John Erwin - Greenhouse Grower

John Erwin is a professor in the Department of Horticultural Science at the University of Minnesota. He can be reached at erwin001@umn.edu.

Basics & Beyond: New Kalanchoe For Cultivation

By John Erwin | |November 24, 2014

When To Light and When To Shade: Ready Research Results

By Jennifer Boldt | John Erwin|November 30, 2010

Energy-Efficient Annuals: Perfecting Temps & Light

By John Erwin | Matthew Blanchard | Erik Runkle | Paul Fisher|February 10, 2009

Essential Equipment

By John Erwin|June 17, 2008