What condition is often associated with poor drainage in ornamental gardening?

Poor drainage in ornamental gardening can lead to root rot, which is a fungal disease that affects the roots of plants. When soil retains too much water due to inadequate drainage, the roots are deprived of oxygen, causing them to become weak and susceptible to pathogens. These pathogens thrive in overly wet conditions, leading to the decay of the root system. This condition can ultimately result in poor plant health, stunted growth, and even plant death.

While drought and wilting are related to insufficient moisture, they result from very different conditions. Excessive growth may also indicate over-fertilization or other factors but does not directly connect to poor drainage issues. Thus, root rot is the most pertinent condition linked directly to the problems caused by poor drainage in ornamental gardens.