Amnesia Lemon Auto by Coastal Genetics

If you’re worried about light height - check out this app called Photone.. I suggest it to growers often. If you have to spare for an in all purchase, it gives you a par meter from your phone that gives you a PPFD read out. It’s very accurate I’ve researched it and seen reviews of it compared to the benchmark apogee instruments. In veg I like to have at least 500 PPFD, and in flower at least 800-900. Everything else looks pretty on point, sometimes you just gotta let those bushy ones grow out a bit before you can really LST properly.

I use Armor Si. Always mix it into plain water first! No other nutrients. Mix it well, I use the full strength NOT the maximum strength. It's the middle dose at .5ml a liter. Then add your nutrients as normal. Stop using pH up if you use Armor Si. You need to use Armor Si as your pH up now. 1 single drop at a time while mixing the nutrients solution ( yes everything pre mixed already) you have to do this slowly and check the pH every few drops because it will go up super fast. As long as your mixing 1 drop slowly while stirring you won't create a lockout. I've used a ton of Si and barely burned a plant after adding way to much pH down. It was well worth it. The stem on the plant is really thick at only 4 weeks old lol. If you use it as a foliar spray you need to really dilute it a lot. It will burn your leaves if it sits to long. I started out using it as a spray and kept burning leave so I dialed in mixing it. Just my personal practice.

I find mine take off around the 4 1/2 week mark. If you give them excess light they will keep the nodes tight. Best of luck the rest of the way.

I’d lean more towards 3 or more than the 2 daily you’ve outlined.. It will take some time and adjusting to find what works but I would want more than just one feeding while lights are on if I had a system set up like this.. in fact, it makes sense to go ahead and do 4 or 5 if you are gonna step it up from 2 daily. Sticking with 2 daily seems hardly more advantageous than manual watering once a day.

If these were underneath growth and you just topped them or exposed them, i wouldn’t be worried. They’re at that point where rapid growth is happening and flowering changes are beginning.. sometimes you’ll see some mild deficiencies show up that shouldn’t be overreacted to IMO. Keep an eye on it but I wouldn’t take any steps like adjusting feed just yet.. luckily you’re in coco so any adjustments made in the future to remedy any issues will take effect quickly.. Give it a few days and go from there. They’re looking good and your feed numbers seem on point for your set up and it being an auto. A lot of ppl over dose autos.