[lubadub]

If I wanted to learn how to look at my plants to develop an idea of what is missing in my soil and what the plants need. Is there a book I can buy or a place I can go to develop these skills? I need to learn from a "plant talker."
How many of the growers here know how to decide what to feed their plants based on how they look? I know one person who says his plants tell him what they need. He never gets a soil test, grows organically and has fantastic results. He is unwilling to disclose his secrets.