Canannuals and tender perennials be overwintered indoors?
It depends on the annual, and indoor conditions, but many can if sufficient light and temperatures between 50 and 70 degrees F. Or they may last through fall, giving some color indoors. Just treat as a houseplant, fertilize according to label directions if growing and blooming, and watch for pests. Coleus dianthus, and geraniums in particular are often overwintered indoors. Tender perennials that we grow as annuals in the north, like many salvias, can also be held indoors if cool. Too much heat, with too little light, for any of these may make them spindly with little or no bloom.
