Dr. Dirr Discusses Quercus virginiana- Live Oak
Bonnie and I spent a few days at Hilton Head during the week between Christmas and New Year’s. At our fourth-floor condominium, the view from
Read More
Salt Tolerance in Woody Plants
Michael A. Dirr HMI requested a brief discussion on salt tolerance in woody plants. I started my career at the University of Illinois, Urbana, in
Read More
Dr. Michael Dirr discusses: Parrotia Persica – Persian Parrotia, Persian Ironwood
Parrotia persica-Persian Parrotia, Persian Ironwood Michael A. Dirr What a great small tree! Roaming the Georgia campus in early March, I notice specks
Read More
Dr. Dirr Discusses: Aesculus pavia- Red Buckeye
The red buckeye is among the most beautiful eastern North American tree species, especially in flower, when the brilliant red panicles glow in the woodsy
Read More
Dr. Michael Dirr’s latest findings: Chionanthus retusus- (Chinese fringe tree)
Chionanthus retusus– Chinese fringetree Michael A. Dirr In 2018, I was asked to assist with our county’s (Oconee, Georgia) tree planting project for a new
Read More
Dr. Michael Dirr’s Latest Findings: Magnolia Virginiana- Sweetbay Magnolia
In previous tree profiles, I discussed Magnolia acuminata and M. × soulangeana and herein highlight an increasingly important landscape species, M. viginiana. It is becoming
Read More
Dr. Dirr’s Spotlight: Acer Pseudosieboldianum – Korean Maple
Certainly, easy to become monochromatic about small maples when Acer palmatum and the numerous cultivars are readily available via garden centers and mail order sources.
Read More
Dr. Dirr’s Tree Spotlight: Quercus Lyrata-Overcup Oak
The overcup oak, Quercus lyrata, languished in landscape obscurity until the 1990s when several Georgia nurserymen realized and developed its potential. The University of Georgia
Read More
Dr. Dirr Tree Spotlight: Magnolia x soulangeana- saucer magnolia
The hope of spring is tethered to this species and the many cultivars. Difficult to imagine a garden, park, campus, golf course, city street, commercial
Read MoreDr. Dirr’s Tree Spotlight: Liriodendron tulipifera (Tuliptree)
From the arborists’ point of view, the tuliptree has more than its share of liabilities including excessively fast growth, limb breakage, drought-induced premature leaf abscission,
Read More
Recent Comments