Overburden is a soil mix that the Bushel Stop carries, it's a great all-around commercial potting mix.
http://thebushelstop.com/thebushelstopsoi.html this is as close as I can get you any info from their website, pretty useless without labels on that photo but its probably the top left or middle left sample.
The Ladyfinger is known as just that, that is the name it has. It's named and that's it's name. Others use the term loosely to describe small sweet fruits... but this banana plant in question is a commercial cultivar known simply as Musa 'Lady Finger'.
