Central Washington, Eastern Washington, Seattle Metro, Western Washington
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- 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 a Tree Profile over 10 years ago, I raved about the American hornbeam, Carpinas caroliniana and still feel the same today. With the more recent arrival of several new cultivars which display some of the best characteristics of this species, an update on this tree is in order. Let’s start with its generic attributes. … read more of American Hornbeam Cultivars – Carpinus caroliniana: Native Flame®, Palisade®, Ball O’ Fire™, & Rising Fire®.
Maples have been widely planted in the urban landscape because they are so tough and tolerant of the urban environment. Not that we need even more maples on our tree lists, but if you are growing them or are planting more, you should know how the various forms and cultivars compare to each other. The … read more of Urban Sunset® Maple – Acer truncatum x platanoides ‘JFS-KW187’ 27545.
The swamp white oak, Quercus bicolor, is as tough a drought tolerant, wet soil tolerant, broadleaf work horse of an urban tree as you might ever see. It may not have some of the bright fall color characteristics of some of the other newer cultivars, but this Midwest native should be on your street tree … read more of Swamp White Oak, Quercus bicolor.
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’.