Frost Tips: Keep tropical and tender container-grown plants under a shade tree or the under eaves. Some plants like plumeria and other tropicals will benefit from being moved inside for the winter. Keep them in a brightly-lit area or one that gets filtered sun. Some, like plumeria, may drop their leaves, but they will come back again when you move them back outside in the spring. If you leave tropicals outside, keep them watered; plants withstand the cold much better when their roots are kept moist. If you move them inside, keep them fairly dry but not totally.