At Home ~An old Cottonwood Tree July 14, 2021 Sheila 3 Comments July 2021 years have pasted what has it seen what has it heard what has it felt how many birds and animals has it supported Sad to see this old Cottonwood tree die. You may wonder how long do cottonwood trees live? A native tree can grow well into the range of 70 to 100 years, although they have the potential to grow well into a couple of hundred years unless they fall over or fall to disease.