Welcome to the ShortStop 2 SC Tree Growth Regulator (TGR) support website of Greenleaf Chemical LLC. 

This site is dedicated to providing information to homeowners on the newest Paclobutrazol based TGR formulation now being used across the US by leading Utility, Arborist and Landscape Companies to slow the growth and  improve the health of selected trees and shrubs.

The Plant Growth Regulator activity of Paclobutrazol, the active ingredient in ShortStop TGR, was discovered in 1975 by the Founder of Greenleaf Chemical  while employed by Imperial Chemical Industries Ltd.  Although ShortStop is the newest available Product, Paclobutrazol has been commercially available on trees and shrubs since it was Registered by the EPA in 1982.  Paclobutrazol is also widely used in the Greenhouse and Nursery Industries to produce compact more aesthetically pleasing plants with the newest Product being Downsize Ornamental Growth Regulator, which is also available from Greenleaf Chemical.


If you have any questions or would like additional information you can:

• Browse our Frequently Asked Questions for common questions and answers
  
• Use the Contact US form or email info@shortstopsupport.com
  
• Call 1-866-319-2021 and we or one of our consultants will get back to you as soon as possible 
  

Thank you for visiting our site.

Please click on a link below to view plants that have been treated with
Paclobutrazol Plant Growth Regulator

Shrubs	Ornamentals	Trees