3 huge Silver Maple trees in my yard produced the red flowering mess this year, but none of them have produced the "whirly bird" seed pods. I do not miss cleaning them up this year, but wonder if their absence was caused by last year's drought stress. Additionally, the big Cottonwood trees in my neighborhood produced very insignificant "cotton fluff" this year (again, not missed). Does this mean the trees are in trouble? I hope this year's rain is helping them to stay healthy! Thanks, Kay Taylor