CANNA Terra Professional is a nitrogen rich soil mixture for plant breeding. Your plants grow best in nitrogen-rich soil. CANNA Terra Professional Earth Blends are not comparable to blends from a traditional garden center. Our product contains a mixture of sphagnum moor peat, compost, wormwood, perlite and a special natural plant accelerator that consists of a mixture of organic ingredients. For indoor and outdoor growing, our earth mix is the product of choice.