A Tree to Try – Lavelle Hawthorn (a lotta love for Lavelle)

Crataegus x Lavellei At a passing glance, the Lavelle hawthorn might seem ordinary or uninteresting, but give it a more thoughtful look and the many graces of this tree become delightfully apparent. Let’s start with the tree’s crown shape, which is a bit of a mash-up. It is simultaneously V-shaped, oval-to-rounded, and irregular (or ‘free-form’ … Continue reading A Tree to Try – Lavelle Hawthorn (a lotta love for Lavelle)

Timely Tree Tips–Which Side of Root Barriers Are You On?

Root barriers are continuous or interlocking sheets of plastic, metal, rubber, or other resilient-yet-flexible materials that are vertically installed from the just above the surface of the ground downward. The intent of a root barrier is to redirect trees’ lateral root growth away from streets, sidewalks, foundations, and other similar infrastructure. There are several different … Continue reading Timely Tree Tips–Which Side of Root Barriers Are You On?

Focus on: Drought (Timely Tree Tips)

Drought, or the more generic term water stress, has been a big issue for trees in our area, resulting in tree decline and mortality in forests, natural areas, and yards across the region. Starting in 2012, we have had a series of record-setting summers in terms of heat and days without rain. This is taking … Continue reading Focus on: Drought (Timely Tree Tips)

Timely Tree Tips: Summer Limb Drop

Any arborist worth their sawdust will tell you that trees have a greater tendency to break where structural defects are present, or during storms with high winds and precipitation. …but then there is summer limb drop (SLD) -- also known as ‘sudden’ limb drop which is equally appropriate. This poorly-understood phenomenon defies conventional thinking about … Continue reading Timely Tree Tips: Summer Limb Drop

Timely Tree Tips – Live Crown Ratio and the Value of Low Branches

Live Crown Ratio (LCR) is a simple yet important concept to be aware of when assessing or working with trees. The LCR for any given tree is derived by dividing the vertical length of the tree’s live crown by the total height of the tree. We then multiply that result by 100 to convert the … Continue reading Timely Tree Tips – Live Crown Ratio and the Value of Low Branches

Timely Tree Tips–Tree Canopy Enhancement

Thanks to research demonstrating the many benefits of trees in cities, your community’s percentage of tree canopy cover can be considered a measure of community health, vitality, and quality. Each of Washington’s largest cities has assessed their tree canopy percentage in recent years: Seattle (28%) Spokane (22%) Tacoma (19%) Vancouver (18%) Many smaller cities in … Continue reading Timely Tree Tips–Tree Canopy Enhancement