Other plants, by contrast, are well-known for their ability to make the transition indoors. You should fully expect that your geraniums, coleus, and begonias will bloom and perform all winter if placed on a sunny windowsill.
Many of the tender perennials we now consider annuals originally found their place in horticulture as houseplants; accordingly, these garden mainstays are also excellent candidates for bringing inside.
Left: Coleus Easy to root and can be kept growing in a glass of water, coleus like bright light. It's best to remove flower buds as soon as they appear.
Here: C. 'Inky Fingers' (top), C. 'Smallwood's Orange' (right), C. 'Dragon Tongue' (left).