MINNEAPOLIS — Trees, yards and gardens are lush with all the rain recently. But some people wonder if the weather has also helped stop a pesky problem this time of year. Why are some maple trees not ...

Q. Last fall, I collected Japanese maple seeds from trees in the neighborhood and planted about 100 of them in small pots, left them out over the winter, and did not get a single sprout. Advice on how ...

Jun. 10—If you think you've been seeing an invasion of helicopters this year, you're not imagining things. Southern Minnesota maple trees are producing a copious amount of seeds that flutter from ...

PASADENA, Calif.—The twirling seeds of maple trees spin like miniature helicopters as they fall to the ground. Because the seeds descend slowly as they swirl, they can be carried aloft by the wind and ...