Pansies have heart-shaped, overlapping petals and one of the widest ranges of bright, pretty colors and patterns. Good for containers, borders, and as ground cover, they are a go-to flower for reliable color almost year-round. Pansies look pretty on their own in a monochrome scheme or in mixed colors; they also look pretty when planted with other cool-season flowers such as violas, primroses, trailing lobelia, and sweet alyssum.