I have been searching for the correct process for creating a "rock garden", but I have been finding mixed instructions.
Some say to create a foundation of small gravel and then build on top of it so that drainage will work properly.
Other guides say to lay down plastic lining then lay small gravel. Since the plastic lining will prevent unwanted grass and other plants from growing within the rocks.
What is the correct process for creating a rock garden that avoids plants growing through while allowing drainage?

