July 30, 2016
Select The Right Filter For Ebb-And-Flood Irrigation
This article is the fourth in a series of case studies designed to help growers Reduce, Remediate, and Recycle irrigation water as part of a multi-state research grant.
June 16, 2008
Understanding Plant Nutrition: Limestone and pH
In last month’s article, we stated that cation exchange capacity (CEC) does not play an important role in pH, calcium and magnesium buffering. The question should then be asked: Is growing in a soilless media similar to hydroponics when it comes to pH or nutritional management? Growing in a soilless root medium is not the same as growing with hydroponics because there are sources of buffering found in container media. One of the strongest buffers for long-term pH and nutritional management is limestone. In this article, we will focus on the effect limestone has on pH management by discussing why limestone needs to be added to a soilless media, and the difference between reactive and residual limestone. Figure 1. Particle size distribution of 29 lime materials and reagent grade CaCO3. Dry sieving method was used for carbonate liming samples (calcitic: C1-8, dolomitic: D1-17 and reagent grade CaCO3: R), whereas wet […]
June 10, 2008
Understanding Plant Nutrition: Limestone, Calcium And Magnesium
The reason for adding limestone to a container media, besides pH control, is to supply calcium and, depending on the limestone, magnesium. In this article, we will discuss the nutrient content of different types of limestone and how limestone influences calcium and magnesium nutrition. Limestone Nutrient Content There are four types of carbonate-based limestone that are available. Calcite is pure calcium carbonate (CaCO3, 40 percent Ca). Calcitic lime is composed of mostly CaCO3 (> 30 percent Ca) with some MgCO3 (<5 percent Mg). Dolomitic lime contains less CaCO3 (<30 percent Ca) and more MgCO3 (>5 percent) than calcitic lime. Finally, dolomite also contains CaCO3 and MgCO3, but at a specific ratio of 22 percent Ca to 13 percent Mg. Calcium hydroxide (Ca(OH)2), also known as hydrated lime, or calcium magnesium hydroxide (CaMg(OH)4), also known as dolomitic hydrated lime, are sometimes used as a fast reacting liming source because they will […]
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.
February 6, 2018
Biocontrol Track for Greenhouse Growers Reveals New Pro…
The Biocontrols West USA Conference in San Diego March 7-9 offers greenhouse growers practical knowledge on new research findings and an energetic presentation from a grower who’s taking her customers along on her biocontrols journey.
February 6, 2018
Congressional Action Days to Feature Pep Talk From Lead…
Rep. Jimmy Panetta, (D, CA), one of the floral industry’s biggest advocates in Congress, will deliver a pep talk to the Society of American Florists’ (SAF) Congressional Action Days participants before they meet with lawmakers on Capitol Hill.
February 6, 2018
20 Trends That Dominated at TPIE
If you're looking to stay on top of the current trends to stay ahead of the competition and increase value to your clients by helping them stay at the forefront of their industry, check out some of the new products and ideas we saw trending at TPIE this year.
February 5, 2018
Tips for Using a Greenhouse Monitoring System to Protec…
Properly selecting and installing a remote monitoring system can help cannabis growers identify trends in environmental conditions to make sure they aren’t fluctuating, which could indicate a possible equipment problem.