Book excerpt: Climatic conditions are key determinants of plant growth, whether at the scale of temperature regulation of the cell cycle or at the scale of the geographic limits for a particular species. The climate is changing due to human activities – particularly the emission of greenhouse gases – therefore the conditions for the establishment, growth, reproduction, survival, and distribution of plant species are changing. In contrast to animals, plants are able to cease and resume growth. This flexibility in their architecture and growth pattern is partly achieved by the action of plant hormones. Still, the role of plant growth regulators (PGRs) in agriculture is modest compared to other agrochemicals, such as fungicides, herbicides, and insecticides. Plant Growth Regulators for Climate-Smart Agriculture is an invaluable guide to the varied roles filled by PGRs in the attainment of higher-quality, better-yielding crops. Salient Features (minimum 5): Explores plant growth regulators and anthropogenic climate change. Provides new insights related to hormonal cross-talk in plant development and stress responses. Sheds new light on the role of PGRs in agriculture in the attainment of higher-quality, better-yielding crops. Delivers valuable information on physiological and molecular mechanisms linked to the role of plant growth regulators in stress tolerance. Provides valuable knowledge for students of agronomy, plant physiology, molecular biology, and environmental sciences.