What makes sugars that the plant needs to grow?

Much like humans, plants use sugar as fuel for energy. Plants make their own nutrients through a process known as photosynthesis. They combine water, sunlight and carbon dioxide and produce sugars. The glucose and sucrose they create is stored in the leaves and stems of the plant and used to fuel the growth of flowers and roots that do not produce energy on their own. Adding water with dissolved sugar to the plants during watering can sometimes boost the growth of immature plants since they are unable to make as much of the fuel on their own.