Current Issue

The health of the plants in your greenhouses corellates directly to the health of your business. If your plants aren’t healthy then, most likely, your bottom line is probably looking a little sickly too. To help you produce...
Biochar is charred organic matter that remains after a process called pyrolysis. Pyrolysis is a thermochemical decomposition of organic matter. In this process, organic matter is subjected to extremely high temperatures (200...
Water-soluble fertilizers (WSF) are the principal fertilizer type used by greenhouse growers. WSF are made from soluble nutrient raw materials that are mixed into stock tanks and delivered via injectors through an irrigation...
What do you think most consumers are looking at when they are standing in front of a retail plant display? Most growers would probably say it’s the plants if they’ve done a good job of producing a quality crop. The answer...
Echinacea has become a mainstay in the American landscape. Although this perennial genera is not new to the industry, the last decade has seen an abundance of colorful new cultivars hitting the marketplace and reviving the...
ARC:  I know most plant pathologists recommend preventive disease control and most growers practice “curative” programs. It’s just human nature to wait until evidence of a problem presents itself before acting. What are...
Many greenhouses today have backend systems that are used for processing orders, maintaining their production, keeping an accurate inventory and tracking labor. For many, access to these backend systems means being at your...
Bossa Nova, a Begonia boliviensis introduced this spring from Floranova, is a fantastic new option for use in dramatic hanging baskets, colorful combination planters and a variety of other applications where continuous color...
Plant growth retardants are routinely applied to inhibit extension growth to keep plants short and compact. Although effective, growers are sometimes interested in other ways to control plant height, particularly on edible...
When it comes to making landscape purchasing choices this year, consumers are basing their decisions on two major areas — enhancing their outdoor living areas and the environment. Earlier this year, Houzz.com surveyed more...
ARC:  When we both started in our respective careers, most plant disease control products were quite broad in their spectrum of activity.  In 1979, my first exposure to  fungicides was testing an experimental...
In the June issue of GPN, you read about some of the trends we came across during our journey through California for the 2014 Spring Trials. This month, we’re focusing on the new variety introductions that made their debut...
As the title of this article implies, ‘research’ is literally, and figuratively, our middle name. We are the Greenhouse Production Research Group (GPRG), a part of the USDA’s Agricultural Research Service (ARS). The...
Water shortage and poor water quality are critical challenges to gardening and landscaping in many regions of the world and will no doubt continue to challenge our industry. With rapid increases in urban populations and...
If you like Oriental lilies, the spectacular new Roselily series of double Orientals from Zabo Plant may soon become your new favorite type of Oriental lily. This series features double flowering cultivars, which are pollen...
Question: I am contemplating the use of biological control against fungus gnats. Can you please provide information on the commercially available biological control agents?  Answer: Fungus gnats (Bradysia spp.) are...
When I started at the University of Florida in the early 1980s, we had no effective products for biological control of diseases. It was the time frame when many of our industry standard fungicides were being developed...
This year, Selecta introduces all-new genetics of interspecific impatiens for a great opportunity to grow and merchandise a shade product with confidence. Bounce is highly resistant to Impatiens Downy Mildew, making it the...
Application of plant growth retardants (PGRs) is the most common technique used by greenhouse growers to control crop height. When used at an appropriate rate and volume, PGRs can elicit desirable results, such as improving...