/diy/ - Do It Yourself

I'm a simple city boy who recently started to get increasingly interested in gardening, foraging, permaculture and the simple appreciation of the nature that surrounds me. What are the best online sources you have to learn the basics of gardening, the biological processes behind this magic scenery of life? It's just waste of my brain to learn each requirement of each plant, I want a fundamental understanding of gardening, so that I can predict and speculate what will happen so that I don't have to start from scratch with each plant I put to the ground. You know?

Give me some nice links, please, will ya?