What condition does permanent wilt refer to in plants?

Permanent wilt refers to a condition where a plant can no longer take up sufficient water due to particular soil conditions that interfere with its ability to extract moisture. This can happen when the soil becomes compacted, excessively dry, or too saturated to allow for proper root function. Once a plant reaches this stage, even if water is supplied, it may not recover as its cells have suffered irreversible damage due to dehydration, leading to the characteristic wilting.

Understanding this concept is crucial for proper greenhouse management, as it emphasizes the importance of maintaining optimal soil health and moisture conditions. Recognizing the signs of permanent wilt can help in taking corrective action before plants suffer irreversible harm.