What is a key benefit of having well-drained soil in a greenhouse?

A well-drained soil is essential in a greenhouse environment because it directly influences plant health and growth. Well-drained soil facilitates healthy root development by ensuring that oxygen can reach the roots, which is crucial for their function. Roots need oxygen to absorb nutrients and water effectively; without proper drainage, excess water can lead to saturation, depriving roots of oxygen and causing conditions such as root rot.

Root rot is often caused by pathogens thriving in overly moist environments. When soil retains too much water, it creates an ideal habitat for these harmful organisms, which can attack the roots and lead to plant death. Therefore, good drainage minimizes the risk of root rot, allowing roots to thrive and plants to grow vigorously.

Additionally, while well-drained soil can affect evaporation rates and watering needs, these factors are secondary benefits. The primary advantage is the creation of an optimal environment for root health, which is foundational for achieving overall plant vigor and productivity in a greenhouse setting.