreviation: MFI

Monrovia

Must Have Perennials

North Creek Nurseries
Abbreviation: NC

Oldcastle Lawn and Garden
Abbreviation: OLG

PanAmerican Seed Co.
Abbreviation: PAS

Plant Delights Nursery, Inc.
Abbreviation: PD

Proven Winners
Abbreviation: PW

Rijnbeek and Son Perennials

Selecta
Abbreviation: SFC

Skagit Gardens, Inc.
Abbreviation: SKA

Star Roses

Suntory Flowers

Syngenta
Abbreviation: SYN

Van Belle Nursery

Walters Gardens
Abbreviation: WG

Western Pulp
Abbreviation: WP