Forestry

Forestry

The City Forester is responsible for administering the City’s right-of-way tree maintenance program. Residents can expect to see tree care operations on any given day with special attention paid to the city’s older trees.

Tree maintenance includes removals of hazardous trees in poor condition, trimming of many others and replacements. This work is all part of a focus on keeping the City’s tree canopy healthy and beautifying our streets.

Annual Tree Sale

Chanticleer Pear TreeWant to spruce up your yard? The City of Golden’s annual tree sale runs from March 1 through April 15 or until we run out of trees. Sponsored by the Golden Parks and Recreation Department, this is your opportunity to get trees that are known to adapt and thrive in our area.

Each year a variety of trees that do well in Golden are offered at a discounted price. The trees typically have approximately 1” diameter trunks, are 6’-9’ tall and have either air-pruned container rootballs or are bare root trees.  Trees will be available for pickup from the Golden Cemetary at the end of April, dates are yet to be determined.

Quantities are limited and customers may order no more than three trees. Trees will be available for purchase at the Golden Community Center starting March 1 through April 15, or while supplies last. Proof of residency is required. Call the Forestry Office at 303-384-8141.

Emerald Ash Borer information

Adult Emerald Ash BorerA destructive insect pest that has killed many thousands of ash (Fraxinus) trees in the mid-section of the United States was discovered in Boulder in 2013. Since the initial infestation was found, Emerald Ash Borer (EAB) has spread further throughout Boulder County. The extent and spread of the beetle continues to be monitored closely by Boulder County, Colorado State Department of Agriculture, Colorado State Forest Service, CSU extension and surrounding front range communities. Although there are quarantines and restrictions in place for movement of ash wood out of Boulder County, it’s generally accepted that EAB will eventually make its way outside of Boulder County into all communities surrounding Boulder, Denver, and Golden.

It has become apparent that the Emerald Ash Borer now presents an increasing threat to Golden’s population of approximately 15,000 ash trees.

Although the insect has not been found in Golden as of yet, the history of this insect’s movement into 22 other states has shown that, without treatment, entire populations of ash trees are almost inevitably killed, and it is important for residents to understand the treatment options available. Chemical treatments have been proven effective and, because they are relatively inexpensive to apply, property owners with ash trees that they do not want to lose should be aware that now is not too early to consider applying a preventative treatment.

Anyone interested in protecting their ash tree, most commonly Green Ash (Fraxinus pennsylvanica) or White Ash (Fraxinus americana) should consult with a certified arborist. There are several treatment methods available. The most effective chemical treatment involves a trunk injection which must be re-applied every 2-3 years and requires a certified applicator. Other treatment options are also available. For further information regarding the best chemical treatments, visit Colorado.gov.

If your ash tree is in poor health, and you do not intend to commit to a treatment regimen, it is recommended that you consider removal and replacement. You can also plant now, with the intent to remove your ash tree in the future when EAB makes its way into our community.

Ash trees were widely planted on the front range in Colorado in the past because it thrived here, but is no longer recommended as a planting choice anywhere in Colorado. City of Golden Forestry staff have selected around 300 ash trees for treatment. They are in good planting locations, considered to be highly valuable to the community, in good condition, and good candidates for future treatments. Ash trees in park areas and streetscapes that are in poor health will be marked for removal and replacement while focusing on tree population diversity to avoid any similar species specific pests in the future.

The City of Golden intends to continue to conduct branch sampling and an on-going search for evidence of  EAB in our community into the foreseeable future. If you are uncertain whether a tree you value on your property is an ash or not, or if you have any other questions or concerns, please contact the City’s Forestry office at 303-384-8141 or wiannopollo@cityofgolden.net.

Selected Trees for Use in Golden

Shade Trees
Sugar Maple Acer saccharum
Western Catalpa Catalpa speciosa
Kentucky Coffeetree Gymnocladus dioicus
Accolade Elm Ulmus japonica x wilsoniana
Common Hackberry Celtis occidentalis
Honeylocust Gleditsia triacanthos
Horsechestnut Aesculus hippocastanum
Bur Oak Quercus macrocarpa
English Oak Quecus robur
White oak Quercus alba
American Linden Tilia americana
Swamp white oak Quercus bicolor
Although the green and white ash are important trees in our area, currently the threat of Emerald Ash Borer necessitates their exclusion from this list.
Ornamental Trees
Oak-leaf Mountain Ash Sorbus x hybrida
European Mountain Ash Sorbus aucuparia
Ohio buckeye Aesculus glabra
Crabapple Malus
Cockspur Thornless Hawthorn Crataegus crusgalli
Downy Hawthorn Crataegus mollis
Winter-king Hawthorn Crataegus viridis
Russian Hawthorn Crataegus ambigua
Japanese Tree Lilac Syringa reticulate
Big Tooth Maple Acer grandidentatum
Hedge Maple Acer campestre
Tatarian Maple Acer tataricum
Japanese Pagoda tree Styphnolobium japonicum
Ussurian Pear Pyrus ussuriensis
Texas Red Oak Quercus buckleyi
Redbud Cercis canadensis
Gambel Oak Quercus gambelii
Golden Rain Tree Koelreuteria paniculata
Evergreen
Douglas Fir Pseudotsuga menziesii
White Fir Abies concolor
Rocky Mountain Juniper Juniperus scopulorum
Eastern Red Cedar Juniperus virginiana
One-Seed Juniper Juniperus monosperma
Austrian Pine Pinus nigra
Bosnian Pine Pinus heldreichii
Bristlecone Pine Pinus aristata
Limber Pine Pinus flexilis
Pinyon Pine Pinus edulis
Ponderosa Pine Pinus ponderosa
SW White Pine Pinus strobiformis
Colorado Spruce Picea pungens
COG Mesa

 Golden was named after Thomas L. Golden,
a gold prospector who arrived in Jefferson County in 1858.

Additional Resources

City of Golden, Colorado
COG Mesa