Yup. Thatz pretty much what i do, except i blitz them in my old blender for a milisecond more faster break down (but yeah...shit is gone pretty fast whatever your method.

) Put down my blitzed comfrey on top of soil (or whatevers beneath it) ...then layer of worm castings as final layer ..BAM!!!....repeat every week (Thursdays to be exact

)
I also put in compost bin, worm bin and have standing water where i just throw bitz into....So versatile!
The jar one is new to me though...
Anyone else with ideas on comfrey?