Keep your plant and color palette to a minimum. We satisfied Lynne's desire for saturated hues with groupings of 'Serena Purple' angelonias, 'Landmark Gold' lantanas, 'Double Knock Out' roses, and chartreuse sun coleus. Why you'll be glad you did: Clustering your plants creates a big effect. A garden of singletons doesn't look like much. Later, you'll wonder where your money went.