Went garden store hopping today and came back with a question for the real experts. Lowes has Black Cow composted manure, and I noticed that they also have Black Velvet Mushroom Compost. The ingredients in the Black Velvet listed only Mushroom Compost (100%) and had a NPK equivalent of .5-.5-.2 . It was priced at $4.57 per 40 lb bag. Now, whatever I end up buying, I will be using to amend my leftover potting mix from last year (I'll actually only be reusing about half of last years leftovers)
So here's my question. Would it be better to go with only Black Cow, only Black Velvet, or a combination of both?
Now, I am not 100% organic, and probably never will be, but I do tend to "lean" in that direction.
I'd appreciate some opinions here.
Ted