January 24, 2011
Silicon In Floriculture Fertility Programs: Ready Research Results
Silicon (Si) is not considered an essential plant nutrient because most plant species can complete their lifecycle without it. Still, some plant species can benefit from supplemental silicon in a variety of ways. Reports on dozens of ornamental species, including gerberas, roses, asters, New Guinea impatiens, zinnias, sunflowers, poinsettias and orchids, have begun to illustrate wider potential use for this poorly understood element. Beneficial effects reported include improved salt and drought tolerance during production and post-harvest environments; stronger, thicker stems in some cut flowers; and larger orchid liners. In this report, we highlight some positive responses we have observed with supplemental silicon in several species. Powdery Mildew in Zinnia, Phlox, Cucumber & Sunflower Powdery mildew species have a wide range of hosts, including many economically important to the greenhouse industry (e.g. gerbera, chrysanthemum, rose, verbena). Zinnia, phlox, cucumber and sunflower were supplied with 30 to 60 ppm Si (in the […]
March 23, 2009
Energy-Efficient Annuals: Scheduling Bedding Plants
Examples of software interface panels of Virtual Grower. This program can be downloaded free at VirtualGrower.net and can be used to estimate greenhouse energy costs throughout the United States. Desirable scheduling of garden plants includes producing a marketable crop for a specific date with the least amount of inputs as possible. A large contribution to input costs for greenhouse production are overhead expenses (often calculated on a cents-per-square-foot basis). During winter and early spring production, heating can be a large component of overhead costs, especially for growers in the North. As a result, some growers have lowered their growing temperature in an attempt to save on fuel costs. When greenhouse temperature is lowered, plants develop more slowly, so production time increases. The effect of temperature on crop timing depends on several factors, most notably on the crop grown. In this series of articles, we are presenting research-based information on the […]
June 12, 2008
Responses To Temperature & Light
Temperature and light are the two environmental factors that primarily influence production time and quality of both young and finish plants. Knowledge of how crops respond to changes in temperature and light can help growers predict crop timing in a variety of greenhouse environments. One of the questions we’ve been addressing is whether less energy is consumed for heating when growing crops cool but for a longer period of time, compared to growing crops relatively warm but in a shorter period of time. To answer this question, we first need to quantify how plants develop in response to temperature and light. We can then estimate the growing conditions in which the least amount of energy is consumed on a per-crop basis. Response To Light The total amount of photosynthetic light (daily light integral or DLI) that a plant receives can also influence plant development and quality. DLI describes the cumulative amount […]
March 20, 2018
Bell Nursery’s Gary Mangum Provides Insight on De…
In light of the March 14 announcement that Bell Nursery Holdings LLC had been acquired by Central Garden & Pet, Greenhouse Grower caught up with Bell Nursery CEO Gary Mangum to get the backstory on the deal. Here is our full interview with Mangum.
March 20, 2018
California Spring Trials 2018 Central Region Preview: B…
Check out this California Spring Trials 2018 Central Region preview of new varieties from Ball Horticultural Co., Dümmen Orange, PlantHaven International, and Suntory Flowers.
March 20, 2018
Survey Says: Poinsettia Prices, Sales, and Production I…
Traditional reds were still bestsellers, but interest continues to grow in white and novelty varieties. Greenhouse Grower’s annual survey provides an in-depth look at the holiday season.
March 20, 2018
Seed Your Future Dinner Celebrates Focus on New, Young …
During a Seed Your Future Leadership Meeting Fundraiser dinner at Longwood Gardens, Pennsylvania's Ag Secretary thanked the Seed Your Future initiative for its efforts to create awareness of horticulture and careers in horticulture.
March 19, 2018
Green Fuse Botanicals Expanding Distribution Network
The company’s expanded product line has created an opportunity to broaden its reach to the grower community through a wider range of brokers.
March 18, 2018
New Soil Amendment From Kemin Promotes More Efficient N…
Valena, a soil amendment sourced from a proprietary strain of Euglena gracilis (algae) rich in beta-glucan, is designed to support the growth of healthy and strong plants.
March 17, 2018
National Garden Bureau Once Again Bringing Garden Write…
The National Garden Bureau is again hitting the road for California Spring Trials (CAST) with influential garden communicators, with the goal of connecting breeders and brokers with consumers via these influencers with large followings.
March 14, 2018
Dramm Offering New Video Chat Option for Service Issues…
The Dramm Corporation recently introduced two new resources for its greenhouse grower customers to deal with indoor growing conditions.
March 14, 2018
Bell Nursery Acquired by Central Garden & Pet
Greenhouse Grower just learned that Bell Nursery, headquartered in Elkridge, MD, has been acquired by Central Garden & Pet Company, a leading innovator, producer, and distributor of branded and private label products for the lawn and garden and pet supplies markets.
March 13, 2018
California Spring Trials 2018 Northern Region Preview: …
Check out this California Spring Trials 2018 Northern Region preview of new varieties from Benary, Thompson & Morgan, American Takii, Sakata Seed, Beekenkamp, and Plug Connection.
March 12, 2018
Eason Horticultural Resources Adds to its National Sale…
Roger Kehoe joins the company as a Sales and Production Management Expert. He was most recently the Director of Young Plant Production at the Color Division of Costa Farms.
March 11, 2018
National Initiative for Consumer Horticulture Releases …
A new series of four #PlantsDoThat Inside infographics focuses on the multitude of ways indoor plants affect where we live, where we work, where we heal, and where we learn. The first two infographics are now available.
March 10, 2018
Segovis Fungicide Now Available to Ornamental Growers i…
Segovis, from Syngenta, features a unique active ingredient that helps control downy mildew and Phytophthora.