Author Archives: Brian A. Krug

About Brian A. Krug

Brian A. Krug is an Extension assistant professor at the University of New Hampshire Cooperative Extension. E-mail him at bkrug@ceunh.unh.edu.

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

How To Take A Water Sample

It is important to test your irrigation water on a regular basis, so you know what your water quality is and if any corrective treatments are needed. When And How Often It is always a good idea to test your water whenever you start using a new water source. Take another test if there are

Smart Greenhouse Heating Saves Money

As the days get shorter and temperatures drop, it’s a perfect time to start thinking about how to reduce your energy consumption this winter. There are a number of relatively simple methods you can use. The installation of thermal energy curtains has been popular in recent years due to the substantial energy savings associated with

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

Bedding Plants and CRFs

While controlled-release fertilizers (CRFs) are not a recent addition to a grower’s toolbox, they are not nearly as common as traditional water-soluble fertilizers (WSF). Many growers comment that they don’t want to lose the control they have with traditional WSF programs. However, new formulations and technologies in CRF manufacturing, along with a desire for alternative

Potted Plants On CRFs

After seeing how bedding plants are affected by controlled-release fertilizers, three separate studies were conducted to show how the use of these fertilizers influenced the production of potted plants. The Poinsettia Experiments Rooted liners of ‘Premium Red’ poinsettias were potted into 4.5-inch containers filled with a commercial soilless substrate that was amended with CRFs: Osmocote

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.