Is the apostraphe correct in What did you do with the houseplant's I bought yesterday?

The apostrophe is incorrect in the question, What did you do with the houseplant's I bought yesterday? It should be:

What did you do with the houseplants I bought yesterday?

Explanations:

Houseplants is plural.

example: I bought 6 houseplants in red containers.

Houseplant's is singular possessive.

example: The houseplant's leaves were red-colored.

Houseplants' is plural possessive.

example: All the houseplants' leaves had wilted since I bought them yesterday.