While most plants growing in the ground can get all the nutrients they need from the soil, plants in pots rely entirely on you for their food supply. Many potting soils contain fertilizers, but once your plant has used these up, you will have to step in and start feeding them.
Houseplants will thrive and grow with regular feedings. To keep it simple the majority of houseplants need a balanced liquid fertilizer. You can buy as either a powder or a liquid that you then dilute, or as a ready mix solution. This type of fertilizer is applied at regular intervals throughout the growing season,
usually from spring to fall.