Sometimes they were slackers and didn’t last long but it was mainly a lot of inexperienced people. I would train them but we all know how overwhelmed a new groundie can get with all of the things to learn plus being proficient on the ground. There were seasons where I had a good crew and would destroy work and I’d be out of a tree in no time. I have the tendency though that once I get up there I don’t like to get down until the job is done or it’s dark
If new, and being trained (inexperienced), and working safely, it sounds like they took the right amount of time while being overworked by "the man".
This is what leads to so much danger in tree work.
You might consider that you wanting to stay up in the tree for that long of a time period is not very wise, even if you want to do what you want to do.
This is the age of rope-walking. You can be back up the tree in a jif. Alternately, with that many ground staff, you could be carefully, manually pulled up the tree on a rigging line, while on a climbing system in 1-2 minutes.
Going down to do hands-on, real-time mentoring, showing them how you do it, offering up how others approach the similar tasks while doing those tasks help understanding and retention.
Walking them through it, explaining your reasoning and approach, step-by-step, is invaluable. Follow that up by walking them through it, explaining your reasoning as you go, and asking them to explain what they are understanding as the reasoning is another step. Then, let them run through it, explaining their reasoning, only interjecting if needed for safety, will build confidence, depth of understanding, and integration.
Remember, they may be trying to learn with a BPM of 100, with a lot of adrenaline pumping. Great for fight or flight, not great for learning.
$0.02 from training newbies for 18 years.
I tell people that doing tree work is for almost nobody. You will definitely have to sort through the trainee pool. Some people are just not up to it. Others need teaching in all different ways.
Do you have any non-production staff training sessions/ days?