Ten years ago, Brenda Brock was selling organic skin lotions she whipped up in her home blender at a farm stand in Portsmouth. Today, she’s heading up one of the hottest natural, green skin care lines in the country as founder and CEO of Farmaesthetics. The skin care line was selected to among a handful of natural product companies to be featured in Macy’s new Beautiful Planet, a green cosmetics boutique within the department store.