Bert Cregg

Bert Cregg is an associate professor of horticulture and forestry at Michigan State University in East Lansing.

  • How-To

    How to Treat Needle Drop on Evergreen Conifers

    This is a symptom that can signal anything from a severe tree problem to no problem at all. 1. What it looks like All the needles on a conifer begin…

  • How-To

    Yellow Leaves on Red Maples and Pin Oaks—What Does It Mean?

    These popular landscape trees generally start declining within one to two years of planting. 1. What it looks like Leaves turn yellow, but the veins remain green. 2. How to…

  • How-To

    Treat Winter Injury to Your Trees

    Winter injury is among the most common tree problems experienced in colder areas of the country. 1. What it looks like Winter injury actually includes several different plant problems that…

  • Design

    Gardening in a Changing Climate

    The topic of climate change has come to permeate all facets of our lives. From the evening news to social media, discussions of carbon footprint and global warming are never…

  • Article

    Putting Mulch to the Test

    Every gardener wants a gorgeous garden. Choosing the right plants for your site and using proper planting techniques are, of course, essential steps in establishing a successful landscape. Choosing the…

  • How-To

    The Dangers of a Spring Cold Snap

    Why does a plant that endured winter cold suddenly suffer when spring temperatures drop a bit?

  • How-To

    How to Prune Conifers

    These plants are unforgiving, so make the right cuts for the right reasons

  • How-To

    Pruning Conifers for Health

    One reason to like conifers is that they generally require little pruning. Still, it is occasionally necessary to prune these plants to improve appearance and/or to prevent future problems. It's…

  • How-To

    How to Prune Firs, Douglas Firs, and Spruces

    Learn how to prune evergreen single-needle conifers such as spruces, firs, and Douglas firs in this video with Bert Cregg, an associate professor in the horticulture and forestry departments at…

  • How-To

    How to Prune Arborvitae, Junipers, and False Cypress

      Conifers with fanlike needles include arborvitae, junipers, and chamaecyparis. These are found in the cypress family (Cupressus spp. and cvs.), Learn how to prune these conifers in this video with Bert…