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Floriculture & Greenhouse Crop Production

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  • Purpling of leaves

    Published on January 8, 2021
    There are many specialty crops that naturally have red, purple or almost black foliage, while others turn those colors when conditions are unfavorable. This article briefly reviews the factors that influence the purpling of leaves.

  • How to produce poor-quality floriculture crops

    Published on September 11, 2020
    Sometimes growers unknowingly follow practices that can contribute to, or directly cause, a reduction in crop quality. While there can be some tradeoffs between crop quality and crop timing and/or input costs, these practices should be avoided.

  • A little far-red light goes a long way

    Published on May 3, 2019
    Part 4 of a 5-part series presents information on how a relatively low intensity of far-red light influences seedlings grown in fully controlled, indoor environments.

  • LEDs: Blue & far-red light

    Published on April 10, 2019
    Part 3 of a 5-part series summarizes results from an indoor lighting experiment with floriculture crop seedlings, where we determined whether blue light could nullify the effects of far red on stem elongation, without inhibiting flowering.

  • Lower leaf chlorosis, spotting, and necrosis of New Guinea impatiens induced by low substrate pH

    Published on May 4, 2018
    New Guinea impatiens grown in substrates below the optimal pH range of 5.8 to 6.4 may exhibit lower leaf chlorosis (yellowing), interveinal chlorosis, red-to-black spotting along leaf margins and between veins, and marginal necrosis of the lower foliage.

  • Using Data Loggers in the Greenhouse

    Published on April 6, 2018
    Most growers do not have extensive environmental control systems that keep historical records of the greenhouse conditions. In these cases, you will find that using a data logger will allow you to easily see past and present environmental data.

  • Causes of flower bud abortion

    Published on March 14, 2018
    There are many potential causes to flower bud abortion, including pests, environmental factors, and cultural factors.

  • Keeping in Front of the Curve: pH and EC Monitoring

    Published on January 12, 2018
    In-house monitoring of the growing substrate pH and EC will help to avoid nutrient disorders and shrinkage. Setting up a monitoring system is easy and the steps are highlighted in this article.

  • Producing High Quality Plugs Part I

    Published on September 4, 2017
    In this article, we will discuss how continuous 16-hour or instantaneous threshold supplemental lighting from HPS lamps and LEDs and photoperiodic lighting influence plug quality and subsequent flowering.

  • Growing degree-day accumulations around Michigan

    Published on August 16, 2017
    Use MSU Enviroweather to determine whether heat units where you are located are behind, ahead or even as compared to normal.

  • Bedding plants with high base temperatures

    Published on December 14, 2016
    In the late winter and spring, many greenhouse growers produce a wide variety of species and cultivars, many of which are annual bedding plants. Crops can have different growing and flowering requirements, so plants shouldn’t all be grown the same way.

  • High tunnel and outdoor production of bedding plants

    Published on November 17, 2016
    As greenhouse space becomes limited in the spring, you may consider using outdoor spaces and high tunnels. Read on for insight into the benefits and risks associated with these growing strategies.

  • High tunnel and outdoor production of cold-tolerant bedding plants

    Published on November 10, 2016
    As greenhouse space becomes limited in the spring, you may consider using outdoor spaces and high tunnels. Read on for insight into the benefits and risks associated with these growing strategies.

  • Increasing plant quality is a focus of 2016 Greenhouse Growers Expo

    Published on November 2, 2016
    Eight sessions at Greenhouse Growers Expo focus on maintaining and increasing plant quality including successful rooting of cuttings, disease and pest management, and plant disorder diagnostics.

  • Crops with relatively low optimum temperatures

    Published on May 17, 2015
    At temperatures above the optimum, plants experience stress and the rate of development begins to decrease. Learn which crops grow best at relatively cool temperatures.

  • Growing your crops above their base temperature

    Published on November 17, 2014
    Is lowering temperature set points in the greenhouse the best option for you to combat rising heating costs?

  • Cold-intermediate bedding plants

    Published on February 22, 2014
    Bedding plants that stop developing at moderately low temperatures can be labeled as cold-intermediate plants. This categorization is based on estimates of base temperatures derived from research data primarily generated at Michigan State University.

  • Cold-tolerant bedding plants

    Published on January 22, 2014
    Bedding plants that stop developing at low temperatures can be labeled as cold-tolerant plants. This categorization is based on estimates of base temperatures derived from research data primarily generated at Michigan State University.

  • Cold-sensitive bedding plants

    Published on December 22, 2013
    Bedding plants that stop developing at a relatively high temperature can be labeled as cold-sensitive plants. This categorization is based on estimates of base temperatures derived from research data primarily generated at Michigan State University.

  • Flowering of petunia at low temperatures

    Published on November 22, 2013
    Temperature and photoperiod interact to influence flowering of petunia. This article presents research-based information to better understand how to manipulate the environment for rapid flowering.