Central Washington, Eastern Washington, Seattle Metro, Western Washington
- Expert Witness
- Habitat Revival
- Hazard/Risk Assessment
- Insect/Pest/Disease Diagnosis
- Landscape Planning/Management
- Native Restoration
- Plant Health Care
- Report Writing
- Resistograph Testing
- Slope Issues
- Soil/Site Analysis
- Tree Selection
- Urban Forest Management
In place of a tree profile this quarter, I’ve compiled an update of what we have observed about the performance of different species. Over 60 trees have been reviewed here and we have learned a lot of helpful information for tree selection and management. Remember, these are my observations, limited to these specific trees grown … read more of PNW Tree Profiles September 2017 Updates.
Cultivars of Parrotia persica have been mentioned in past articles but the Persian Spire™ upright ironwood, ‘JL Columnar’ P.A.F., merits its own profile. Discovered by John Lewis of JLPN Nursery in Salem, Oregon in 2013, he likely first noted its strong upright growth. He then found that the foliage was finer with a narrower leaf … read more of Persian Spire™ Upright Ironwood, Parrotia persica ‘JL Columnar’ P.A.F.
Linden trees, especially American, Tilia americana and littleleaf, Tilia cordata, have been widely planted in urban areas because they are drought tolerant, durable and beautiful, and thrive is some of our toughest locations. However, aphid infestations on these lindens can be incredibly messy and a real nuisance. The “honeydew” under a street tree can appear … read more of Silver Linden Tilia tomentosa.
There are technically only a few trees that come close to the small tree category for utility planting these days, maturing at less than 15 feet tall. There are even fewer that are narrow and this short. The new Emerald Spire® crabapple, Malus x adstringens ‘Jefgreen’ fits the bill. Maturing at no more than 15 … read more of Emerald Spire® Flowering Crabapple Malus x adstringens ‘Jefgreen’.
The magnificent Princeton elm, Ulmus Americana ‘Princeton’ is the ideal tree to plant where large soil volume and above ground space is available. This is a true American elm, not a hybrid, but selected from a specimen around 1922 and developed by Princeton Nurseries. It has a proven record of Dutch elm resistance and longevity … read more of Princeton Elm, Ulmus americana ‘Princeton’.
The large and fragrant flower of the common lilac is a fondly held memory and experience for many of us. Most often planted as a shrub, lilacs have also been grown in tree form for some time. However, they are not used as often as they should as a tree. In addition to the more … read more of Tree Lilacs, Syringa Reticulata and S. Pekinensis.
Not long ago, I wrote of three Parrotia Persica cultivars worthy of note for your street tree list: ‘Ruby Vase,’ ‘Vanessa,’ and ‘Persian Spire.’ I have just come across another to add to this list, Golden BellTower™. A friend and local tree grower, Ken Christianson at Chrishaven Trees in Burlington, Washington, discovered this tree nearly … read more of Golden BellTower™ Columnar Ironwood PPAF Parrotia Persica ‘Chrishaven 1’.
Sourgum, Black Tupelo, or Black Gum, or whatever your common regional name is for Nyssa sylvatica, chances are you would plant more if you could get your hands on nice specimens. Sourgum’s biggest attraction is for its spectacular fall color. Its nemesis has been the irregular form that plagues successful growing and use of the … read more of Using Nyssa Sylvatica Cultivars.
And there I was, stopped in my tracks again while walking the nursery rows. Hot Wings maple, Acer tartaricum ‘GarAnn,’ with its bright red ‘whirlybird’ samaras showing up in tight bunches all over the crown, was like nothing I had ever seen. And even better, I find out this amazing show of color lasts for … read more of Hot Wings Maple – Acer Tartaricum ‘GarAnn’.