Sentence examples for a weed from inspiring English sources

The phrase "a weed" is correct and usable in written English.
It can be used to refer to an unwanted plant in gardening or agriculture, or metaphorically to describe something undesirable in a different context.
Example: "In my garden, I spend hours pulling out a weed that keeps coming back no matter how many times I remove it."
Alternatives: "an unwanted plant" or "a nuisance plant".