Blog

Preventing Drought Stress In Established Trees

June 19, 2019 By , ,

Summers in the Portland area are very dry. While the dry weather is often blissful for the waterlogged human residents who endured the past eight months of rainfall, our trees can suffer drought stress. Drought stress occurs when limited access to water interferes with the tree’s normal growth processes. Drought stress can limit root growth, limit tree growth due to... Read More

Stroll Among The Trees and Shrubs at the Crystal Springs Rhododendron Garden

May 6, 2019 By , , ,

Located just minutes from downtown Portland near Reed College, the Crystal Springs Rhododendron Garden is a riot of color in the spring. The botanical garden has over nine acres of spectacular specimens of rhododendron and azalea planted alongside Crystal Springs Lake, which is fed by the property’s natural springs. The meandering paths that take you across bridges and alongside waterfalls... Read More

Tree Anatomy: Flowers

April 22, 2019 By , ,

Spring in the Portland area is accented with explosions of color on flowering trees and shrubs such as the flowering cherry, flowering plum, magnolia, and camellia. These tell-tale signs of spring are not only beautiful, they function as the crucial reproductive system of the flowering plants (angiosperms). In angiosperm reproduction, pollen is produced by the male organ and is transferred... Read More

Oregon Arbor Week 2019

April 5, 2019 By ,

Oregon celebrates the beauty and benefits of trees for the first full week of April every year. Our local communities show their tree appreciation through activities geared for the whole family. A select few are listed below. How will you celebrate the trees in your community? Beaverton will host an Arbor Day tree planting on April 6th. Lake Oswego celebrates... Read More

Nuisance Trees

March 11, 2019 By ,

When recommending a tree to plant, we go by the guideline, “Right tree, right place”.  Many tree species are well suited to the right setting, but there are a few trees that we don’t recommend anywhere. Some of these trees are listed on the Nuisance Tree Lists of several local municipalities. The English Holly, seen above, is considered invasive and... Read More

Tree Line

January 14, 2019 By , , ,

The snow-covered peak of Mount Hood dominates the eastern skyline of Portland in the winter. From a distance, it looks as though there is a sharp line above which trees do not grow. The elevation above which trees do not grow is called the tree line and is at about 6,000 feet on Mount Hood, or about the elevation of... Read More

Clearance Pruning

December 5, 2018 By , , ,

Our Portland area is known for its lush urban forest. We gratefully live amongst trees here. Trees and shrubs grow above and around our houses and workplaces. We walk in their shade along sidewalks and on turf. We drive cars and ride bikes under their canopy on the roadways. Caring for urban trees often requires clearance pruning, which removes growth... Read More

Seasonal Evergreen Foliage Changes

September 27, 2018 By ,

Autumn in the Pacific Northwest is heralded by the bright leaf color change in prominent deciduous tree species. Many Portland area residents are surprised to learn that many evergreen trees also exhibit seasonal change in their foliage at this time of year. Deciduous and evergreen trees have foliage that converts sunlight into energy. Deciduous trees lose all of their leaves... Read More