My Concord grapevine. I let it grow wild for 10 years. A couple years ago I cut it back to the main cane and (2) 3' main arms. I bought some netting to keep the Japanese Beetles and birds from ruining the harvest. Some jelly and a bottle or two of wine are my plans for the grapes.
I think most people that grow autos do so because they just can't bear the thought of the flowering period taking a couple weeks longer for a photo plant.
There are a handful of trimming & training methods to keep a photo plant's height to a minimum.
This only addressed the photo period issue.
Here's what I did: https://www.thcfarmer.com/threads/whats-your-plan-for-the-next-time-you-lose-power.136705/
Those 18" wide aisles are going to nearly disappear when your plants fill out. You'll be rubbing and bumping your ladies every time you try to move around them. Good luck .
20'x20' = 400 square feet
(8) 4' x 8' tables = 250 square feet
Assuming a 2' wide aisle separating your tables means you have a whopping 75 lineal feet of aisle available. How ya gonna make that work?
Assuming you'd have a walkway around the perimeter of your grow, you already have a 5'...
Sounds to me like your humidifier isn't working right. Either that or you have a leak that's letting the humidity escape the tent. Even the smallest humidifiers they make should have no trouble keeping a tent at a set humidity around 60%.
What humidifier are you using?
The amount of yellowing looks like it increases, going from the top branches to the lowest branches. Is light stress more apparent on the top leaves closer to the light, or more visible down low where nutrient uptake is?
Three rows on top, two rows on bottom. I have two more plants left in the grow room to harvest. One plant fills up one row of fishing line pretty well.
I think some of my other plants will smoke better than this one, but I can't complain about the production on this stretch 😁. The LED light I used bleaches everything out and make the stigmas look white. -They're not.
The top of your main cola seems to indicate that something's outa whack. The top couple inches look like it's doing a spindly reach for the sky. That might be a lighting issue but I don't know for sure. More experienced growers might chime in.
Probably just under 2 oz for this gal but the quality seems to be there. I still have 7 more under the light and a couple of those probably have four ounces or better on them.