What liquid makes plants grow faster?
Water and sugar combined with water is the best liquid for plants to grow faster in.
Auxin is a chemical which makes plants grow faster. Specifically, the chemical in question can be described as a plant hormone or phytohormone to regulate growth. The terms comes from the Greek word αυξειν (auxein) for "to grow, to increase." Auxin may occur naturally -- often in cooperation with the plant hormone cytokinin -- or synthetically.