Aerial roots are one of the most unique and wonderful features of figs. Aerial roots start out as small fine filaments from the trunk or branches and grow down to the soil. Once rooted into the soil they thicken and can become as thick or thicker than the trunk or branch from which they originated.
Growth of the aerial is faster than growth of the trunk. Designs utilizing aerials may need to be adjusted over time to compensate for the aerials growth.