Open Top SWC with Raybo's 3:2:1 Mix
In my obsessive build up to the 2012 gardening season...go ahead you can admit you are chomping at the bit as well...I have really learned a lot, I mean a heck of a lot. With learning however, comes questions, and even after reading thread after thread some specific questions don't get answered, so lets hear your thoughts.
Last year, I used MG Potting Mix in my SWC's. I used a double bucket, with one lid acting as the "mulch" with holes cut for the plants. The Earthtainer recommends plastic mulch ( garbage bag ). I have also noticed some folks just going open top in their SWC's. The question is, outside of potential water saving and weeds finding their way in, is there an advantage to a closed top to the SWC?
In a well draining mix like the 3:2:1, would the open top be a negative? Would it potentially dry things out?
I am getting into probably almost meaningless details now, but it was a concern I had, so I wanted to see what all you internet-land folks thought.