How much tree growth in girth of trunk per year?

The growth in girth of a tree trunk can vary widely depending on species, age, environmental conditions, and available resources. On average, many tree species can grow between 1 to 2 inches in girth per year. Fast-growing species might exceed this, while slower-growing species may grow less than an inch annually. Factors such as soil quality, water availability, and climate also play crucial roles in determining growth rates.