How can conifers that are used for example as Christmas trees keep their green needles over the boreal winter when most trees shed their leaves? Science has not provided a good answer to this question ...

How can conifers that are used, for example, as Christmas trees, keep their green needles over the boreal winter when most trees shed their leaves? Science has not provided a good answer to this ...

Q: We have 14-year-old pine trees with large water berms under them for collecting water. The inside of these berms are full of pine needles that I hoped would help hold moisture but they do not ...

In some areas of the country, the choice between mulching with pine needles and wood mulch is a tough one. Since the 1980s, pine straw has been the favorite mulch in the South. It is inexpensive, ...

Purdue Landscape Report: Early June, we received a white pine sample at the Purdue University Plant and Pest Diagnostic Lab that showed early season needle loss lower in the tree canopy (Figure 1, 2).

This time of year, we tend to get a variety of calls about pines or other evergreens with browning needles. Typically, this is normal needle drop, but browning needles can sometimes indicate a bigger ...

Pine needle mulch doesn’t significantly acidify soil because the needles lose their acidity as they decompose. Bare spots under pine trees are more likely caused by dry shade and root competition than ...

South Dakota's long-needled pine trees have a new threat that can quickly starve them of water — pine wilt disease. Aberdeen City Forester Aaron Kiesz said the first case of pine wilt has been found ...