New Options in Plant Growth Regulator Use in the Greenhouse

New Plant Growth Regulators from Fine, ValentGreenhouse growers can now treat crops, then start working the next morning, thanks to a 50% reduction in Fine Americas’ Dazide plant growth regulator’s re-entry interval (REI) to 12 hours instead of 24. 

“This marks a huge gain in efficiency,” says Greg Johnson, President, Fine Americas, Inc., “especially since other PGRs still require a 24-hour (REI) reentry interval. It’s like gaining an extra day of productivity each time you treat.” 


The New Dazide has been reformulated so that it can be rewet, providing a new level of flexibility that growers haven’t had before. It works better in adverse conditions and can be rewet within 36 hours of the initial application to reactivate any of the active ingredient remaining on leaves. 

A light mist to moisten the leaf slightly ensures growers get every bit of power out of their daminozide. 

New PGR for Ornamental Use From Valent BioSciences 

A new formulation of the PGR 6-benzyladenine (6-BA) is now labeled for use on ornamental plants. Produced by Valent BioSciencesCytoFlor is made from a powerful plant growth regulator formulation that has been in use in the agriculture industry for many years. Valent BioSciences’ proprietary formulation features rapid absorption into the leaf, which reduces runoff and assures faster delivery and more thorough and efficient plant utilization of the active ingredient. 

6-BA, the active ingredient in CytoFlor, is an essential plant hormone for the growth and overall development of plants. 6-BA promotes cell division and differentiation in plant roots and shoots, and by applying this plant hormone, growers can harness these natural processes to gain greater control over the growth and habit of many ornamental plants. By promoting cell division, application of CytoFlor during vegetative growth can increase lateral or basal branching to create more compact and marketable plants. Application of CytoFlor can also increase flower bud formation when applied during the reproductive stage through its promotion of cell differentiation. 

Key ornamental crops that can benefit from CytoFlor include Christmas Cactus, Hosta spp., containerized annual and perennial flowering and foliage crops, containerized tropical plants, non-edible plants, non-bearing fruit trees, and ornamental apple and pear trees.  

Beginning at the end of October 2019, professional horticulture distributors will begin receiving their first shipments of CytoFlor. Find a distributor in your region by searching the Mycorrhizal Applications distribution network.