Should my friend be nervous, threatened or amused?

She married a much older man. He’s in his eighties and she said he just put a piece of asparagus in each of two vases on the patio. Without soil (as if that would make it ok). She hasn’t asked him why because he has a bad temper that she fears. What should she do now? They’ve been married two years.
He has always been peculiar but this is the weirdest thing yet. Money is no object. But getting him to “go somewhere” would be impossible. She just had foot surgery and is in a cast. TIA