February 3, 2018
How to Measure Greenhouse Light With Quantum Meters
In part three of this five-part series about the tools you need to keep track of your greenhouse environment, learn how to effectively use quantum sensors to monitor how much light your plants need for optimal growth.
January 12, 2018
How pH and EC Monitoring Can Help You Manage Nutrition in the Greenhouse
In part two of this five-part series about the tools you need to keep track of your greenhouse environment, learn about the various methods for tracking pH and EC.
December 9, 2017
Infrared Thermometers for Monitoring Plant and Substrate Temperatures
Growers use many tools to monitor the greenhouse environment. Learn about the best practices for using an infrared thermometer to measuring plant temperature.
March 29, 2017
How You Can Embrace Greenhouse Food Production With Confidence
Maintaining balance, learning continuously, and seeking support will help make your transition into producing greenhouse food crops a smooth one.
March 26, 2014
Producing Hydroponic Culinary Herbs
Switching over to tomato, cucumber or pepper production can be a big change for any greenhouse. These crops have long production cycles and may not fit as easily into windows of opportunity between ornamental production cycles. However, culinary herbs are a relatively quick and can easily be grown in simple hydroponic systems.
September 12, 2012
Produce High-Quality Rooted Cuttings
Whether you are a propagation specialist or are rooting cuttings for your own in-house production, the goals of propagators are the same — to efficiently produce high-quality rooted cuttings. In order to meet the spring and early summer market dates for flowering bedding plants, cuttings are typically rooted in mid- to late-winter and early spring when the outdoor daily light integrals (DLIs) are at seasonally low levels. The DLI inside a greenhouse is often further reduced as a result of glazing material and interior structures, as well as hanging baskets suspended above benches to maximize production space. Research has recently shed some light on the impact of light levels during propagation of New Guinea impatiens and petunias. However, the number of species and cultivars grown from cuttings is quite large and diverse. Therefore, we wanted to better understand the impact of DLI during propagation on growth and quality of several […]
September 12, 2012
Reduce Flowering Time
This is the second article in a two-part series looking at the effects of light during cutting propagation. While the first article focused on the effects of daily light integral (DLI) during propagation of rooted cuttings, this article will focus on finished plants. We wanted to see how DLI during propagation affected growth and flowering after transplant, as well as identify how the DLI during propagation interacted with the DLI during finishing to influence crop timing and quality. Study 1: Lighting During Propagation Cuttings of Angelonia ‘AngelFace White,’ Nemesia ‘Aromatica Royal,’ Osteospermum ‘Voltage Yellow,’ and Verbena ‘Aztec Violet’ were stuck in 105-cell trays and placed in a propagation greenhouse with an air and substrate temperature set point of 73°F and the average DLI was maintained at about 5 mol•m¯²•d¯¹. After seven days, cuttings were placed under a range of DLIs, from 1.2 to 12.3 mol•m¯²•d¯¹, achieved using supplemental light from […]
August 14, 2012
When Fertilizing, Don’t Neglect The Root Zone
Bedding and potted plants are traditionally fertilized daily or several times a week with water soluble fertilizer (WSF) applied in the irrigation water. With WSF, the fertilizer components are in a form that can be directly absorbed by the plant. This also means the fertilizer components can immediately impact the soluble salts and the pH of the substrate. WSF are also in a form that can readily be leached from the root zone. When using controlled-release fertilizers (CRF) the nutrients are primarily held within the CRF prills and are not available for plant absorption until they are released slowly over time. Thus, when a CRF is added to the substrate, its effects on pH and salts are not immediate. Instead, they occur slowly over time as nutrients diffuse from the prills. Use the results from three studies to better manage the root-zone pH and electrical conductivity (EC) when using CRFs. […]
July 18, 2012
High Tunnels: Grow Better Bedding Plants In Cold Weather
Bedding production begins in mid- to late-winter and early spring in the northern half of the U.S., when outdoor air temperatures and light are at seasonally low levels. During this time, greenhouses must be heated to maintain desirable production temperatures. The costs involved can be huge. Energy for heating in northern climates accounts for 10 to 30 percent of the total operating costs of commercial greenhouses. So it makes sense to find alternative strategies. Our research shows that high tunnels are a viable alternative for plant producers. High tunnels are an unheated polyhouse or hoop house covered with a single layer of plastic, although a double layer of plastic or additional covering inside may be used. In floriculture, high tunnels are most commonly used in cut-flower production for season extension and protection against frost, rain and wind. They are also used to produce and overwinter containerized herbaceous and woody perennials. […]
January 6, 2012
Height Control For Easter Lilies
Flurprimidol drenches have been shown to successfully control height of oriental lilies and Dutch bulbs such as hyacinth, narcissus and tulips, but there is no data that shows how effective flurprimidol drenches are on Easter lilies. Researchers decided to find out.
July 25, 2011
Graphical Tracking: The Basics Of Monitoring
Figure 2. Long, thin and weak poinsettia stems due to tight spacing (shade avoidance response) on the greenhouse bench. Scroll down to see the rest of the figures for this story. Controlling height is a major challenge for growers with most floriculture crops. Unfortunately, not only do environmental growing conditions vary from year to year due to the weather, but growers must continuously adjust their height management strategies due to the introduction of new cultivars, shipping dates and container sizes. We are all aware of the consequences of crops that do not meet or exceed maximum height requirements: poor quality and damaged plants, higher shipping and labor costs and, ultimately, shrink. So how do you make decisions related to height control in your greenhouse? Relying on your plant growth regulator (PGR) crop notes from last year may not be the best strategy to follow. The first step in making educated […]
June 14, 2011
Monitoring The Greenhouse Environment
How do you make decisions related to crop production in your greenhouse? The most common decision-making aids are notes made during previous production seasons and reacting to problems that arise. While using notes and reacting to situations as they arise are commonplace, each season and year is going to be different than the previous one. The first step toward making educated decisions and avoiding problems is to monitor factors that affect your crop production. Constant monitoring can help growers make decisions and help manage the causes of problems as opposed to treating symptoms. This is the first article in a series focused on monitoring the greenhouse environment, plant growth and development, substrate pH and EC and water quality, and greenhouse pests and diseases. These articles will provide concepts and ideas to help you develop a comprehensive greenhouse monitoring program. This particular article will focus on monitoring the greenhouse environment. Because […]
October 26, 2010
Non-Chemical Height Control
[imageviewer] As part of the movement toward sustainable production of greenhouse crops, many growers are looking for non-chemical alternatives to control plant height and size. Fortunately, there are numerous options available. These options include genetic selection, planning and graphical tracking, environmental manipulation of light quality and air temperature, cultural manipulation of irrigation and mineral nutrition and mechanical control. Genetic Selection When trying to control plant size, the first step is to select naturally compact or dwarf cultivars. Many breeding companies are constantly introducing new cultivars of popular genera and species with a more compact growth habit (Figure 1). This benefits growers by providing them with plant material that can be finished at a smaller size than their standard-sized counterparts. Planning & Graphical Tracking After selecting the proper genetics for production, the next step in controlling crop height is to put your pen to the paper (or finger to the keyboard!) […]
February 22, 2018
Plant Breeders Emphasize Importance of Patent Protectio…
According to members of MarkWatch, plant patents are an important protection for plant breeders and also provide an incentive for them to invest the time and money to innovate and develop new plant varieties.
February 20, 2018
Thrips Causing Headaches? New Research Shows Bio-based …
Dr. Rose Buitenhuis will present practical knowledge for growers to implement immediately during Biocontrols West Conference in San Diego, March 7-9.
February 20, 2018
12 New Poinsettias and Succulents for Holiday Sales, Cr…
Poinsettias and succulents are both in-demand products with today’s consumers. Here’s a look at some of the newer introductions available for retail sales in 2018 and 2019.
February 20, 2018
Top 100 Growers Survey for 2018 Is Now Open!
Operations with more than 400,000 square feet of environmentally controlled production are eligible to take the survey, which provides valuable market knowledge on how the nation's largest growers are innovating, sourcing labor, keeping up with demand, and setting trends.
February 19, 2018
All-America Selections Names Latest Variety Winner, Ann…
All-America Selections (AAS), the 85-year-young non-profit plant trialing organization, had a very busy month of January.
February 17, 2018
Gotham Greens Building Second Greenhouse in Suburban Ch…
The new $12.5 million, 105,000-square-foot greenhouse will be near the company’s first Chicago greenhouse, and will be a free-standing structure.
February 15, 2018
Boxwood Blight, Seed Your Future Among Topics Receiving…
The Horticultural Research Institute recently announced the 10 research projects that will receive funding in 2018 to investigate challenges and solutions in production, pest management, environmental stewardship, and business and marketing.
February 14, 2018
Spring Meadow Nursery Furthers Its Mission of Giving Ba…
The Spring Meadow-Proven Winners Endowment Fund through the Horticultural Research Institute has now topped $800,000, with more scholarships coming in 2018.
February 13, 2018
Don’t Let Your New Year’s Resolutions Fade …
Stuff got real in 2017, and it caused many of us to stop and reflect on the current state of the world, and how we can impact change — or at least improve our own situations. Life is too short, and we work too hard, to not use the annual renewal as an opportunity to take stock of our own personal lives, businesses, and careers, and make the necessary adjustments that will allow us to work smarter and live better. Even if you have already given up on your resolutions, perhaps you can think of January as a trial month and make February the month when you really get to work on your goals. And while I know it’s a difficult month to start on some of these changes, since you’re already immersed in the busy spring season, I promise that if you take some time to evaluate your reality […]
February 12, 2018
Calling All Designers: Enter the International Plantsca…
Applications are being accepted through April 13 for AmericanHort’s International Plantscape Awards, which recognize achievements in interior plantscape design, installation, creativity, renovation, and innovation.
February 11, 2018
Bayer Has New Turf and Ornamentals Global Market Manage…
Jose Milan will be focused on helping growers deal with regulatory issues, while promoting the environmental benefits the ornamentals industry offers.
February 10, 2018
Applications for Dümmen Orange’s Dr. P. Allen Hammer Sc…
Named for Dr. P. Allen Hammer in acknowledgment of the contributions he has made to the floriculture industry, the scholarship is intended to extend Dr. Hammer’s legacy by supporting the next generation of floriculture students.
February 9, 2018
Garden Retailers at TPIE Highlight Their Favorite Produ…
A team of garden retailers once again participated in the 2018 Tropical Plants Industry Expo Cool Product Awards.
February 8, 2018
Who Will Be Our 2018 Head Grower of the Year and Operat…
The deadline for submitting nominations is fast approaching, so be sure to let us know who you feel is most deserving of these awards!
February 8, 2018
Learn the Basics of Biocontrols for Controlled Environm…
Growers producing crops in protected structures, including ornamentals, vegetable crops, and cannabis, can learn about effective sanitation, banker plants, and buying and using beneficials and predatory insects at the Biocontrols USA West Conference in San Diego, March 3-7.