Fertilized soil??

[GotHerps?]

Just joined the forum and I'm lovin the info so far. Lots of good knowledge here. I just built a vivarium for my juvenile water dragon, and now I'm working on one for my small Basilisk lizard.

So I have a question about soil. I've got a false bottom made of plastic, then a 2 inch layer of pebbles, two layers of mesh screen, then I'm doing soil on top of that with live plants planted in it, namely a small sago palm and some other tropical plants. I was originally going to use Miracle Grow Moisture Control because that is what I use for other plants, and I thought it would hold moisture well and help with humidity... and I have a bunch of it. Then I thought about fertilizers in the Miracle Grow and didn't know if this was a big no no! There will be a rain system in it and water also gets circulated by a filtered waterfall.