Low Grow Approved. Limbo GP presents the next generation of the popular Limbo series. Large, grandiflora-sized white flowers cover a dwarf plant habit, and when other petunias stretch, the Limbos will not. "GP" in this series stands for garden performance, thus the plants remain compact in pots, but with a slightly more vigorous spread in the garden and landscape. Its genetically dwarf nature and plant habit still remains lower to the ground in garden beds, presenting a neat and tidy appearance.