I had a hibiscus plant in a pot all last summer and it did beautifully. When the weather started to get colder, I took it indoors and it did very well with new growth all winter. The weather has gotten warm and I put it outside again. I started noticing that the leaves are losing color and becoming white. I moved it back inside and it is getting new growth but I was wondering what is wrong with it and can I put it back outside. The temps have been in the 80's during the day and down to the 50's at night. Thank you.