Yellow tips

@horsemouth it's this site that doesn't have advanced nutes listed properly I'm using the coco sensei 2 part formulas. It's 2 part grow phase and 2 part bloom phase it's not the grow micro bloom 3 part, @spacecadet I thought maybe iron or magnesium but was very unsure I had been giving Cal mag plus by advanced nutes but only once every 6 feeds or so is this not enough

i saw your journal now, sorry if i didn t look at it before. if you are giving only ph perfect grow without the bloom and the micro (like you wrote in your journal) ones its a deficiency for sure. if you look for the ph perfect grow micro bloom schedule you will see that the adv says to feed plants with all of them every time. it says: 1ml/l each in the first week, 2ml/l at week 2 and 4 ml/l from week 3.

Doesn't look like a p or k defeincy. To me it looks like an iron defiency. I had this before , so starting feeding calmag plus (has a little iton.), And all my problems went away .

So are you suggesting phosphorus and or potassium deficiency @horsemouth rather than an abundancy or nute burn,?

hi, 6 hours of dark are necessary for a good root development. i would add cal mag and i would give a little of pk. in my experience under qbs, like yours mars ts, plants need more k than under hps or cobs.

I have previous grow question without pics labelled same title with a bit more info from around 2am this morning so 12 hours ago please check this and comment again if you still think the same, thanks @MangoDudu

They are starting to eating more nutrient under a powerful light source, give them some light feed and the time to adaptate to the new environment and they will be great, remember to add some calmag under led lights, haven’t seen other open grow questions, if u have other question tells me/us, hope to be clear and usefull ✌️🏽💪🏼