The growth and development of a plant are influenced by genetic factors, external environmental factors, and chemical hormones inside the plant. Plants respond to many environmental factors such as light, gravity, water, inorganic nutrients, and temperature.
Recommended reading: Kumar, R., Khurana, A., & Sharma, A. K. (2013). Role of plant hormones and their interplay in development and ripening of fleshy fruits. Journal of Experimental Botany, 65(16), 4561–4575. https://doi.org/10.1093/jxb/eru277.