If you have a lot of wind storms, might need to encircle it with chicken wire or something so it doesn't blow over.
I harvest it by hand just cut off long stalks and stick in a vase till it's good and dry, then beat it against a bucket, then you throw it up in the air in front of a fan to get rid of the chaff.
Vacuum seal in mason jars with desiccant and oxygen absorber. Grind it when needed.