The phrase "begin to grow" can be replaced with a variety of synonyms to add more depth and nuance to your writing. Some alternatives to "begin to grow" include "sprout", "germinate", "develop", "blossom", "flourish", "thrive", "mature", "expand", "prosper", and "bloom". Each of these synonyms conveys a slightly different meaning and can be used to describe various stages of growth or expansion. Whether you're writing about plants, businesses, or personal growth, using these synonyms can help you paint a more vivid picture of the process and convey a clearer message to your readers.