I would definitely add the perlite. I am using the same soil and it seems to brick up a lot, doesn't have the best drainage. I am very mad I didn't originally add perlite for my sprout but I definitely will for when I transplant my babies. Someone suggested to me 2 to 3 parts soil /// to 1 part perlite..
When using miracle grow the only good soil is the MG moisture control.I have tried alot of the mg soils over the years and only the moisture control has good results.Dont add any nutes just water with ph 6.7 water
I actually started with MG Organic. Throw the soil in incriments into the mircowave and nuke it, mg organic is known for having live bugs and shyt in the soil, it's better than mg time released shyt.. but there is MUCH better soil out there...