Green Webinars
Healthy Soils Support Healthy Trees – The Amazing Soils Genomics (2 ISA CEU 2 LACES PDH)
Urban trees are vital to our urban ecosystems. Green industry professionals understand the benefits large mature trees provide and their effects on health and quality of life of residents. However, urban trees face various challenges, including soil degradation, pollution (including deicing salts and pesticides), invasive pests, compaction, extreme weather conditions and many other stress…
Friday, September 25, 2026 12:00-2:30 EDTSpeakers: Wei Zhang, Ph.D.
Green Stormwater Infrastructure: Does it Work? (1 ISA CEU 1 LACES PDH)
Green Stormwater Infrastructure (GSI) is typically built for multi-purposes: reducing peak runoff volume of stormwater runoff, removing pollutants, and providing the benefits of green space as well as for recreational purposes. Vegetation is used in GSIs to achieve these functions. It is also called Low Impact Developments (LID). By definition and by the term, LID…
Friday, August 21, 2026, 12:00 PM – 1:30 PM EDTSpeakers: Wei Zhang, Ph.D. and Gordon Mann
Irrigation Salinity: Is Reclaimed Wastewater the Solution to Urban Trees in Arid Area? (1 ISA CEU 1 LACES PDH)
Soil salinization occurs naturally or due to human activities, such as deicing salts during winter storms, irrigation and fertilization. Irrigation salinity often happens in arid or semi-arid region. It is because almost all irrigation water (even natural rainfall, picked up from atmospheric aerosol) contains some dissolved salts. The dissolved salts content can be very high…
Friday, July 24, 2026, 12:00 PM – 1:30 PM EDTSpeakers: Wei Zhang, Ph.D.
Say “NO” to 1-Year Warranties on Newly Planted Trees (1 ISA CEU 1 LACES PDH)
A one-year warranty is a very common specification for landscape projects. One year may be enough for smaller shrubs and plants. However, it takes 2-5 years for medium-sized trees and longer for large-sized trees to successfully establish. Most ball & burlap trees lose 80+% of their root system during digging and transplanting. Container-grown trees come…
June 19th 12:00-1:30 PM EDTSpeakers: Gordon Mann, Wei Zhang, Ph.D. and Jim Urban
Balancing Drought Restrictions and Water Prescriptions for Young Trees While Enhancing Water Conservation (1 ISA CEU 1 LACES PDH)
Municipalities impose water restrictions during droughts and when water is in shortage. The most commonly restricted areas is landscape irrigation. While lawns can be restored within weeks, it take decades for trees to grow to their mature size, when the benefits of trees are at the maximum. Water restrictions disrupt the growth of the trees…
May 21th 12:00-1:30 PM EDT
Soil Oxygen: The Real Limiting Factor For Urban Trees (1 ISA CEU 1 LACES PDH)
Free Webinar on April 30th, 2026, 12:00-1:30 PM (EDT) Among some of the common questions regarding urban trees: Why can’t we save all the rain during the winter months for the trees during the summer droughts? Why most trees do not have deep roots? Why compacted soils are bad for your landscape? Why do trees…
April 30th, 2026, 12:00-1:30 PM (EDT)
Money Does Grow on Trees, At Least For Municipalities (1 ISA CEU 1 LACES PDH)
Community forests are vital to our communities’ ecosystems by offering many benefits including providing shade and cooling temperatures, reducing stormwater runoff and flooding, removing pollutants from the air and water, enhancing residents’ overall health, and improving the quality of life in our communities. These benefits, however, can only be realized with healthy mature trees, which take decades…
Reaching Canopy Goals Require More Than Just “Planting” (1 ISA CEU 1 LACES PDH)
Among the common factors affecting the survival of newly planted trees, under-watering and over-watering are the top two. Providing water to newly planted trees for the first 2-5 years is critical for their survival and growth to receive the benefits and return on investment. We all have seen and probably participated in one of the…
March 27, 2026, 12:00-1:15PM (Eastern Daylight Time)Speakers: Dr. Wei Zhang and Gordon Mann
Deicing Salt: The Silent Killer of Urban Trees (1 ISA CEU 1 LACES PDH)
Sodium Chloride, the most predominant salt used on streets for melting snow and ice, is the lubricant of the modern lifestyle in northern climates during wintry weather conditions. These same streets and parking lots are also the battleground where urban foresters strive to build green infrastructure for canopy coverage, stormwater management and aesthetics. It is…
Friday, Feb 27, 2026 12:00-1:30 PM ESTSpeakers: Dr. Wei Zhang and Gordon Mann
Soil Moisture: The Most Important Factor for the Survival of Newly Planted Trees (1 ISA CEU 1 LACES PDH)
The most common cause of death of newly planted urban trees is under- or over-watering. To battle this problem, there are many guidelines written to prescribe how much water for newly planted. However, none of these prescriptions addresses the watering application efficiency: How much water evaporates, runs off, lost via drainage in porous soils, and…