Why do you need to keep helping? What's holding them back from learning without you being around all the time?

Have you tried handing your direct reports a few tasks and checking back after a week?

With a new inexperienced hire, I start off by black boxing everything and just telling them input / output. Write the innards. Once they have a few wins under their belt, I ramp up the scope of the projects and that works pretty well. I only step in if it's some strange problem none of us have ever seen before and we're up against a tight deadline.