Natural Grocers by Vitamin Cottage NYSE: NGVC reported modest sales growth and higher earnings for its fiscal second quarter, as management said disciplined expense controls and store execution helped offset a more cautious consumer environment.Get NGVC alerts:On the company’s earnings call, Chairman and Co-President Kemper Isely said Natural Grocers “performed well in a challenging environment,” with diluted earnings per share rising 3.6% despite softer comparable sales growth against a difficult prior-yea ...