How does your Garden Grow?

How did everyone learn how to care for their yards and all the different plants in them? I have a yard full of who knows what- (all I know is that they are perennials)- and I have no idea what to do now that spring has sprung! Any tips on where to look or who to call?

Also- couldn't resist posting a few pictures of H- trying on my sunglasses- ok maybe I helped.