House Plant Secrets.“How The Heck Do You Grow That Inside?” My neighbors, Bill and Linda, stood at the door amazed by my lush house plants. “Wow, you really have a green thumb!” they exclaimed in admiration. Then Linda sighed, “I sure wish I could grow house plants like this – but it’s just so…hard.” I smiled. “Are you kidding? I used to have a black thumb until I stumbled onto a little secret resource…” Answers to Almost Any House Plant Question (Who Else Wants The Happiest and Healthiest