I picked some of this up thinking i needed a bit more when potting and never really looking at the bag because it has a huge "PERLITE" on the bag so i got it, right. Well, i used it for filler after the soil (Pro-Mix) compressed with water and noticed after the fan blowing it around some and it landing on a couple leaf's and causing small brown spots I got to looking at it again and it is enriched with Miracle-Gro plant food. Has the following in it they say. Nitrogen (N) 0.04% 0.016% Ammoniacal Nitrogen 0.024% Nitrate Nitrogen Available Phosphate (P2O5) - 0.01% Soluable potash (K2O) - 0.06% Derived from ammonium nitrate, ammonium phosphate, calcium phosphate, and potassium sulfate. Until last night,I haven't fed them a thing other than the Microise in the Pro-Mix Bx but my plants are doing very well and I just discovered this morning that the MG Perlite is loaded some, lol. Just thought I'd bring it up as I haven't heard anyone talk about it but this might be a good thing for autos because I am pretty impressed with what I'm seeing so far and wonder if it would be the same if I didn't happen to use this stuff by accident?