You may notice trees along the Parkway between 1st Avenue and 6th Avenue marked with yellow tape for removal by the Office of the City Forester. Many of these trees will be removed over the next 3 to 4 years because they are locust trees dying from thyronectria canker, an incurable disease common in locust trees in our area. The trees in the worst condition will be removed first and then it continue over the next few years as they continue to decline.
The good news is that the diseased trees will be replaced in the pattern described below by the Office of Forestry:
The long-term plan for replacement is a designated planting pattern so when a tree comes out, the replacement species is pre-determined to establish a lasting, diversified pattern. Not every planting space on the parkway was designated, only where Forestry believes it is appropriate. This is especially true where the encroachments in the parkway impact the pattern.
The pattern focuses on the front row, or street adjacent trees, to re-create the historic allee that looks similar in form and stature, mirrored on both sides of the parkway, north to south. The Pattern:
- 2 honey locust
- Kentucky Coffeetree
- Japanese Pagodatree
The back row, or property adjacent trees, will be infilled with various species of maple, oak, elm to keep our diversity wide. Replacement of diseased locusts will take place over the next 3 – 4 years. No pre-determined locust sites will be replaced/planted until the final year when all infected trees have been removed. This means that there will be spots that remain empty until year 3, those will then be filled in with locust plant. Approximately 34 locust trees will be removed per year with other trees to be removed and replaced as designated when needed by Forestry.”
Should you have any questions about work being done, please email [email protected].
PS – If you are interested in the topic of tree diversity or sustainable urban forests, Denver Botanic Gardens is offering an online, in-depth look at this topic on Friday, March 5 from 8:30 AM to 3 PM. Tickets are reasonably priced and offered at student levels. Here’s their description from their most recent Botanic Buzz newsletter:
7th Annual Tree Diversity Conference: Explore the relationships between landscape design, horticulture and the use of a greater variety of tree species to protect our urban forests, which are threatened by pests, pathogens and climate change. Our speakers possess an impressive depth of experience ranging from worldwide plant exploration to landscape and garden design, promotion of new plant materials and hands-on experience with plant testing and data collection.