Here are some excerpts regarding the founding of the California Green Party
The Green Party of California (GPCA) was founded on February 4th, 1990. It achieved ballot status as of January 1st, 1992. It has maintained ballot status ever since.
The Founding Meeting (February 1990)
The founding meeting of the GPCA occurred on February 4th 1990, at Cal State Sacramento. Approximately 65 Green delegates and observers from 30 Green locals gathered from across California and debated whether to start a new political party. The meeting was co-facilitated by Mike Feinstein (Santa Monica, Westside Greens) and Mindy Lorenz (Oxnard, Santa Clara River Greens).
The Ballot Drive (January 1990 – December 1991)
To qualify for an ongoing place on the ballot, California Greens needed to gather a number of registrants equal to 1% of the number of people who had last voted for Governor (in 1988) – that number amounted to 78,992.
By December 1st 1991, registration had reached 60,000 and the goal was near. Then a large, last minute large donation came in that would help pay to hire some professional registration gatherers. This spurred Greens on even more furiously, with the added confidence that the needed total would be achieved. After registering 60,000 people in the preceding 23 months, Greens registered 40,000+ people in December to ‘go over the top’ and reach 103,903, securing a place on the ballot for the GPCA. About 65,000 came from Northern California, evidencing the strength of Hoffman and the Q Group’s efforts there, as well as reflecting the strength of the Green movement in Northern California.
The complete story can be found here http://www.cagreens.org/history/founding