For the first twenty years of an oak tree’s life they don’t produce a single acorn. Many oaks wait until they are around 50 before producing their first large crop.
White oaks will produce mature acorns in a single season, but black and red oaks produce acorns that take two full years to mature.
A 100-year old oak will produce over 2,000 acorns per season, but only one acorn in 10,000 will become a tree, which means it takes all the acorns from five massive oak trees to produce a single offspring.
What happens to the other 9,999 acorns?
Squirrels, birds, deer, bears, mice, raccoons, chipmunks and opossums are just a few of the more than 100 vertebrate species in North America that depend on acorns as part of their seasonal diet. In urban areas the acorns are often collected and tossed into compost bins or even landfills. Acorns that aren’t consumed or tossed don’t always receive the right conditions to germinate and end up simply rotting their way back into the earth. But when the right conditions occur, voila! Another magnificent oak tree is born.
The life expectancy of an oak tree varies hugely depending on conditions and species. They can live as little as 80 years or stick around for centuries. An ancient oak on the Pechange Reservation in California is estimated to be between 850 – 1,500 years old. The normal lifespan is usually falls somewhere between 200 – 400 years of age.