Do you know why the Common oak (Quercus robur) is often planted as a memorial tree? The answer is simple—it lives the longer than all other deciduous trees! It is a symbol of durability and longevity.

Typically, the common oak lives 400 to 500 years, but single trees have been seen to live up to a thousand years. Common oaks stop growing in height when they are between 120–200 years old, but they continue to grow thicker in width. This tree grows to be about 30–35 m, an in rare instances even 60 m tall.

The distinguishing characteristics of a common oak include a powerful, asymmetrical crown and strong branches that are often spread out and extend horizontally. Oak trees can also have numerous branches grow from their trunks, just a few meters above the ground, giving them a double-decker appearance. Young oak trees have either a smooth and glossy brown bark or a white-gray bark that can thicken, crack and turn dark brown.

Towards the end of the summer, oaks also bear fruit known as acorns, which are single-seeded, egg-shaped and rich in starch and tannins. Once ripe, they fall to the ground usually inside the bounds of the crown’s perimeter.

I bet that for every 10,000 acorns, only one tree will grow.

Hey, Explorer!

Take a look at these huge wooden structures. We were inspired by the shape of the magnificent oak tree. Climb to the top and discover what kind of tree grows inside. If you fail, don’t worry. You will find the answer at the top.

Check which Polish coins have oak leaves printed on them. Can you find them all?