Call it flowers for the dead
Referring to the last line. When he bury’s you dead and waters on top of you, it grows plants. The plant he seems to be watering is flowers. And since your dead, its like you have flowers on your grave, as if you died and you were buried in a cementary, which is what he means.
Cementaries are known for where dead people die, and their loved ones come to their grave to put flowers on top to remember them
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