Meristems are located at the branch tip which are also called as apical meristem as a result trees grow in height. Where as the trunk diameter expands due to vascular cambium. Now for these cells to divide one of the major requirement is sunlight hence to receive sunlight the branches grow upwards.

What trees grow straight?

With columnar trees, you don’t need as much space. Many have fastigiate branches, which means they grow almost straight up rather than out from the tree, thus narrowing the size of the tree’s canopy. This form of growth allows the foliage at the branch tips to reach sunlight easily.

Do trees naturally grow in straight lines?

Logged forests support biodiversity after 15 years of reha… …