Production
Technically Speaking: Air, Leaf and Root-Zone Temperature
Temperature is the primary factor that influences the rate of cell division, which is the driving force for plant development. The rate of development typically increases linearly as temperature increases from a crop’s base temperature... more »
New Model for Horticulture Extension Training Launches
Growers and technical staff in the greenhouse and controlled environment industry can gain a new qualification in plant health management with a collaboration from two online Extension training programs offered by the University of Florida... more »
Technically Speaking: Evaporative Cooling, Part 2: Maintenance
As discussed in the April 2022 issue of GPN magazine, there are two major types of evaporative cooling used in greenhouses: fan-and-pad or fog systems. The process of evaporation absorbs energy from the air, which... more »
Culture Report: Streptocarpus Ladyslippers
A class houseplant selection that has undergone a reinvention is the streptocarpus. First documented for commercial use in England in 1818 by the Kew Gardens plant collector James Bowie and native to South Africa, streptocarpus... more »
Blooming by Lamplight
Many greenhouse crops flower in response to day length and will only flower, or flower faster, when the proper photoperiod is provided. Photoperiodic crops are categorized as short-day plants (SDPs) or long-day plants (LDPs), where... more »
Leadership on LED Grow Lights
The benefits of using supplemental light for the propagation and production of greenhouse ornamental, vegetable and cannabis crops have been well documented by university researchers and commercial growers. Much of the research with ornamental crops... more »
Duets: Soluble Fertilizer Technology Continues to Advance
My guest today is Rick Vetanovetz, director of professional technical services at The Hawthorne Gardening Co. Rick has been in the horticulture industry since the 1970s, when he worked at a greenhouse-garden center. He earned... more »
Dr. Bugs — Insect and Mite Pests Feeding Behaviors and Plant Damage
Answer: The two major feeding behaviors of insect and mite pests of greenhouse-grown horticultural crops are chewing and piercing-sucking. Insects with chewing mouthparts consume portions of leaves, flowers, roots, or entire plant parts by ingesting... more »
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