Intentional revegging after harvesting. Is it wise or a stupid idea to take say 15 of my most viable looking ones and chopping them to suit

Yes it’s called monster cropping. During harvest you only cut the side shoots and leave all the main trunk totally stripped. Re-vegging will be quicker. New shoots will start from all the nodes along the trunk.

Humic/fulvic acids will assist alot in breakdown of old roots or alternatively, apply a concentrated enzyme product (like CANNAZYM or Sensizym). Enzymes will aggressively digest the dead root material and turn it into bioavailable food for your next grow. 😋 In order to get a good 2nd harvest you need to give ample and proper time to "rest". Often times the reason for giving her a 2nd harvest is the idea that you can quickly ger a 2nd harvest for free, but its not true, there needs to be a dormancy period if you want yield and making the plant fully reveg and flower again is not a quick fix, things can get messy and involves alot of stress which if not kept in check will cause hermaphrodite quit easily. Yes you absolutely can, but there is no real benefit when time over cost etc comes into play. Therefore you are just better with fresh seeds. Alot of extra work, alot of extra knowledge required, alot of extra things that can go wrong. If it was simple as 2x yield everyone would do it. Gluck

Yes, this is absolutely a thing that people actively do, and it is known as "monster cropping" or "re-vegging" (regeneration). It works remarkably well with photoperiod strains, though it requires a bit of patience. When you harvest, the key is to leave the lower third of the plant intact, ensuring you keep some healthy green leaves and small, popcorn bud sites. You then switch the light cycle back to 18/6 or 24/0 and feed them a high-nitrogen vegetative nutrient schedule. Within a few weeks, the plant will start putting out strange, single-finger leaves before exploding into a massive, bushy structure. The biggest advantage is exactly what you mentioned: the massive, fully established root system in your coco is already there. Because the roots don't need to rebuild from scratch, the vegetative growth phase can actually explode much faster once the plant snaps out of flowering mode. However, you should keep two main things in mind before jumping in. First, the transition phase takes time usually 2 to 4 weeks just for the plant to reset, during which it will look pretty ugly and stressed. Second, look closely at the bottom of your screenshot. If you are growing autoflowers, this will unfortunately not work. Autoflowers have an internal genetic clock and cannot be forced back into a vegetative state after harvest. But if these are photoperiod strains, it is a brilliant and fun experiment to try. Happy Growing Growmie🌱

Buds on reveg plants are nowhere near as good as the original buds in my experience.....so again, it really isn't a viable option.

Possibly, but don' bother. Cannabis is an annual plant. If you were in a position to never obtain seeds again, maybe try......but....reusing coco is not ideal, the established root system will not "turbo charge" any new growths....all in all, it really isn't a viable option, otherwise professional growers would have been doing it for decades already. Cloning is the best method for preserving favorite strains.

well reveging a plant is mainly done to keep the genetics around, atleast in my circles, it mainly done to then take cuts from that plant for clones, not to reveg it then grow it out to flower. But it takes a while to do, its def a time/space commitment.

If it suits your purposes it's a useful option. Context dictates that. After you harvest, make sure to leave some leaves and growth nodes behind that can resume growing. This process takes a while. you'll get weird leaf growth and a crazy amount of branching that needs to be thinned out, but eventually it will return to normal vegetative growth. At which point, you can flower it again, too... once it grows out enough to warrant it. As far as normal production cycles, it's slower and a lot more time/effort than using clones or seeds. Also, just better off taking clones before flower for whatever purposes you have for them. If a re-vege makes sense, then go ahead and do it. You can re-used the coco or other media by other means. Remove roots and maybe flush it with some water to strip away any leftover nutrients -- if it was a soilless grow before. The cost of this stuff shouldn't be high... 3-5 dollars per pot usually isn't worth the effort to re-use, but each to their own on that.