STS or Colloidal silver. No contortions necessary.or go through unbelievable contortions to hermie then try and pollinate.
As for keeping the Kerala small, I started the seeds in early August outdoors in quart pots so they would start to flower right away by the time they were small seedlings. August where I am is when the nights can start getting cooler and days are getting shorter so by the time the Kerala had developed into a one month old seedling it was September - full blown flowering season.
The biggest contributing factors to the plants being so small I would have to say are (1)starting the seeds late, (2)cooler temps, (3)shorter days in late August and September.