First of all, is this a good friend ? kidding. If I were you I would keep the plant, think of it as an opportunity to learn something new, increase your knowledge, gain experience.
As someone pointed out earlier, you may wish to amend the soil before you do anything ... when growing outdoors, it's all about soil & worms.
Regeneration: technique of using mature plants, whose ripened buds have been harvested, to produce a second harvest, can be indoors or out, mostly out. (ref. Ed Rosenthal )
How to ... outdoors : when harvesting the plant, leave parts of some branches, leaves, small buds, intact. Next you want to mimic the same light regimen that plants like during veg, to regenerate .... indoors, just leave the lights on all the time, outdoors, night cycle interruption does the trick.
Plants will start regenerate, initially, odd shaped leaves, in unusual places, is pretty much common place. I have found these plants to be more vigorous/hardy than most. End result, in my case, quality of regenerated plant vs. quality of non-regenerated plant of same strain was not noticeable to those in my circle.
Hope this helps. Have fun and happy growing.
