So... She has a need for changing her methods of sleep regularly, even if nothing in particular has changed in the environment that would impede her sleep?
@MarqFJA87 She isn't compelled to change the way that she sleeps. It's either that her sleep isn't good and she needs to find some way to improve it, or that the reason she was able to get a good sleep has been changed or removed. She won't be able to use the flower again for another 50 years.