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March 19, 2013
Like many ornamental plants, perennials are susceptible to numerous types of plant viruses. Growers often jump to conclusions when they hear the word “virus” and don’t consider that plant viruses are often not as destructive or common as diseases...
February 05, 2013
A plug or liner dip is a plant growth retardant (PGR) application technique in which a tray of finished young plants is placed into a shallow PGR solution for a short period of time.  This allows the growing media to absorb the PGR from the...
February 05, 2013
In September 2009, I visited the Florexpo facility in Paraíso, Costa Rica, and learned all about the 130 million cuttings they produce each year, sanitation protocols, their sustainable practices and so much more. In the December 2009 issue of GPN,...
February 05, 2013
The North American Poinsettia Trials reached a significant milestone this year — it has been evaluating poinsettias, in cooperation with the poinsettia breeder companies, for 20 years since it was started in 1993. The first trials include Allan...
January 10, 2013
January through March can be considered young plant season — a period in which seeds of many garden plants are sown and grown in plugs. Ornamental cuttings are also harvested, stuck and rooted as liners. During this time, the days are short and...
January 10, 2013
When it comes to lighting, the future is upon us. High-powered LED products, once the exclusive province of cutting-edge research, are invigorating today’s commercial greenhouse market. Your new choices, ranging from shelf lights and growth bulbs to...
January 10, 2013
Imagine cloning your most experienced, efficient  employees to get hundreds, or even thousands, of additional workers in your greenhouses who toil to improve the quality of your poinsettia (and other) crops and who never show up on your payroll...
December 07, 2012
In the past several years, growers have tightly sealed their greenhouses to reduce heat losses and save on fuel costs, but the consequence can be slower plant growth. If crops develop roots slowly, if shoot growth is retarded, or if plants don’t use...
December 06, 2012
As Roberto Lopez helped more and more growers working to better understand and manage light in their greenhouses, a light bulb came on: There had to be an easier way.Working with graduate student Christopher Currey, Lopez, an associate professor and...
December 06, 2012
Many growers seek spring flowering perennials with attractive foliage characteristics. Erysimum ‘Fragrant Star’ is an exciting stable variegated spring blooming wallflower, destined to earn a place in many perennial programs. ‘Fragrant Star’ is easy...
December 06, 2012
Penny Goff, general manager and co-owner of Gritt’s Midway Greenhouse in Red House, W. Va., says all of the greenhouse vegetable growers she knows who grow hydroponically use some type of substrate.   “Hydroponics to me means growing with water...
December 06, 2012
Over the past few years Plug Connection has become more focused on vegetative varieties. Our Spring Trials display is known for being the only large-scale objective, side-by-side comparison trial in the industry. I hear from sales reps and growers...
November 12, 2012
About three years ago, I decided to take my sixteen years of experience as a process mechanical engineer and apply it to the greenhouse industry. In my previous work life, I was accustomed to more traditional practices of design and construction...
November 12, 2012
Newly developed natural products are offered to growers every day. Depending on the type of product, the label claims can include increased insect and disease resistance, increased water use efficiency, higher plant quality and longer shelf life....
October 12, 2012
Temperature is the primary factor that controls the speed of developmental processes in plants, such as time to flower, root development, and leaf unfolding. Growers usually monitor and control the temperature of the air because it’s easy and...
September 10, 2012
A greenhouse operation, like any business, wins on its margins. Every infrastructure investment must be evaluated for its ability to sustain profit margin gains. Lighting is no exception. Yield gains achieved through artificial lighting are...
August 09, 2012
Incandescent lamps are on their way out — or at least the traditional ones. Beginning in 2005, countries began to phase out the manufacturing, importation and/or sales of incandescent lamps simply because they are so inefficient at converting energy...
July 11, 2012
Light-emitting diodes (LEDs) are one of the trendiest technologies in the greenhouse industry. There are particularly interesting opportunities with LEDs in the production of young plants (plugs and liners) and high-wire vegetable (tomato, cucumber...
July 11, 2012
Daylilies (Hemerocallis) have long been popular perennials at retail and in the garden because they are beautiful and very easy to grow.   The challenge for retailers is having daylilies in bloom while retail traffic is at its peak since they...
June 08, 2012
Plant quality is an elusive term to describe. If you ask a grower to define what crop quality is, a common response is to hesitate and then say, “I know it when I see it.” That’s probably because a lot of different parameters are simultaneously...
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