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

Revisiting Poinsettia Cold Finishing Up North

As growers, we continue to look for methods to reduce costs while still producing high-quality crops. This is especially true when growing poinsettias, as margins continue to grow thin and competition gets stronger. Growing poinsettias at cool temperatures has emerged as an option over the past several years to reduce heating costs. The University of

Using The Plant Growth Regulator Calculator

Rounding out the GroCALC software package, PGRCALC is the third and final program that has been updated in the past few months. The calculator has been updated from a Microsoft Excel-based program to a Web-based application that does not require a user download. If you are currently using PGRCALC, you know how this tool can

A Quick And Useful Fertilizer Tool

If you have tried to use the fertilizer calculator (FertCALC) from North Carolina State University in the last couple years, you were probably disappointed it no longer worked. The problem occurred when Microsoft updated Excel. FertCALC was no longer compatible with Excel. Fortunately, a solution has been developed with the support of the Fred C.

Using The Alkalinity Calculator

Figure 1. The home page. Click on "Grower Tools" to be directed to the GroCALC page. Click here for more screen caps from the AlkCALC tool. If you have tried to use the Greenhouse Media Lab Acid Addition Calculator, the alkalinity calculator from Purdue University and North Carolina State University in the last couple years, you