Watering plants is essential, but flushing plants is also beneficial. Flushing plants means flooding them with water. Due to excess water, the soil is washed, and excess nutrients are removed.
You just need to give excess water to the plants so that it starts draining out from the hole at the bottom. Overwatering is done, and the water is drained from the bottom. The drained water brings extra nutrients from the soil.
Image Source: growdiaries.com
Usually, plants are flushed with plain water. Some growers also prefer flushing plants with
distilled water. But when the pH is unbalanced, or the plant is suffering from the nutrient lockout, pH-balanced water is preferred.
https://medicgrow.com/blogs/general-tips/beginners-guide-to-flushing-plants-why-when-and-how#:~:text=Flushing plants means flooding them,is drained from the bottom.
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