yellow plants

PH Wert?

@No_Coast_Genetics yes i read all about salts, i washed one brick at a time in a large bucket = soak 30 minutes and rinse, three times each brick, and once the 5L pots was filled I did a improvised stop down type of buffer, with hopes the coco will stop down long term. yes i need a proper meter for coco pH. I keep going back to germination stage. in week 2 i describe how my seed and wet paper napkin was in a cupboard next to a laundry dryer fabric softener sheet. This might be why #2 plant is all yellow. might be an error on my part but now I have an understanding how seeds can be influenced. helps with directions for learning sessions.

You should be at 18/6, 13 hours of light is barely enough. Also, you need to feed them with grow nutrients, cal/mag and rapid start are not fertilizers for complete growth.

Did you wash the coir at all before use? Usually it’s already done, but if not there can be salt build-up from shipping/manufacturing. This might cause lockout from nutrients, even though you’re feeding n pH correctly. Just a thought but if it were my plant, I’d flush, possibly using a agent that helps strip built up salts. Also, using warm water for the flush helps with the breakdown..happy grows fam

Humm that is weird. I have not seen an auto this stunted 4 weeks in. It has the same growth amount as a 1 week old plant. Its insane. Tips I could suggest that might help them out, Lower temps. ideal is 26c max during day if possible and try and get around 20c at night. Maybe lower your Light? Im not skilled with HID's so that might not be the best option. As for yellowing, I'm not seeing to much of it in your pics or diary, new leaves are going to be a bit pale before they spring into action. I don't know if what your growing in has been fortified before, but they might need some food. coir does not have any natural nutrients in it, its void. and if it was not buffered it will leach calcium and magnesium. so keep up the calmg, I cant see any feeding schedules for nutrients on your diary just calmg and root booster, that might be part of the problem. Your are true that Coir needs to be between 5.5-6.2PH for liquid nutrients. Its goes up to 6.5-6.8 for dry amendments. Try giving your plants some food if they have not yet had it. and when watering use a larger container so then you can add in more water to bring PH back up vs using stop down. Best of Luck and Happy Growing

I see in your diary your ph is 6.5 in coco coir? It looks like ph issues buy yourself a digital pH meter that gives you a exact reading trying to use test strips is a nightmare and not very accurate keep it at 5.9 if your pH is out it will lock out nutrients your girls will be hungry and display all the mentioned symptoms I hope that helps best of luck with the rest of your grow 🌱 🙏 💚

i was told pH 5.9 so plants optimize nutrients absorption i always try my best to stop down to a greenish/ yellow to orange display with the dropper and sample tube. i have a concentrate stop down, i end up with pH 4 in a 4L and mix in a serving cup with pre mixed nutrients, so i am not over feeding because my two cal mag and root booster is both measured to moderate feeding amount. the stop down h2o is reducing meals amount.