February 9, 2017
Bulking and Height Control of Purple Fountain Grass With Plant Growth Regulators
In the second article of a two-part series, researchers discuss methods for using plant growth regulators to bulk purple fountain grass and regulate its height.
January 5, 2017
Successful Propagation of Purple Fountain Grass From Single-Internode Culm Cuttings
In the first article of a two-part series, researchers discuss how propagation daily light integral and root-zone temperature influence root growth and development of single-internode purple fountain grass culm cuttings.
November 4, 2016
Evaluating Greenhouse Supplemental Lighting For Young And Finished Plant Production
Researchers at Purdue and Michigan State University compare young and finished plant production under LED toplighting and HPS lamps to determine which source is most effective.
October 3, 2016
Perennial Propagators’ Successes And Challenges: Results Of A National Survey
A survey by researchers from Purdue University and Michigan State University report the hurdles growers face when propagating perennials, and the practices they use to root them successfully.
November 18, 2015
Using Bench Top Heating With Reduced Air Temperature During Poinsettia Cold Finish
Researchers determine if bench-top root-zone heating in combination with reduced air temperatures is an effective method for poinsettia cold finishing.
September 23, 2015
MSU Offers New Greenhouse Lighting Online Course For Growers
Michigan State University Extension is now offering a non-credit, pre-recorded online course on greenhouse and horticultural lighting. The lighting course is intended for greenhouse and ornamental plant growers and others interested learning about the fundamental concepts about how plants respond to light quality, quantity and in duration. It provides introductory to moderately-challenging content primarily based on experiments performed at Michigan State and Purdue Universities. This is the second course in the College of Knowledge Online series offered on the national Extension website. The first course was Floriculture Root Zone Management, also available online. What Growers Will Learn From Taking This Course The 3-hours of pre-recorded lecture and video demonstrations are divided into seven units. The first and second units cover the properties of light and its importance for plant growth and development. The third unit discusses how light quality influences stem extension and flowering. The fourth unit of the course teaches […]
September 22, 2015
Sole-Source Lighting In Horticulture: Bedding Plant Plug Production
Researchers determine how sole-source LED lighting can be used effectively for the production of bedding plant seedlings.
August 21, 2015
Sole-Source LED Lighting In Horticulture: Microgreens Production
In Part 3 of a four-part lighting series highlighting the multiple uses of light-emitting diodes (LEDs), researchers examine the effects of sole-source LED lighting on microgreen production to achieve the highest quality crop possible in an energy efficient manner.
August 14, 2015
Customizing Crop Foliage Color With LEDs: Ornamental Crops
Do you find that your purple fountain grass (Pennisetum setaceum ‘Rubrum’) crop is often green to light purple? What if we told you there is a quick solution to enhance and darken the foliage of purple fountain grass or other floriculture crops? In this second article of a four-part series highlighting the multiple uses of high-intensity light-emitting diodes (LEDs), we will discuss our research methodology and findings for enhancing the foliage color of ornamental crops with end-of-production (EOP) supplemental lighting (SL) in the greenhouse. Many ornamental crops that greenhouse and nursery growers produce vary in size, shape and color. These variables are often influenced by the growing environment. For example, leaf color (intensity, distribution or both) of ornamental crops such as purple fountain grass is a key component that often influences the consumer’s perception and ultimately an impulse purchase. The red or purple pigmentation of purple fountain grass leaves is […]
June 29, 2015
Customizing Crop Foliage Color With LEDs: Red Leaf Lettuce
In the first of a four-part series highlighting the multiple uses of light-emitting diodes (LEDs), researchers share how end-of-production supplemental lighting with LEDs enhances red leaf lettuce color prior to harvesting and shipping.
July 29, 2014
Bench-Top Root Zone Heating: Can You Reduce Air Temperatures And Finish Bedding Plants On Time?
This is the second article in a two-part series featuring research from Purdue University that focuses on energy-efficient production strategies for annual bedding plants.
June 6, 2014
High Tunnels: Reduce Heating Costs While Improving Bedding Plant Quality [Slideshow]
This is the first article in a two-part series featuring research from Purdue University that focuses on energy-efficient production of cold-tolerant bedding plants.
January 29, 2014
Basics & Beyond: Cold Finishing Poinsettias
Reducing temperatures during finishing (RTF) can reduce energy and input costs when producing poinsettias. Check out research from Purdue University and University of New Hampshire on how RTF influenced plant height, bract area index and time to marketability and first pollen shed.
November 14, 2013
The Basics & Beyond: Understanding The Differences Between Photoperiodic And Supplemental Lighting
As I talk to growers around the country, I often find that there is confusion between (1) photoperiodic lighting used to create a long day for flower induction of long-day plants and (2) supplemental lighting used to increase the total quantity of photosynthetic light received over the course of the day, which is referred to as daily light integral (DLI) in the greenhouse. For more information on DLI, please visit http://bit.ly/11x79eK To add to the confusion, supplemental lighting is sometimes referred to as photosynthetic or assimilation lighting. In this article, I will attempt to clarify the differences to assist you in selecting the appropriate lighting strategy for your greenhouse crops. Understanding Photoperiodic Lighting The number of hours of light in a 24-hour period (photoperiod) controls flowering of both short-day and long-day crops. It is actually the uninterrupted period of darkness that controls flowering responses. Long-day plants are those that only flower […]
November 14, 2013
Comparing LED Lighting To HPS Lamps For Plug Production
Research at Purdue University is determining how LEDs, providing light of different wavelengths, compare to traditional high-pressure sodium lamps.
September 13, 2013
Comparing LED Lighting To High-Pressure Sodium Lamps
Cuttings of vegetatively propagated bedding plants are frequently rooted in late winter and early spring to meet the spring and early summer market demand for flowering bedding plants. However, this is also the time when dirty and old glazing material, interior superstructures, and hanging baskets suspended above benches reduce already seasonally low ambient outdoor daily light integrals (DLIs) inside the greenhouse. Increasing the DLI during propagation has been shown to improve growth and quality of rooted cuttings, as well as reduce time to flower after transplanting. While maintaining clean glazing material, minimizing superstructure and reducing the density of hanging baskets may increase greenhouse DLI, the only way to appreciably increase DLI is to provide supplemental or photosynthetic lighting. Light-emitting diodes (LEDs) are solid-state, semi-conducting diodes that can emit light from ~250 nm to ≥1000 nm. There are several features of LEDs that make them attractive alternatives to high-pressure sodium (HPS) […]
April 19, 2013
DLICALC Online Tool Helps Growers Caculate Daily Light Integral
Managing all the different environmental and cultural aspects of greenhouse crop production can be an intimidating and daunting task, especially during the peak production season. But it’s necessary to produce a high-quality, salable plant. The greenhouse is full of moving targets, from root zone pH and EC to plant growth, air temperature and light. Managing each of the parameters of greenhouse crop production to consistently produce quality crops on time can be a challenge. Thankfully, the development of decision-support tools can aid greenhouse growers. GROCALC is a suite of electronic grower decision support tools that include ALKCALC, FERTCALC and PGRCALC. These programs are useful for making calculations related to greenhouse crop culture including water acidification requirements, fertilizer solution and plant growth regulator (PGR) mixing. However, there are few or no tools available to help make calculations related to the greenhouse light environment. Although light is frequently discussed in terms of […]
April 3, 2013
Using Parboiled Rice Hulls In Substrates to Finish Greenhouse Crops
Have you considered replacing perlite with whole parboiled rice hulls (PBH) or peat with ground PBH in your growing substrate for finishing spring bedding plants, but are not convinced they are an effective substrate component? Alternative substrates are a hot topic, as many growers are looking for more sustainable growing mixes, lower production costs and superior performance. However, alternative substrate components do not have the history and popularity that peat moss or perlite may enjoy. In the April issue of Greenhouse Grower, we shared the results of our work propagating New Guinea impatiens cuttings in substrates containing whole or ground PBH as replacements for perlite or peat moss, respectively. In this second article of the two-part series, we will share our most recent research examining how whole and ground PBH work for finishing seed-propagated bedding plants in the northern U.S. How The Study Was Conducted At Purdue University (40 […]
July 22, 2017
Craig Regelbrugge: Proposed Budget Cuts Could Eliminate…
President Trump’s proposed budget for the 2018 fiscal year includes significant cuts to the Agricultural Research Service, which supports the Floriculture and Nursery Research Initiative.
July 21, 2017
New Products Zone at Cultivate’17 Features Goods …
The New Products zone is always a popular exhibit at Cultivate’17. Here’s a sampling of some of the many items on display that could make growing easier than ever before.
July 20, 2017
Highlights from Greenhouse Grower’s Evening Of Excellen…
Greenhouse Grower held its annual Evening of Excellence event on Monday, July 17, during Cultivate’17. The Greenhouse Grower Evening Of Excellence awards reception celebrates greenhouse operations and plant breeders that strive for excellence, and as to be expected, there was much of that to be found during the event.
July 20, 2017
Terra Nova Nurseries, Dümmen Orange to Partner on Unroo…
Terra Nova Nurseries has contracted with Dümmen Orange to produce unrooted cuttings (URCs) from Terra Nova private stock located at Dümmen Orange’s Central America facilities. The URCs will fulfill orders in North America and Europe.
July 20, 2017
Nine Practices for Positive Leadership That Drive Chang…
Cultivate’17 keynote speaker Jon Gordon encouraged leaders to keep moving forward and confront negativity to create a cohesive, committed team.
July 20, 2017
New Perennials, Trial Gardens, and Merchandising Were H…
Darwin Perennials Day has steadily become one of the must-attend perennial events of the summer. This year, even the weather cooperated.
July 20, 2017
Luxflora Attracted Even More Participation to its Secon…
More than 170 runners kicked off Cultivate'16 on Sunday, July 16, with Luxflora's second annual 5k race. It was a great way to start the week, participants said.
July 19, 2017
New Videos Highlight Grower Experiences in Shifting to …
Fluence Bioengineering recently produced two videos in which growers in the U.S. and overseas describe why they switched lighting systems.
July 18, 2017
Florida’s Nursery and Greenhouse Industry Has a Huge Ef…
A new economic impact study from the University of Florida says the green industry contributes more than $21 billion in sales and 230,000 jobs to the Sunshine State’s economy.
July 18, 2017
Aron Hoff of Meyers Fruit Farms and Greenhouses Named H…
"Everyone on my team is an inspiration, and this award is a testament to what they've done in challenging me to always do better," said Hoff in accepting the award, which was presented during Greenhouse Grower’s Evening of Excellence program.
July 18, 2017
Micandy Gardens Greenhouses Named Operation of the Year…
"Our team works with passion and has a common goal and purpose: to share the beauty of plants and nature with the world," said Micandy Gardens President Marcelyn Buist-Byl in accepting the award, which was presented during Greenhouse Grower’s Evening of Excellence program.
July 17, 2017
Greenhouse Grower Honors 2017 Medal of Excellence Breed…
Greenhouse Grower’s Evening of Excellence at Cultivate’17 was a celebration of the 2017 Medal of Excellence Winners that embody the best in breeding, marketing, and growing, and typify the dedication to quality that is so prevalent in our industry. Check out who the big winners were.
July 17, 2017
Ball Seed’s 2018 New Varieties Catalog Now Available
The expanded guide includes breakthrough breeding from Ball in annuals, perennials, vegetables, potted plants, and more.
July 16, 2017
Pleasant View Gardens, D.S. Cole Growers Hosting Open H…
The event gives horticulture industry professionals the chance to check out nearly 80 new introductions from Proven Winners, as well as Pleasant View’s new Savor Edibles & Fragrants line.
July 15, 2017
National Garden Bureau Announces Featured Plants for it…
Plant classes recognized include bulb crops (tulip), annuals (calibrachoa), vegetables/edibles (beet), and perennials (coreopsis).
July 14, 2017
Danziger Hosts Indian Prime Minister, Demonstrates Inno…
When Indian Prime Minister Narendra Modi landed in Israel July 4 with his delegation to explore possible cooperation with Israel, the group’s first stop was the Danziger facility at Mishmar Hashiva’a.
July 13, 2017
20 Things You Need to Know Before You Head to Cultivate…
Whether you are a first-time Cultivate attendee or a seasoned veteran, it’s important to be prepared before you make the trip to Columbus, OH, for one of the floriculture industry’s largest events. Before you leave, here are 20 things to plan ahead for prior to departing.
July 12, 2017
All-America Selections Celebrates Milestone Anniversary…
Coinciding with its 85th anniversary celebration, AAS is hosting an open house at its new offices, and has also released its annual report.