Comfrey outputs the most annual biomass production of any terrestrial plant.

It'll increase your compost quality, 

It's a pollinator haven as it produces hundreds of pink and purple flowers.

Chickens like to eat it as well.  

 Great tip thank you 

 "Comfrey outputs the most annual biomass production of any terrestrial plant."
How about Bamboo? 

 Cut bamboo and see how long it takes to comeback 👀