All-American Selection
http://www.all-americaselections.org
Abbreviation: AAS

Almost Eden Plants
https://almostedenplants.com/shopping/default.asp
Abbreviation: AEP

American Takii, Inc.
http://www.takii.com
Abbreviation: TAK

Athena Brazil
http://www.athenabrazil.com/
Abbreviation: AB

Baker's Acres Greenhouse
http://www.bakersacresgreenhouse.com/
Abbreviation: BA

Ball Floraplant
http://www.ballfloraplant.com
Abbreviation: BLF

Ball Horticulture Co.
http://www.ballseed.com
Abbreviation: BL

Benary Flower Seeds
http://www.benary.com
Abbreviation: BEN

BioWorks Inc.
http://www.bioworksinc.com/
Abbreviation: BW

Blooms of Bressingham
http://www.bloomsofbressingham.com
Abbreviation: BOB

Brent and Becky's Bulbs
http://www.brentandbeckysbulbs.com/
Abbreviation: BBB

Brushwood Nursery
http://www.gardenvines.com/
Abbreviation: BWN

Classic Caladiums
http://www.classiccaladiumsllc.com/
Abbreviation: CC

Cultivaris
http://www.cultivaris.com/
Abbreviation: CULT

Daniel's Plant Food
http://www.danielsplantfood.com
Abbreviation: DPF

Danziger Flower Farm
http://www.danziger.co.il
Abbreviation: DZ

Darwin Perennials
http://www.darwinperennials.com/
Abbreviation: DWP

David Austin Roses
http://www.davidaustinroses.com/
Abbreviation: DAR

DeGoede Bulb Farms
http://www.degoedebulb.com/
Abbreviation: DG

Dummen U.S.A.
http://www.dummenusa.com
Abbreviation: DU

Dupont Nursery
http://www.dupontnursery.com
Abbreviation: DP

Fides North America
http://www.fidesnorthamerica.com
Abbreviation: FI

Floranova Seeds
http://www.floranova.co.uk
Abbreviation: FL

Goldsmith Seeds, Inc.
http://www.goldsmithseeds.com
Abbreviation: GS

Goodness Grows
http://www.goodnessgrows.com
Abbreviation: GG

Grolink / Athena Brazil
http://www.grolink.com/
Abbreviation: GRO

HEM Genetics
http://www.hemzaden.com/hemgenetics/
Abbreviation: HEM

Intrinsic Perennial Gardens
http://www.intrinsicperennialgardens.com/
Abbreviation: IPG

ItSaul Plants
http://www.itsaulplants.com
Abbreviation: ISP

J.P. Bartlett Co., Inc.
http://www.bartlettgreenhouses.com/
Abbreviation: BT

James Greenhouses
http://www.jamesgreenhouses.com/
Abbreviation: JGH

Jelitto Seed Co.
http://www.jelitto.com
Abbreviation: JE

Kieft Seeds
http://www.kieft-pro-seeds.com
Abbreviation: KF

Lis Freimoth, The Garden Hoe
http://www.thegardenhoe.com/
Abbreviation: TGH

Meadow View Growers, Inc.
http://www.meadowview.com/
Abbreviation: MV

Metal Fabricators, Incorporated
http://metalfabricatorsinc.com/
Abbreviation: MFI

Mt. Cuba Center, Inc.
http://www.mtcubacenter.org
Abbreviation: MTC

Niche Gardens
http://nichegardens.com/
Abbreviation: NG

North Creek Nurseries
http://www.northcreeknurseries.com
Abbreviation: NC

Northern Innovators
http://www.northerninnovators.com/
Abbreviation: NI

Oldcastle Lawn and Garden
http://www.myoldcastle.com/Products/Lawn_and_Garden/index.htm
Abbreviation: OLG

Pacific Plug & Liner
http://www.ppandl.net/
Abbreviation: PPL

PanAmerican Seed Co.
http://www.panamseed.com
Abbreviation: PA

Paul Ecke Ranch
http://www.theflowerfields.com
Abbreviation: EK

Plant Delights Nursery, Inc.
http://www.plantdelights.com
Abbreviation: PD

Plant Haven
http://www.planthaven.com/
Abbreviation: PH

Proven Winners
http://www.provenwinners.com/
Abbreviation: PW

Sakata Seed America, Inc.
http://www.sakata.com
Abbreviation: SK

Selecta First Class, Inc.
http://firstclassplants.com
Abbreviation: SFC

Skagit Gardens, Inc.
http://www.skagitgardens.com
Abbreviation: SKA

Sunny Border Nursery
http://www.sunnyborder.com/
Abbreviation: SB

Suntory Collection
http://suntorycollection.com/
Abbreviation: SUN

Syngenta
http://www.syngenta.com/en/index.html
Abbreviation: SN

Terra Nova
http://www.terranovanurseries.com
Abbreviation: TN

Tesselaar
http://www.tesselaar.com
Abbreviation: ATP

UGA Trial Garden
http://www.ugatrial.hort.uga.edu
Abbreviation: UGA

Vegetalis
http://www.vegetalis.co.uk/
Abbreviation: VEG

Walters Gardens
http://www.waltersgardens.com
Abbreviation: WG

Western Pulp
http://westernpulp.com/
Abbreviation: WP

Westflowers
http://www.westflowers.de/
Abbreviation: WLB