View All: Articles

June 08, 2012
Each spring, Team GPN roadtrips along the California coast to visit with the many breeders and suppliers exhibiting at the Spring Trials. It’s sort of like floriculture’s “fashion week.” This is where the new varieties and big trends in the industry...
June 08, 2012
To learn about diseases affecting azalea, click on the PDF link below.
June 08, 2012
Now that it’s June, hopefully you are getting a chance to catch your breath and start to take a look at what happened this spring. What I have been hearing from growers and retailers across the county, Spring 2012 has been an eventful one. Thanks to...
May 10, 2012
Temperature and light conditions in a greenhouse vary significantly throughout the year, especially in northern, temperate climates. During the winter, our environmental concerns for greenhouse production typically focus on low light levels, short...
May 10, 2012
Can you remember what echinacea looked like 10 years ago? Lanky, pale, floppy plants? These were the norm. The older coneflowers in the trade had few blooms and two colors; faded pink and white. Thanks to the work of Jim Ault, Richard Saul, Ari...
May 10, 2012
Delosperma, commonly referred to as ice plant, is an underutilized plant that has great potential in perennial programs. Ice plant forms low-growing mats of succulent foliage with daisy-like flowers and grows well throughout much of the United...
May 10, 2012
The greenhouse environment, including light and temperature, has a large impact on our ability to grow and schedule high-quality greenhouse crops. Additionally, energy costs are second only to labor for many in today’s greenhouse industry. As a...
May 10, 2012
Choosing varieties to add to your production always involves some risk. What maintenance will the plant require? How will it stand up to inclement weather? What will it look like as it matures? Will it appeal to the consumer? To help answer these...
May 10, 2012
If you want to see what lies ahead for the horticulture industry, then this is a good place to start — GPN’s inaugural 40 Under 40! These 25 men and 15 women are some of the brightest minds in horticulture and they are already charting the course...
May 10, 2012
To learn more about diseases affecting asters, please click on the PDF link below.
May 10, 2012
Wouldn’t you like to have a crystal ball that you could peer into to see what the future might look like? Wouldn’t it be nice to know which direction the horticulture industry is headed?Your job would be so much easier if you had access to that type...
April 20, 2012
There are several plant growth retardants (PGRs) that contain the active ingredient paclobutrazol, including Bonzi (Syngenta), Downsize (Greenleaf Chemical), Paczol (OHP), Piccolo and Piccolo 10XC (Fine Americas). The concentration of paclobutrazol...
April 20, 2012
One of the most unique new introductions in the past year, the Under the Sea Coleus collection from Hort Couture has a unique subset of leaves that make them resemble the most intricate of sea creatures. From the diminutive ‘Red Coral’ and ‘Molten...
April 20, 2012
In recent years, gerbera has become increasingly popular in the bedding plant and indoor potted plant industries. Gerbera produces an abundance of cheerful daisy-like flowers consisting of numerous vibrant flower colorations. In the past, numerous...
April 20, 2012
Why save energy? Three reasons come to mind. 1. Purchased energy is a significant and ongoing expense for most greenhouse operations. 2. There is high probability that energy prices will continue to rise. 3. Most greenhouse operations have the...
April 20, 2012
Growers have inquired about using mycorrhizae in professional peat and bark mixes. Most people are not familiar with mycorrhizae and there is confusion and misleading information in the industry about these beneficial organisms. This article is...
April 20, 2012
Western flower thrips (Frankliniella occidentalis) is the most destructive insect pest of greenhouses worldwide causing both direct and indirect damage to a wide range of horticultural crops. The primary means of dealing with these pests in...
April 20, 2012
The Department of Horticulture and Landscape Architecture (HLA) at Purdue University can trace its roots back to 1884, when Professor James Troop founded the Department of Horticulture and Entomology. Since then, the departments have separated, but...
April 20, 2012
In this issue, we present a summary of diseases that occur in phlox. Remember: Product controls are based on research trials and do not reflect an endorsement of any sort. Click on the PDF below to learn more.
April 20, 2012
Are you ready for the storm that is brewing out there among consumers? Over the past few years, there has been a lot of talk about how Baby Boomers, the core gardening customer of the past couple of decades, will not be buying as many plants as they...