It is nowadays possible to remedy polluted soils by using various physical, chemical, and biological methods. One of these possible biological remediation methods is phytoremediation, a technique that involves the use of plants to clean up polluted soils. As the quantity of available water decreases in the present-day world, water is becoming an increasingly more valuable resource. In this context, deficit irrigation is a novel approach developed in recent years, aiming for the effective use of water resources.