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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  • Energy-efficient poinsettia production

    Published on August 8, 2009

    As fuel prices continue to soar, finding ways to limit energy consumption in the production process of poinsettia has never been more important.

  • Energy-efficient annuals 5: Ageratum & cosmos

    Published on July 22, 2009

    Researchers from Michigan State University present research-based information for scheduling ageratum and cosmos in an energy-efficient and predictive manner. Part 5 of a 12-part series.

  • Grow warm or grow cool?

    Published on July 17, 2009

    Using the Virtual Grower computer software is one way to determine how to get the best results at certain greenhouse growing temperatures.

  • Energy-efficient annuals 4: Dianthus & snapdragon

    Published on June 22, 2009

    Researchers from Michigan State University present research-based information for scheduling dianthus and snapdragon in an energy-efficient and predictive manner. Part 4 of a 12-part series.

  • Energy-efficient annuals 3: Marigolds

    Published on May 22, 2009

    Researchers from Michigan State University present research-based information for scheduling marigold in an energy-efficient and predictive manner. Part 3 of a 12-part series.

  • Energy-efficient annuals 2: Scheduling bedding plants

    Published on April 22, 2009

    Greenhouse temperature influences plant development and energy consumption for heating. When producing a crop, delivery of low temperatures may actually be more energy intensive than warmer temperatures.

  • Controlling height with temperature drops

    Published on April 17, 2009

    Temperature drop is the practice of lowering the temperature, typically by 5-15 degrees F, before sunrise. Generally, the greater the magnitude of the temperature drop, the stronger it suppresses plant height.

  • Brushing plants for height control

    Published on February 18, 2009

    “Brushing” plants is proving to be a promising, albeit unconventional, height control technique. When touched or moved, plants release ethylene, which can inhibit elongation.

  • Calculating ADT (average daily temperature)

    Published on December 17, 2008

    Average daily temperature is a crucial factor in crop time and plant development. Learn to calculate it and how it affects your growing schedule.

  • The ABCs of PGRs

    Published on November 18, 2008

    There are now a large number of plant growth regulators registered for use on ornamental plants. This article discusses the various active ingredients and the product names for each.

  • Getting results with liner dip

    Published on November 18, 2008

    In this article, we provide four keys to successful use of using plant growth regulators as liner (or plug) dips.

  • Comparing PGRs

    Published on October 18, 2008

    Plant growth retardants (PGRs) are often used by commercial growers to produce a more compact, higher quality ornamental plant. This article compares the efficacy of different products with the same active ingredient.

  • Improving branching and postharvest quality

    Published on August 7, 2008

    When used properly, benzyladenine (BA) sprays have commercial potential, and can increase the number of tertiary shoots in poinsettia and delay lower-leaf yellowing (chlorosis).

  • Production tips for top performers: Penstemon

    Published on June 29, 2008

    Commercial production information, based on research at Michigan State University, is presented on several cultivars of the herbaceous perennial Penstemon (common name: beardtongues).

  • PGRs on perennials

    Published on June 18, 2008

    Learn how to choose the right plant growth regulator (PGR) and application method for commercial production of herbaceous perennial crops.

  • Overcoming New Guinea impatiens stall

    Published on February 29, 2008

    New Guinea impatiens can be significantly cooler than the air temperature when the greenhouse humidity is low and the glazing temperature is low.

  • Responses to temperature & light

    Published on January 29, 2008

    Longer growing time at cooler temperatures or shorter growing time with warmer temperatures? That question is addressed for annual bedding plants in this article.

  • Increasing poinsettia size

    Published on October 18, 2007

    Are your potted poinsettias vertically challenged? When applied on young stems before the first hint of color, chemicals can help promote stem extension and take your plants to new heights.

  • Vernalizing perennials

    Published on September 29, 2007

    For some cold-hardy perennials, a cold treatment (vernalization) is the key to initiate flowering. Here are tips for successful cold treatments of herbaceous perennials.

  • Propagating poinsettias

    Published on August 19, 2007

    Poinsettia propagation can be challenging, especially during the summer. Here are some tips to help ensure successful propagation of nonrooted poinsettia cuttings.

  • Graphical tracking

    Published on July 18, 2007

    Graphical tracking, a decision-support tool, can help growers monitor plant height throughout production and identify when plants are too tall or too short.

  • Evaluating new Echinacea cultivars

    Published on June 29, 2007

    Research-based production information, generated at Michigan State University, is provided on about 20 cultivars of the herbaceous perennial Echinacea.

  • A new approach for floriculture

    Published on June 19, 2007

    Research on cuttings conducted by a cooperative group of academics looks at the essential factors that determine the success or failure of cuttings.

  • Grouping crops can save you money

    Published on June 11, 2007

    By grouping crops according to certain variables, you can increase greenhouse production efficiency and reduce the number of problems encountered.

  • PGR drench guidelines

    Published on April 18, 2007

    A drench of a plant growth regulator (PGR) is an application of a relatively large volume of solution at a low concentration to the growing media. Learn more about which chemicals are appropriate for drenches, as well as suggested volumes and rates.

  • New directions for scheduling bedding plants

    Published on March 29, 2007

    Many factors affect flowering times. Researchers at the University of Minnesota and Michigan State University are developing ways growers can use those factors to flower their crops at specific times.

  • Using +DIF to lower fuel costs

    Published on February 17, 2007

    As energy costs continue to be a concern, consider growing crops at a warm day temperature and a cool night temperature to help reduce fuel costs.

  • Manage temperatures for the best spring crops

    Published on January 17, 2007

    Given the high cost of greenhouse heating, many growers are lowering the temperature set points. While there are some advantages to lowering the thermostat, some negative consequences can arise.

  • ZZ plant is an excellent choice for tough indoor use

    Published on January 8, 2007

    ZZ plant (Zamioculcas zamiifolia) is a popular indoor plant because of its glossy, dark-green foliage, limited disease and insect problems, and performance under low light and restricted water availability.

  • How to manage stock plants

    Published on December 19, 2006

    The quality of a stock plant has a direct effect on the quality and number of cuttings that can be harvested. Poor stock plants yield poor cuttings, which can lead to nonuniform and low-quality finished plants.

  • Avoiding ethylene problems

    Published on October 17, 2006

    Recognizing ethylene symptoms and knowing how to test for its presence will help minimize greenhouse production problems.

  • Know your application techniques

    Published on August 18, 2006

    Be sure to select the proper plant growth regulator application technique to achieve your desired crop size.

  • Improving perennial flower (Vernalization part 5)

    Published on June 29, 2006

    In part 5 of a 5-part series of articles on vernalization of herbaceous perennials, this article discusses plants in which a cold treatment accelerates or improves flowering, but is not necessarily required for flowering.

  • Life after cold! (Vernalization part 4)

    Published on May 29, 2006

    In part 4 of a 5-part series of articles on vernalization of herbaceous perennials, this article discusses plants in which a cold treatment and subsequent long photoperiods are needed for rapid and uniform flowering.

  • Day-neutral vernalization (Vernalization part 3)

    Published on March 29, 2006

    In part 3 of a 5-part series of articles on vernalization of herbaceous perennials, this article discusses plants in which flowering is triggered by a cold treatment but not by photoperiod (or day length).

  • Cool Campanula

    Published on October 29, 2005

    This article presents research-based information on the production of a wide variety of campanula as potted flowering plants, including responses to vernalization (cold) treatments and photoperiod (day length).

  • Coreopsis: A great all-American genus

    Published on July 29, 2005

    Commercial production information, based on research at Michigan State University, is presented on two 'Limerock' cultivars of the tender herbaceous perennial Coreopsis (common name: tickseed).

  • Managing light during propagation

    Published on June 24, 2005

    Michigan State University research examines how environmental factors - especially light - influence the rooting and growth of vegetative annual cuttings.

  • Sumagic on bedding plants

    Published on April 18, 2005

    Usage of this highly active plant growth regulator (active ingredient: uniconazole) on bedding plants is for the experienced commercial grower. Read how to use it, when it’s best used, and how much is recommended based on this MSU research.

  • Quick-cropping perennials

    Published on September 29, 2004

    Research-based information is provided to commercially produce a variety of herbaceous perennials in flower, in a relatively short period of time.