Looking good.
Yeah, they may take a few weeks to get mature enough to flower.
I think counting from first pistils is a good way to work on to estimated maturity.
In my experience, most photo plants need at least 3-4 weeks veg, even if 12/12 from seed.
Are they 1L pots? Why restrict them? You want to keep them small / manageable?
I think I've worked out what my La Buena Hierba mystery strain 2 is -- the Thai Gold Photo.
18 days inside, then outside, showed pistils at day 31 or so.
But, it's June, and another 2+ weeks later, I'm not sure if she's in flowering or veg!!!
Maybe continue to veg on for another few weeks, or months.
Haha, joke's on me. May have a sativa-Thai dominant photo plant outdoors for a few months in a 2 gal pot!
View attachment 1203005,
Either that, or she is flowering, but will just take a few weeks to stretch and build her bud structure.
Wish me the best to keep her going until the end!