Humboldt Nutrients Natural Grow Humboldt Nutrients Natural Grow is an ultra-concentrated organic grow formula designed to give your plants the balanced nutrition needed during the vegetation and flowering period. Natural Grow is made using the finest and freshest organic ingredients available anywhere. None of our products are imported from overseas making our prices affordable to the consumer. The base ingredients in Natural Grow will promote and facilitate the growth of beneficial bacteria and fungi in your growing media. The use of Natural Grow promotes full flavor, aromas, and beautiful bouquets only obtained by the use of the rich and pure organic ingredients provided by Humboldt Nutrients.