Scientists are investigating the reasons some plants still wear last season’s tattered clothes.

Add Yahoo as a preferred source to see more of our stories on Google. For broad-leaved trees like the holm oak, which grows in Mediterranean climates with dry summers and rainy winters, this seasonal ...

One of the most useless-but-cool things about physics is the post-hoc information it offers for the field of biology. I suspect that these physics-focused explanations really piss biologists off, and ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The arrival of a new year may be brimming with new opportunities, but finding a big, beautiful, and live ...

Q: Is it common for the chitalpa tree to partially defoliate in the summer? What would be the optimum amount of water for 15-foot chitalpa tree growing in Kingman, Arizona? A: Chitalpa, like some ...

Have you ever noticed that when you cut down a tree — or a tree dies suddenly — the dead leaves stay on the tree for a long time? The leaves go from green to brown, but stay on the dead tree branches.

Despite high winds and deep drifts of snow, despite all their neighboring deciduous trees now leafless and bare, some hardwoods — the oaks, witch hazel, musclewood, ironwood and, most noticeably, ...

Spotting a few brown or dying leaves on your tree can be distressing. While it's probably not a reason to panic, it is a sign that you should take a closer look at your tree's health. A lot of ...

Tree rings hold clues about ancient solar storms. New research shows tree growth and carbon storage can shift those signals across years.

Q: My evergreen oak tree is more than 20 years old. Some of the leaves are turning yellow and dropping. While there is some new growth, it is not as vigorous as prior years. The tree is on drip ...

If you walk much in the Seattle area, you may notice an occasional sweet smell this time of year. Some say it’s like cotton candy or caramel. This fragrant aroma comes from the fallen leaves of ...