Crops >Tree Nuts  Martella family finds walnut success Feb 09, 2011 1. Ron, Aaron and Jennifer Martella make it their business to process what they and many walnut growers produce. 2. Aaron Martella, president of Grower Direct, Inc., at a control panel, which is part of the processing facilities solar energy system. 3. Ron Martella heads the family’s various enterprises. 4. Quality control is important in delivering high quality walnuts to Grower Direct customers. 5. Bright, fresh California walnuts ready for the market.