Just finished installing a yard of multch,  I always have gone and bought the plastic edging only to have a stake come out causing that edge pull up.  I have a neighbor that has a landscape company.  I saw his yard and I noticed no edging or pavers to hold multch.  I asked him why, he said to just cut a line with a spade and fill that natural edge with multch.  Looks much better and will be easy to fix down the road.  Also add L X W X thickness to get an accurate Sq ft to get enough so you do not have to make serveral runs to Menards.
	
		
			
		
		
	
			
			 
				