Dying, Off, Color Pine Needles Normal in Autumn, Colorado State Forest Service

Ponderosa and lodgepole pines and some spruce and fir species Colorado shed older, interior needles as part of an annual growth cycle in September and October.

Ponderosa Pines, Spruce May Exhibit 'Winter Burn' Damage, Colorado State Forest Service

A Season of Change: The Reason For Autumn Colors

Forests are reeling from climate change—but the future isn't lost

trees Denver Gardeners

JeffCo Master Gardeners: Ponderosa pines, spruce may exhibit 'winter burn' by Colorado State Forest Service

Dying, Off-Color Pine Needles Normal In Autumn, Estes Valley Spotlight

Check Evergreens for Winter Damage

Dust Control - Top 3 astonishing negative impact of Magnesium-Choride on roadside vegetation

Pinyon Pine Tree Guide: Nuts, Leaves, Seeds, Growing Zone (Easy Planting Tip)

Evergreen Borer Beetles - Impact on Denver Properties

Top more 8 pine trees that turn yellow Latest - giasuminhduc