Final answer:
Xeric plants, like cacti, require very little water as they are adapted to extremely dry conditions. They have small, leathery leaves and perform photosynthesis in their fleshy stems. Adding too much water is not necessary and may not be suitable for their survival.
Step-by-step explanation:
Xeric plants, such as cacti, are adapted to extremely dry conditions. They have small, leathery leaves that reduce water loss through transpiration. Instead of performing photosynthesis in leaves, xeric plants like cacti do it in their fleshy stems, which also serve as water storage organs.
Therefore, adding too much water to xeric plants is not necessary as they require very little water.