I saw a few quotes in her bio that perfectly describe her intense Air Grand trine with her 12th house personal planets and Neptune and the Saturn/Uranus conjunction in her 3rd.
She had an intense inner struggle because she had a strong desire to be a rock singer, but she was afraid she would fall into drug addiction if she did so. Her first attempt at joining a band in San Francisco ended with her being near death from alcohol/heroin use.
In 1963, Joplin was arrested in San Francisco for shoplifting. During the two years that followed, her drug use increased and she acquired a reputation as a "speed freak" and occasional heroin user.[13][16][21] She also used other psychoactive drugs and was a heavy drinker throughout her career; her favorite alcoholic beverage was Southern Comfort.[citation needed]
In May 1965, Joplin's friends in San Francisco, noticing the detrimental effects on her from regularly injecting methamphetamine (she was described as "skeletal"[16] and "emaciated"[13]), persuaded her to return to Port Arthur. During that month, her friends threw her a bus-fare party so she could return to her parents in Texas.
Back in Port Arthur in the spring of 1965, after Joplin's parents noticed her weight of 88 pounds (40 kg),[22] she changed her lifestyle. She avoided drugs and alcohol, adopted a beehive hairdo, and enrolled as an anthropology major at Lamar University in nearby Beaumont, Texas. During her time at Lamar University, she commuted to Austin to sing solo, accompanying herself on acoustic guitar.
In 1965 and 1966, Joplin commuted from her family's Port Arthur home to Beaumont, Texas, where she had regular sessions with a psychiatric social worker named Bernard Giarritano[22]
Interviewed by biographer Myra Friedman after his client's death, Giarritano said Joplin had been baffled by how she could pursue a professional career as a singer without relapsing into drugs, and her drug-related memories from immediately prior to returning to Port Arthur continued to frighten her
Giarritano tried to reassure her that she did not have to use narcotics in order to succeed in the music business.[22]
She also said that if she were to avoid singing professionally, she would have to become a keypunch operator (as she had done a few years earlier) or a secretary, and then a wife and mother, and she would have to become very similar to all the other women in Port Arthur.[22]
The above info sounds very much like her Grand Trine. The Saturn/Uranus conjunction was her inner struggle, with not wanting to be too Saturnian, and being a secretary, settling down in her hometown forever. She wanted the Uranus excitement of following her rock star lifestyle, singing on the big stage and being known for her talents.
But that came with the trine to Neptune, which was overwhelming for her. Her Mars squares Neptune and has no other major aspects. She had no boundaries or self control when it came to drugs alcohol:
1966--
Due to persistent persuading by keyboardist and close friend Stephen Ryder, Joplin avoided drugs for several weeks.
She made Travis Rivers, with whom she shared an apartment upon their arrival in San Francisco, promise that using needles would not be allowed there.[22]
When bandmate Dave Getz accompanied her from a rehearsal to her home, Rivers was not there, but "two or three" (according to Getz' recollection 25 years later) guests whom Rivers had invited were in the process of injecting drugs.[22] "One of them was about to tie off," recalled Getz.[22]
"Janis went nuts! I had never seen anybody explode like that. She was screaming and crying and Travis walked in. She screamed at him: 'We had a pact! You promised me! There wouldn't be any of that in front of me!' I was over my head and I tried to calm her down. I said, 'They're just doing mescaline,' because that's what I thought it was. She said, 'You don't understand! I can't see that! I just can't stand to see that!'"[22