Different plant types have unique water requirements, which must be considered when developing an irrigation schedule. For example, drought-tolerant plants like cacti and succulents require less frequent watering, while fruit and vegetable crops need more regular watering. Additionally, plants with deep roots, such as trees and shrubs, may require more water than those with shallow roots, such as grasses and flowers. Understanding the specific water needs of each plant type is essential for creating an effective irrigation schedule.