Verbena is the ideal plant to cascade over retaining walls, containers, baskets, and window boxes. As long as its soil is well drained, verbena will reward gardeners with countless clusters blooms all season long. Verbena is also drought tolerant, making it a great choice for rock gardens and for planting in cracks between stones. The Quartz series grown in flats is more upright and bushy than the varieties grown in premium 4″ pots or hanging baskets, which tend to be more trailing and spreading. All verbena benefits from regular deadheading.