sounds like you grew hemp what strain was it?
the onlt way i know how to make it concentrated is to turn the whole lot into resin oil using a honeybee extractor
this can also happen if you harvest too late because from previous reading i found there is like a 2 week deadline. if the strain takes 8 weeks to mature and you leave it for 10 weeks to flower it will begin to lose its strength pretty fast. would be nice to hear other growers opinions on this matter because ive never let mine grow that long.