ive never used happy frog. ive had a few attempts at growing before and things just went to shit. so thats why i consider last year my first grow. it was successful. i used roots organic before when i had a mh/hps going on. i loved it. it dried out really fast and thats one thing that i do like. i like fast drying soil when they are in small pots mainly cause i can water them everyday and feed every other day, as opposed to having some shit that holds a lot of moisture and you end up feeding less often. but last year i had 2 65 gallons. i bought 5 large bags of RO and mixed it with only a couple pounds of each of the listed amendments. if i had the cash i would go with RO, mix with soil amendments, add some peat moss and coco or something to help retain moisture. not sure but im thinking of having the holes come up from the ground about a foot. then when they get taller i can clean the bottom up and fill the top with native soil. shits terrible but its really compact and i think it will help with the soil drying out
Native soil
Compost soil with a little bit of amendments and perlite
compost soil/other soil more amendments and perlite
compost soil/other soil, native soil, amendments and perlite
thats how id like my soil to look this year. layered from top to bottom.