Citrus rootstock refers to the underlying foundation upon which any citrus fruit, such as lemon, orange, and grapefruit, are grown. Although it is commonly referred to as "citrus rootstock", there are various other synonyms that are used to describe it. Some of these include citrus root systems, citrus tree root stocks, and citrus tree root systems. Essentially, these terms all describe the same thing, which is the fundamental structure that provides plants with the essential nutrients and water they need to thrive. Understanding these synonyms can be helpful, especially if you are an avid gardener hoping to grow your own citrus trees.