PlantLeaching.
Moving dissolved substances out of a growing medium with water that drains away.
What it means for your plants
Leaching can help manage accumulated soluble salts when appropriate, but should not be done indiscriminately to already waterlogged or root-damaged plants. Drainage, water quality, and species all matter.
IN PRACTICE
Water poured through a suitable draining pot can carry some accumulated salts into runoff that must then be discarded.
Put it into practice
Recognize possible overfeeding, review overlapping fertilizers, and take measured steps when excess salts may be damaging a plant.
Fertilizer burn in houseplants: prevention and recovery checks