What age should you harvest?

By Piers Maclaren – source New Zealand Tree Grower, August 2003

People often ask about rotation age. How long does it take a given species to mature? Unlike pumpkins – 6 weeks, or people – 53 years, a tree is mature at any age you want it to be which is whenever you need the cash. You can produce Douglas-fir Christmas trees at age three or temple-columns at age 100. Of course, it is inefficient to fell trees too early or too late – assuming prevailing prices at the time are favourable, you maximise your profits at a certain, predictable rotation age. Let us analyse this in detail.

whatage. doc