I would recommend H&G Roots Excellerator
I got rootbound plants in 2 gallon coco pots day 50 of veg
I'm not trying to tell anyone to switch to H&G, but two of their products are really good, and can be used with any other nutrient line. Drip Clean and Roots Excellerator. If I switch from H&G I will still always use those two additives. RE is expensive so use it only in veg when you are trying to grow roots, and stop using in flower to save alot of money. Use drip clean througout, its cheap since its so concentrated