Depending on things like how heavily planted your tank is and how frequently you do water changes, anywhere from some to almost all of the debris could exist regardless of the substrate. It's a good idea to wash *all* substrates before using them, as you won't find a substrate that doesn't have many reviews consisting of "It's really dusty". Some, of course, are much worse than others, but if you're looking for a substrate that you don't have to wash to get a clear tank, it just doesn't exist.
Substrates that come with nutrients is a whole other issue. Unfortunately, most substrates that *claim* they come with nutrients, actually don't. I know that ADA does, and at least some substrates that come wet do (though not all), but if it's reasonably priced, you can pretty much bet that it's completely barren of nutrients. However, regardless of nutrient content, and regardless of CEC factor (the ability to absorb and hold nutrients), you can still grow *anything* that you want, so long as you provide appropriate lighting, CO2, and nutrients. And anything you could grow with Flourite, you can grow with whatever you want, as Flourite is nutritionally dead.
So, pick a substrate that you like the look of, rinse it thoroughly, and regrow whatever you want!