Which hormone suppresses the growth of plant?

Abscisic acid hormone suppresses the growth of the plant.
Abscisic acid (ABA) is a plant hormone that regulates numerous aspects of plant growth, development, and stress responses.
Seed germination is inhibited by ABA in antagonism with gibberellin. ABA also prevents the loss of seed dormancy.
Abscisic acid is also produced in the roots in response to decreased soil water potential and other situations in which the plant may be under stress.