There are many coniferous trees that have single needles directly and singly attached to the twig. These attachments can be in the form of wooden "pegs" (spruce), can be in the form of "direct ...

Rhizosphaera needle cast is a fungal disease, caused by Rhizosphaera kalkhoffii that attacks the needles of Colorado blue spruce in the spring, as new needles emerge. However, infected needles often ...

The cones are cylindrical and upright and the shape is very narrow with rigid, upright, or horizontal branching as opposed to "drooping" branches on some spruce trees. Fir tree needles are soft ...

Q. Two of my dwarf Alberta spruce has a problem that causes the needles to turn brown and fall off. I have tried insecticide and fungicide to control the problem. One of the trees looked much ...