Click on a topic in the menu to view specific articles (in pdf format) published in trade magazines. Articles posted with permission from Greenhouse Product News, Greenhouse Grower, Greenhouse ManagementGrowerTalks, and other horticulture magazines.

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  • Sumagic on vegetable transplants

    Published on November 18, 2012

    Sumagic is the only plant growth retardant registered for use as a foliar spray on young tomato, pepper, eggplant, groundcherry, pepino and tomatillo plants.

  • Plant temperature under greenhouse curtains

    Published on October 17, 2012

    Retractable energy curtains save energy costs by serving as an insulative layer and reducing the amount of space heated. In addition, plants under the curtains can be at least a few degrees warmer than plants not under a curtain.

  • Which light sensor should I use?

    Published on September 23, 2012

    This article focuses on the different units of instantaneous light intensity and how each is measured.

  • Replacing incandescent lamps

    Published on August 23, 2012

    Incandescent lamps can at least partly be replaced by compact fluorescent bulbs and/or LEDs without losing the ability to control flowering of ornamentals grown in greenhouses.

  • Lighting the way with LEDs

    Published on July 10, 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 and highwire vegetable crops.

  • High-temperature stress of bedding plants

    Published on May 17, 2012

    There are some bedding plant crops that tolerate high temperatures quite well, while others develop heat stress symptoms at lower temperatures.

  • Successful use of paclobutrazol

    Published on April 18, 2012

    Paclobutrazol is probably the most widely used plant growth retardant in the production of floriculture crops because of its wide range of efficacy and moderate- to long-lasting response.

  • e-GRO

    Published on March 30, 2012

  • Soil and Plant Nutrient Lab

    Published on March 21, 2012

    Michigan State University's Soil and Plant Nutrient Laboratory operates as an integral part of MSU providing support to teaching, research and extension programs.

  • Enviroweather Weather Data and Pest Modeling

    Published on March 15, 2012

    The Enviroweather Weather Data and Pest Modeling aims to help users make pest, plant production and natural resource management decisions in Michigan by providing a sustainable weather-based information system.

  • MSU Diagnostics Lab

    Published on March 15, 2012

    Michigan State University Diagnostic Services specializes in plant pathology, entomology, nematology and weed science work as a team to diagnose plant health and pest-related problems.

  • Long-day perennials

    Published on March 12, 2012

    One of the major flowering triggers of herbaceous perennials is exposure to long days (short nights). Learn which crops have this response, and tips on how to deliver long-day lighting..

  • Lighting greenhouse vegetables

    Published on December 7, 2011

    The primary way to increase fruit yield (fruit number and/or size) is to increase the amount of photosynthetic light provided to plants.

  • Control stem length with liner dips

    Published on November 18, 2011

    Dipping trays of rooted liners and plugs into a PGR solution, or liner dip, is a newer method of efficiently applying root-absorbed PGRs that controls stem elongation after transplanting.

  • Are you recognizing your heating costs?

    Published on November 17, 2011

    Crop heating costs increase as production time increases, the size of the container increases, and the earlier in the spring that plants are finished.

  • A new paclobutrazol (Piccolo 10XC)

    Published on September 18, 2011

    Fine Americas released a new, more concentrated formulation of paclobutrazol called Piccolo10XC. Plant responses were similar when the same active ingredient, volume, and application rate were used.

  • Watering bedding plants before shipping

    Published on August 22, 2011

    Although it is desirable to have a moderately moist media at shipping, the foliage should be dry to help prevent disease problems.

  • Propagating orchids

    Published on August 19, 2011

    Some orchids are among the most difficult plants to propagate. This article discusses the different ways that orchids can be propagated including by division, offshoots, tissue culture, and seed.

  • Using ABA to reduce water loss

    Published on August 18, 2011

    Michigan State researchers investigated how an experimental formulation of abscisic acid (ABA) influenced drought stress tolerance of finished potted garden chrysanthemums and aster. The product mentioned is not commercially available.

  • The red to far red ratio

    Published on May 23, 2011

    Plants absorb and use most of the red light available to them for photosynthesis, but reflect or transmit most of the far-red light.

  • Tips on using uniconazole

    Published on April 18, 2011

    This article provides suggestions for how and when to use uniconazole (e.g., Sumagic and Concise) as a spray or drench to obtain desirable, more compact ornamental plants.

  • Measuring greenhouse temperature

    Published on March 17, 2011

    The single largest advantage of using greenhouses to grow ornamental and food crops is the ability to provide desirable temperatures for plant growth and development.

  • Implications of base temperature

    Published on January 17, 2011

    Growers should avoid growing cold-tolerant and cold-sensitive crops together because crop timing, crop quality and heating costs cannot be optimized.

  • Grow perennials with your annuals

    Published on December 29, 2010

    Research at Michigan State University has determined the flowering requirements of more than 600 cultivars and species of herbaceous perennials.

  • Daily light integral & flowering of annuals

    Published on November 23, 2010

    The daily light integral can influence crop timing and quality characteristics including branching, flower number, and flower size. This article presents research-based information on how light quantity influences production of annual bedding plants.

  • Early growth regulator drenches on poinsettia

    Published on November 18, 2010

    A technique to inhibit stem extension of poinsettia is to apply an early, low-dose PGR drench. This article will compare the efficacy of low-dose and early drench applications of paclobutrazol on poinsettia crops.

  • The fundamentals of temperature

    Published on November 17, 2010

    The concepts of base temperature, optimum temperature, and maximal temperature are discussed in the context of greenhouse production of annual bedding plants.

  • Greenhouse temperature considerations

    Published on October 17, 2010

    This article presents some of the factors to consider when selecting temperature setpoints for growing ornamental plants.

  • The future of greenhouse lighting

    Published on September 24, 2010

    This article, written in 2010, gazes into the crystal ball about how light-emitting diodes (LEDs) will become the primary lighting source for plant applications.

  • How to avoid GA carryover

    Published on August 18, 2010

    Gibberellins (GA) can bind to plastic and concrete, and potentially cause excessive growth, especially in sensitive crops.

  • Spray vs. sprench vs. drench

    Published on July 18, 2010

    This article discusses three application methods for plant growth regulators: foliar spray, substrate drench, and sprench, which is a hybrid between a spray and a drench. Here are some guidelines to help you determine which method is most appropriate.

  • Correcting problems with HPS lamps

    Published on June 24, 2010

    High-pressure sodium (HPS) fixtures are widely used in greenhouse production, but they require maintenance for peak efficiency. Here is a list of the most common failures, and a little technical savvy to diagnose and repair them.

  • Do it yourself (conduct your own trials)

    Published on May 18, 2010

    Many articles often recommend that growers perform their own smal-scale tests for the specified procedures. Here are a few tips for conducting your own experiments.

  • Reducing greenhouse energy consumption

    Published on April 22, 2010

    This article outlines our multifaceted approach to improve the energy efficiency of greenhouse crop production, both in the short- and long-term.

  • Maximizing PGR spray applications

    Published on April 18, 2010

    Despite the availability of many different plant growth regulators, their spraying methods are generally similar. How can you get the most out of each application?

  • Rapid flowering of pansy

    Published on March 22, 2010

    Pansy has a unique photoperiodic flowering response. What can be done when varieties don’t flower uniformly or on time?

  • Energy-efficient annuals 12: Pentas & verbena

    Published on February 22, 2010

    Researchers from Michigan State University present research-based information for scheduling pentas and verbena in an energy-efficient and predictive manner. Part 12 of a 12-part series.

  • Height control for vegetable transplants

    Published on February 18, 2010

    A supplemental labeling of Sumagic for use on vegetable transplants in the U.S. has made height control less complicated. There are a few other methods that may be helpful, too.

  • Energy-efficient annuals 11: Angelonia & browallia

    Published on January 22, 2010

    Researchers from Michigan State University present research-based information for scheduling angelonia and browallia in an energy-efficient and predictive manner. Part 11 of a 12-part series.

  • Problems with petunia production?

    Published on December 22, 2009

    Petunias are among the most common spring crops in the garden center, but some persistent challenges can lower quality and cause serious headaches for growers.

  • Energy-efficient annuals 10: Vinca & wax begonia

    Published on December 22, 2009

    Researchers from Michigan State University present research-based information for scheduling vinca and wax begonia in an energy-efficient and predictive manner. Part 10 of a 12-part series.

  • Energy-efficient annuals 9: Dahlia & osteospermum

    Published on November 22, 2009

    Researchers from Michigan State University present research-based information for scheduling dahlia and osteospermum in an energy-efficient and predictive manner. Part 9 of a 12-part series.

  • Why use Virtual Grower?

    Published on October 17, 2009

    The Virtual Grower greenhouse simulation software translates your structure’s data and manipulates it to help calculate costs and make choices to be more energy efficient.

  • Energy-efficient annuals 8: Rudbeckia & viola

    Published on October 12, 2009

    Researchers from Michigan State University present research-based information for scheduling rudbeckia and viola in an energy-efficient and predictive manner. Part 8 of a 12-part series.

  • Energy-efficient annuals 7: Geraniums & zinnias

    Published on September 22, 2009

    Researchers from Michigan State University present research-based information for scheduling geranium and zinnia in an energy-efficient and predictive manner. Part 7 of a 12-part series.

  • Going beyond the surface

    Published on September 18, 2009

    In some cases, adding a surfactant to a plant growth regulator solution can improve the product’s efficacy and increase uptake. How can you know when to use these products?

  • Energy-efficient annuals 6: Petunias

    Published on August 22, 2009

    Researchers from Michigan State University present research-based information for scheduling petunia in an energy-efficient and predictive manner. Part 6 of a 12-part series.