When does cottonwood tree stop producing cotton?

Each year, the cottonwood tree begins releasing the cotton from its branches at the beginning of June, and it lasts through the month until the end of June.

A mature cottonwood tree never stops producing the cotton pods, however there are reports from some homeowners that the trees sometimes skip every 10th year. We bought our house in the early Spring of 1997. That year, there was no cotton. Again in 2007, no cotton. But every year in between and since, we've had cotton. I can't wait until 2017!