The May 2023 issue of Digger explores the myriad ways the nursery and greenhouse industry of today is implementing sustainable measures and building on the legacy of pioneers in sustainability, such as Mahonia Nursery owner John D. Miller and agricultural inventor Heping Zhu, who developed the technology that would become the Intelligent Spray Control System. […]
Member Profile: Mahonia Nursery
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— PostedFounded: 1983 by John D. Miller Mahonia is a native plant species that plays an important role in Oregon’s ecosystems. These hardy, evergreen shrubs were used extensively by Native American tribes — as a food source, as a natural dye for textiles, and as medicine to treat a variety of human aliments, from digestive problems […]
Natives shine on
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— PostedThanks to climate change, sales of drought-tolerant, pollinator-loving native perennials are enjoying their time in the sun Concern for the environment and pollinators is inspiring gardeners to add native plants to their landscape. At the same time, climate change is driving an ongoing increase in demand for heat- and drought-tolerant natives. Sustainable landscaping with native […]
Remixing soil mixes
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— PostedMore sustainable alternatives to carbon-sequestering peat moss are entering into the planting media equation Amid growing international concerns about the environmental impacts of depleting and permanently damaging peat bogs, a movement is underway to ban or restrict the sale and use of peat moss — a nonrenewable resource that takes thousands of years to form. […]
Learning, connecting, engaging
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— PostedOregon’s Integrated Pest Management Center serves as an innovative pest management hub for growers Article and photos By Silvia I. Rondon Since the early 1960s, the Oregon Integrated Pest Management (IPM) Center has accumulated a rich history of leading and coordinating multistate research and outreach programs to help a broad audience in the agricultural and […]
April 2023: The Trees Issue
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— PostedThe April 2023 issue of Digger looks at the business of growing big trees. Columns: Departments: Download a PDF of this issue. Please send your comments on the issue to editor Curt Kipp at [email protected].
Going with the flow
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— PostedResearch on plant hydraulics helps explain the effect of drought stress on shade trees By Sadie Keller, Rebecca Sheridan, Scout Dahms-May, Carolyn Scagel and Lloyd Nackley In Oregon’s Willamette Valley, the heart of the nursery industry, rainfall is scarce during the summer and humidity is low. The plant stress resulting from the low soil moisture, […]
The tribulations of big trees
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— PostedGrowing bigger trees that will flourish in a changing climate takes a long-game approach For decades, tree-lined streets across the country — largely in the Southeast — would erupt in the bright white blossoms of Callery pear trees (Pyrus calleryana) every spring. Affordable, fast-growing and easily shipped, the trees had become the darlings of landscapers, […]
The eternal appeal of oaks
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— PostedOriginal species have stood the test of time and still sell well, while new smaller columnar hybrids of Quercus are coming on strong With fossils found as old as 55 million years, oaks have been entwined with human history since it began. Because of their longevity and massive proportions, the largest oak species in the […]
Diversifying the tree palette
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— PostedIn response to climate change, growers have become more conscientious about offering a mix of natives and clonal selections When he began working in urban forestry more than 20 years ago, Scott Altenhoff and his team would refer to a list of trees known to be strong performers in different conditions. “We would call them […]
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