Common issue among a few of my plants.

[awolace]

@Waira This last round I’ve had a few issues common between my plants. Brown circular spotting on leaves which I originally thought was the start of calcium deficiency but is unlike anything I’ve had before and especially not on multiple plants. The first plant I ignored the signs and it quickly progressed into this.

A couple other plants the deficiency didn’t really seem to progress and I just got a bit more spotting here and there.

As far as I’m concerned my feeding has been right and no different to what I normally do however my latest plant is showing issues now too. I have noticed that it is my smaller pots that are having the worst issues.


This is a 1 litre pot, around day 30 and I’m getting more spotting daily. Soil is biobizz lightmix and she is currently being fed 500ml daily of 2ml biobizz grow, 2ml of bloom and 1ml calmag per litre. One thing to note is my grow nutes are about 3 years old now. I don’t amend ph as they are organic nutes but ph going in is 6.5 naturally.

 

[Waira]

pardon the delay mate,... Please fill in that patient form in the yellow section above this one, there's more info I need,.... just copy and paste it here.... stuff like light type, model/maker, distance to tops,.. T and RH%,....

Bigger picture, organic nutes may not need to be pH adjusted, but whatever it is going in, just because it's organic doesn't mean the in-pot pH can't drift off, generally just less likely,... Get that Accurate 8 soil pH probe and that issue goes bye-bye! .... along those lines, each pot is it's own little world, even if all other inputs are the same,.. strain/pheno' differences can account for some differences in tolerances, preferences, behavior,...
.... Biobizz is pretty mild stuff, and usually I see basic lack-of defc.'s with there line show up here,... That top plant is still looking mainly Ca defc., which can have a mix of symptoms some of which overlap with P defc.,...might be some other defc.'s starting to act up, early symptoms hard to say for sure yet,....that yellowing is pretty generic for several others, but given how nice and fat those buds are- - I figure they are sucking up the P like crazy! I'd look into a P-K booster, even one that's not organic (faster availability),... a few light hits of it aren't going to change or ruin anything about the quality,... I finish with a mix of both, depending on who's barking for what and how much.
Hmmm, at 3 years, unless they are stored in the fridge or very cool, since they are organic based, it's quite possible they have degraded, or part of the line up at least,... knowing your fresh products look and smell is the best clue,....