Canna Terra Professional Canna Terra Professional combines many years of research, knowledge, expertise and experience of hydroponic growing into its easy to use, superior potting mix. Canna Terra Professional contains a blend of sphagnum moss peat, peat, perlite and a special “natural plant boosters” which are a blend of organic ingredients proven to stimulate root growth and to protect against root disease. Canna Terra Professional also contains trace elements and chelates and is enriched with a special feeding mix that contains all the elements that a plant needs for their first week of growth. When used in combination with Canna Terra Vega and Canna Terra Flores you will get the superior results.