Is balloon rose an adverb

No, "balloon rose" is not an adverb; it is a noun phrase. "Balloon" is a noun that describes an object, and "rose" can serve as a noun (referring to the flower) or a verb (the past tense of "rise"). An adverb modifies verbs, adjectives, or other adverbs, indicating manner, place, time, or degree, which does not apply to this phrase.