Different plants drink at different speeds. Some love constantly moist soil; others prefer to dry out a bit between waterings. If you place thirsty plants and drought-tolerant ones randomly, watering becomes confusing and you’re more likely to overwater some and underwater others.
By grouping plants with similar water needs together, you simplify your routine. That whole corner gets watered on the same schedule, and the other group is checked less often. You don’t need to remember individual rules for every pot scattered all over.
It also helps you spot problems faster. If one plant in a group is suffering while the others are fine, you know it’s not the general watering pattern but something specific to that plant or pot.
This small bit of planning upfront saves you time, reduces guesswork, and usually leads to healthier plants.