If your indoor plants start to look worse, their leaves turn yellow and look stunted, then this is a sign of iron deficiency.
It is very easy to make up for the deficiency.
It is necessary to bury several rusty nails in the pot, which will release the necessary substance into the soil.
You can also use new nails, but it will take more time for them to begin to saturate the soil with iron.
But what else can you put in flowerpots?
You can replenish iron with green leaf tea. Use only dry tea. You cannot use the raw mass that remains after drinking tea. In this case, mold will appear in the flowerpot.
If plants are experiencing a potassium deficiency, then a regular banana will be a great way to replenish it. Just take the peel and grind it, and then bury it in the soil.
Calcium can be obtained from pre-crushed eggshells.