What happens to sugars that aren't used by trees and plants for energy?

Answer 1

It is stored and used later for another time in the plant when energy is needed.

Answer 2

Excess sugars produced by trees and plants are often stored in the form of starch in various plant parts such as roots, stems, and fruits. Some sugars may also be converted into structural components like cellulose for growth and maintenance. In some cases, excess sugars can be exuded through roots to attract beneficial microorganisms or released into the environment.