I haven't used it to water cuttings, just to feed trees and vegetables. I've been rooting cuttings in HP ProMix lately, with no nutrients or amendments added, based on advice from other forum members. That's been working pretty well for me.
Hey James, if you click on the "other sellers" link on that Amazon page, you'll see that it's a few bucks cheaper from other sellers. Currently $21.12 with free shipping from Hydro Gardening Store.