Larger leaves favor photosynthetic production of a sugar-rich fluid to nourish the tree, but if the tree is too tall, the nutrient flow is slowed. Why are the leaves on the tallest trees all about the ...

Question: Weeping willow, six years old and 9″ diameter. Wet, clay ground and thriving. Suddenly late last summer, I noticed the leaves were dead, and the bark on the trunk was completely loose and ...

Q: I have a beautiful green ash tree in my front yard and hope to keep it protected from the ash borer as long as possible, but today I noticed a lot of leaves have fallen off. There are little dark ...

The 150-year-old tree was badly burned in the fires that ravaged Maui last month. New green leaves hint at the possibility of recovery for the tree and its community. By Livia Albeck-Ripka Over the ...