Hi Horizon,

Phalaris is easy peasy to grow. Lots of water, cut when bluish.

I don't have any info on determinging the presence of gramine other than TLC or something similar, but do suggest you get rhizomes of a known clone, like Big Medicine or the phalaris aquatica clone who's name is escaping me now. You might look into Share the Seeds. Pretty sure you could get either or both clones no problem.

Welcome to the Nexus! Very cool you're into growing your own.

Peace,

Continuum