Hi there!

My world's geography features an oak forest that spans five miles thick, of undetermined length, and was planted over many hundreds of years. I'm trying to determine the process of planting and harvesting oaks (or trees in general). From the lore, the forest is large enough that there are sections where the trees are hundreds of years old. The city that planted them is home to a population of 50,000, but has fluctuated over the years. Any help or insight is much appreciated!

Thanks in advance.