Overwatering or underwatering? Please help

It was underwatered. I appreciate and the love and answers. This group is the best!

Coco has enough aeration naturally that it’s near impossible to overwater. The red stems, not just petioles, but actual stems point towards deficiencies all around as well..

The best way to tell with coco coir is to check the weight of the pot/plant. If it feels deceptively light then she needs a water. Personally I try and let the soil dry for a day then giver her a good water, the plants love it as the roots hate being damn all the time, it also stops gnats and other pests from living in your soil as these pests depend on a wet substrate to hatch their spawn.

Is this your Purple Punch grow? I'm going to assume it is... First and foremost, you're not watering it enough... you have to keep Coco Coir wet all the time... so your average daily water (.4 gallons in a 5 gallon pot at this age!) is far too little. Along with the drooping, the red stems are telling me this is really stressed out - and I think I'm also seeing some signs of nitrogen toxicity... Your nutes are a strange choice for growing weed... you aren't growing vegetables or roses ... your vegetable nutes and the bat guano are delivering far too much nitrogen for weed at this stage of life... and the amount of Potassium and Phosphorus is certainly not enough even when you combine all the various nutes you're providing - eventually, you're going to start seeing deficiencies of these very important nutes. And finally, I'm not seeing any information on the pH levels you're maintaining... are you measuring this? Are you getting any runoff when you give plain water and are you testing THAT for its pH level? When you give plain water, you need to give enough that there is about 10-20% runoff - this helps clear out excess nutes and salts - and you need to water/feed generously every 1-2 days - Coco is/should be like doing hydro in "soil." I would suggest looking for different nutes... search this site for grows done in Coco Coir and look at some of the really successful grows - see what nutes they're using, message the growers for THEIR recommendations - or put up another question here asking the general community what nutes they would suggest for Coco grows... then do some research and find a line you feel comfortable trying out. Meanwhile, start letting these ladies have a decent size drink... and until you find/decide to use different nutes, at least get rid of the bat guano as it is the one piece of your nute program that is giving far too much nitrogen... Good luck!

looks like very dry coco. best way to judge is by the weight of the pot (easy to be consistent this way). allowing surface to suprficially dry is about as far as you want to take coco. if you have 70/30 mix of perlite it'd be nearly impossible to ovewater with volume. as long as enough "dryback" occurs, you won't overwater coco due to frequency. ovewatering.. either frequency or too much in one sitting -- one will cause weird symptoms in leaves, the other will cause it to droop like crazy as long as the roots are deprived of O2.. never sure which ppl mean by overwatering, but knowing the cause and effect of each is better than knowing the vocabulary. this doesn't look like it fits either description. amendments? so not a full soilless grow? usually you'd fertilize with each irigation with 10-15% runoff, which maintains concentration of nutes in substrate... with a proper amount of perlite mixed in and properly sized container, you can even do frequent irrigations per day without any issues. you need enough dryback to occur, so you end up with slightly smaller pots and definitely would need an automated system due to labor involved, but this would match or nearly match the best hydro setups. irrigating with more dryback will have great results too, no worries.. and i'd recommend learning that first before taking that next step. (and, you may be going in totally different direction with amendments and maybe some sort of living soil type thing? an equally cool way to grow for different reasons)

Using Coco coir. Just added amendments and transplanted.

What kinda soil you using? It looks problematic.. looks very dense and clay-ey..