Growing plants into trees is a -

The growth of the plant is considered a physical as well as chemical change.

It is a physical change because the growth of the plant occurs due to an increase in cell number and cell size. Growth of the plant is observed due to an increase in the size and mass of the plant. It is a very slow process and also irreversible.

It is a chemical change because the growth of the plant involves various chemical reactions such as photosynthetic reactions, the production of enzymes and hormones, etc.