February 1970

[dino]

Originally Posted by BklynBlue

Admitting no special knowledge of the events, listening to the available performances recorded after Munich, some just days after, it is apparent that the problems that would engulf Green did not begin right after Munich. The trips he took there may have been the catalyst, but their full effect still took some time to manifest themselves.

By all accounts and from recorded evidence Green was on top of his game as a musician a year later on the Mac tour of spring '71 when he replaced Spencer.
Also, even a Wikipedia page will tell you there is no such thing as "bad LSD". The dosage would be what matters like with any drug. And Munich was not the first or last time Green took the drug.
This legend is probably of more cultural importance.