Talk:Alraune/@comment-29325824-20181205123722/@comment-10429980-20181205145147

Provided you had sex with her on a daily basis, she'd be able to get all her nutrient needs from you (plus she'd have access to regular food), so she wouldn't need to plant her roots.

As for the other issue you noted, perhaps there is a time limit, but we know at least some monsters can stay polymorphed for long enough periods to live in human towns without being discovered by their neighbors. Perhaps a polymorphed alraune would be happy even if she only returned to her true form for sleeping. Besides, in your scenario she'd only have to live like that for the winter.