This is going to require extreme sterilization and environmental control in the early phase, but is very doable..
All plant cells are actually capable of undifferentiating, especially if auxin is abundant apparently, but the best callus formation would still come from undifferentiated root, or meristematic tissue..
Just like typical cloning, you'd be VASTLY more successful sarting with tissue we typically consider clonable, but with proper setup success with more differentiated tissue is far more probable with the sterility of this method..
Technically, this method could reproduce the plant that mothered a bag of chronic, but it would be far from the easiest tissue..
I might play around with this for giggles.. I have experience propagating yeast from trace sources in the home lab.. I'm not too keen on buying any kits though, I wonder how obtainable, or substitutable the culture constituents are..