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 […]
April 24, 2017
Ian Baldwin Offers Examples From Grower-Retailers on Pr…
In March, Baldwin wrote a blog advising grower-retailers to consider raising their prices this spring. The post inspired a number of creative suggestions.
April 22, 2017
American Floral Endowment Announces Winners of 2017 Pau…
Four students pursuing careers in horticulture now have scholarships to help them along the way, thanks to the American Floral Endowment.
April 20, 2017
Terra Nova Nurseries Releases Two New, Attractive Begon…
Stardust is the latest addition to Terra Nova Nurseries’ existing T Rex Begonia series, and Silver is the first introduction to the company’s new Spectre Begonia series.
April 19, 2017
Suppliers Can Offer Technical Solutions for New Cannabi…
Here’s a look at how a few manufacturers have partnered with growers to make their transition into cannabis a smooth one, whether it’s through hands-on guidance or partnering with other industry leaders.
April 18, 2017
Cool Combos From CAST 2017 – Editor’s Choic…
With container gardening becoming more of a lifestyle among consumers than a trend, and breeders continuing to put more effort in container mixes and components, I feel I would be remiss if I didn't share some of the special combinations that not only caught my eye at California Spring Trials, but absolutely took my breath away and made me want to immediately get started gardening.
April 17, 2017
LumiGrow’s Latest Lighting Research Highlighted in Grow…
Industry leaders representing a broad range of vegetable, floriculture, and cannabis producers gathered to learn how to implement modern lighting strategies for their own production.
April 16, 2017
Danziger Invests in Continued North American Business G…
As part of a new business structure for its North American market, Mike Fernandez has been appointed Market Manager North America for Bedding Plants and Perennials, and Kate Zvara was named as Key Account Manager and Retail Specialist.
April 15, 2017
How Oregon Growers Are Making Lean Improvements With He…
The Oregon Nursery Lean Consortium recently helped two Pacific Northwest growers realize significant productivity gains and labor savings.
April 14, 2017
How to Trial a New Product Before You Use It in Your Gr…
Before you apply a new product on a plant, you want to make sure it is safe and effective. Technical experts from Kemin have compiled a five-step guide designed to help you measure the benefits of a new product you want to incorporate into your operation.
April 13, 2017
AmericanHort’s Production Technology Conference To Debu…
The AmericanHort Production Technology Conference is designed to give nursery and greenhouse growers a chance to get hands-on with the latest advancements in production technology and explore the return on investment potential of equipment purchases and upgrades.
April 13, 2017
Research Team Seeking Feedback From Hydroponic Growers
Are you a hydroponic grower of food crops? If so, Michigan State University and Iowa State University researchers are looking for your input.
April 12, 2017
Looking for Info on New Varieties for Hot Climates? Che…
The Florida Nursery Growers and Landscape Association’s Florida Flower Trials, which are focused on new and improved varieties able to thrive in the extremes of Florida’s climate, are a great opportunity to connect with national breeders.
April 11, 2017
Begonias, Celosias Among Dr. Allan Armitage’s Favorites…
Check out some of Allan’s top picks from his final day at CAST 2017, which included visits to Green Fuse Botanicals and Floranova.
April 11, 2017
Green Fuse Botanicals’ Rex Begonias and First Looks; Fl…
Here are the highlights from Green Fuse Botanicals and Floranova on the last day of CAST 2017.