if you're on Long Island, you drive by Miracle Farms every time you visit, at the corner of the Neck Road and rt 25. One can see various mulches and soils in the concrete bins they have at this site. Since its so close, maybe you can save on the delivery charge? However that large and new fleet of dump trucks looks like a high-overhead operation to me...
(603) 253-9292
http://www.miraclefarmslandscaping.com/