PlantpH.
A measure describing how acidic or alkaline a solution or growing environment is.
What it means for your plants
Root-zone pH affects nutrient availability. Symptoms alone do not prove a pH problem. Avoid adding household acids or alkaline materials without an appropriate test and a clear horticultural reason.
IN PRACTICE
Pale growth can have many causes, so an improvised vinegar treatment is not a sound first response.
Put it into practice
Understand when indoor plants need fertilizer, how to read feeding directions, and when to pause feeding instead of adding more.
How to fertilize houseplants: a practical feeding guide