I used to get searles “platinum” from my nursery and liked it. It has peat which keeps a bit of moisture in. Good for where I live. I notice now Bunnings also keep this as well as the Searles “premium“ which works and is similar to osmocote. Now I make my own worm castings and mix 50 50 with organic mix (sift out the chips) and some perlite. For the very best mate,,, get composting!!