See this thread: Grow Dr. Grinspoon
I grew indoors in coco. Daily watering/nutes. Never higher than ec 0.8. LED lighting (fixture + strips) around 700w. Light - 18/6 for 5 weeks. Then 12/12 for months. The last 6 weeks was 10/14. It stretched like a MF. Seriously. Multiple arm size bud stalks that grew 10’ - 11’.
My advice. Start from 12/12 & grow it in a small pot - 3-4 gallons. Switch to 10/14 late in harvest if you get there.
From my experience & others on another forum, this latest batch of Dr G no longer has the ‘pearl’ pheno. Charles S (reeferman) says he is doing a side-by-side grow of these new seeds & some old Senor Garcia seeds (aka Dr Grinspoon).