Those plants are looking really good. Congrats. You're giving them lots of food (light is how plants make food).
And thumbs up on the Jacks' — I switched to Jacks after a few grows. Works just great.
There's nothing magic about growing autoflowers though I do understand the complaints about the results from years ago (> a decade, it seems).
Most seeds we buy are hybrids of indica and saliva, created by growers who want to include certain characteristics from those two different strains. Autos have genes from ruderalis included with the indica and sativa genes.
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One of the photos has autoflowers, the other two are photos. Which is which?
Re. pruning - my practice has been to remove only leaves that are heavily senesced, that are damaged, or that are blocking air flow. Other than the, I'm at a loss as to why I would want to remove leaves from a plant. As cannabis leaves get older, they lose their photosynthetic efficiency and move closer to becoming a net photosynthetic loss. When that occurs, the plant will start to draw nutrients from the leaf for use at the top of the plant - that's what we see as "senescence". If you remove those leaves, the nutrients will not be available.
I'm far from a "nature knows best" thinker - nature takes a lot of wrong turns along the way (that's the idea behind evolution, right?) but when it comes to removing leaves from a plant, I leave (pardon the pun) most of them on the plant one reason being that researchers get a quizzical look on their face when asked about it and I've never seen any robust evidence that removing leaves, other than for the reasons I've mentioned, increases crop yield or quality.
Top two pix are photos, the bottom one is autos.
Top picture is the result of a truly staggering fuckup on my part due to adding hydrogen peroxide to my humidifier water to stop algae from growing. I was so pleased with myself that I didn't have to clean the humidifier that it wasn't until a few weeks too late that I noticed how much I was adding* and then pruning too much of the plant away because of an irrational fear of bud rot. Totally stepped on my dick.
Second picture is my first photo grow - which I lost to bud rot (which is why I over-did the pruning on the plant above)
Third is a couple of autos. They're beasts. That grow ended up using three lights and yielded 699 gm/24.7 ounces even though my average DLI was only 49mol.
*I refer to it as a
"Claus von Bulow" moment.