I use the Sunshine Pro mix #4 with Agregate. Best thing I ever did was switch to that. It's basically just 65% peat and 35% perlite. There's some dolomite lime in it but it is basically an inert grow medium. Great, light and airy, absorbs water well but doesn't gett soggy. I add another 5% of the coarse grade pertlite so mine is around 40%.
I buy the large bales at my local nursery for $35.00. It equals around 8 bags of Happy Frog. You have to start feeding pretty early as Sir Ganga said, but the root development in this stuff is great!
I forgot my nursery closed for four mos. in the winter last year and the FFOF I used in the interim, sure hit my pocketbook a lot more.
I am stocking up and buying three bales this October!