Oh yeah, “Green Tambourine” was psychodelia for the rest of us, none of the pretentious trash of the Dead, Jefferson Airplane or the Cream.
In 1968, "Boss Radio" KHJ, at 930 kilocycles, was the Los Angeles area's premier rock blaster. "Green Tambourine" shot up the station's "Boss 30" chart, reaching Number One on January 24, but remained there only a week before Paul Mauriat's "Love Is Blue" knocked it off--and then it rapidly faded.
The Jefferson Airplane got a lot of airplay on KHJ the previous year, and the Cream did well on the Boss 30 in the spring of '68, but you probably had to listen to FM to hear the Dead, and in 1968, no one in my family had a radio with an FM band.