Jacobs Ladder or Aarons Beard Useful groundcover under trees and shrubs as it covers surface roots easily. Plant in full sun to full shade (reduces flowering), in well-drained soil with irrigation 1-2 times per week. The foliage is evergreen in mild winters, growing to 18 in. tall and spreading by underground roots. Flowers are bright yellow, 4 in. in size from June through August. (Plant 24 in. on center )