i like roots excel n use it, it makes ur roots explode to the bottom nice n fast. but once they get there n are filling in, i use Rhizzotonic from canna it will make ur roots almost blindingly white n fuzzy as hell n that's 1 thing roots excel doesn't really do is make my roots full of fuzzy feeder roots. look forward to using A1's rooting product, maybe i'll mix a lil Rhizzo in there as well.