Pine trees, as with any typical conifer, keep their needles all year. Deciduous trees, such as maple, birch, or hickory, drop ...

Conifer trees are pretty hardy, but they are still prone to turning brown. Here is what to do if you notice rust-colored ...

Though conifers may or may not lose their needles annually, most are indeed evergreen. Trees of this classification have needle-like or scale-like foliage and usually renew many leaves annually.

Conifer needles consume oxygen in early spring even during the day, new research shows. Credit: Stefan Jansson Plants give us oxygen through photosynthesis—this is commonly taught in school.

The easiest way to identify a conifer is by its leaves, which are called needles. Needles are usually quite narrow, and they have a wax coating to keep water inside during winter and other dry times.

The umbrella part, at least, offers some insight: The lustrous, oversized needles are arranged in whorls of up to 30, like the spokes of an exceptionally well-reinforced parasol.

“Conifer needles have varying life spans, depending on the species and environmental conditions,” said Lerner. “White pine and arborvitae needles live for 2-3 years, Austrian and Scots pine needles ...

On true pine trees and larches, needles are arranged and attached to the branches in bundles or clusters with two, three, or five needles per bunch, however, the needles of other conifers ...

Every year, as a normal part of a conifer’s growth cycle, evergreens will experience a certain amount of needle drop. The extent and speed at which needles fall varies from species to species.

Evergreen trees and shrubs often (but not always) have needles and produce cones. These needled cone-bearing trees are called conifers. Example of conifer trees include pine, fir, spruce and cedar.

Conifers don’t complete an annual shed like deciduous trees, but a portion of their oldest needles do drop each year. How long each needle holds on is particular to the species, ranging from two ...