This long blooming, low maintenance climbing geranium is easy to grow. A classic choice for summer annual containers and window boxes. The zonal part of the name comes from a zone or band of darker color near the perimeter of each leaf. Bright bloom clusters provide color all season. Likes morning sun and afternoon shade. Trim off the flower heads after they fade and die to encourage more blooms late into the season. Pillar Geraniums are an herbaceous annual with an upright spreading habit of growth.