Daisies perform best when given lots of space for their clumping roots to grow, as well as plenty of sunshine. However, some varieties of daisies can be grown in containers indoors. Make sure to give them a fairly deep container, as these perennials grow long roots. Place your potted daisies in a window that receives plenty of sun in the morning. Most daisies require less afternoon sun, and may need to be moved if you notice the hot afternoon rays are scorching their leaves. Water regularly, but don't overwater. A good rule of thumb is that the top one-half inch of soil should be allowed to dry out in between waterings.