Setup:
Strain: Doc Chronic's Lowryder (no LR bashing, please)
Age: 24 days
True Aeroponics Rig. <50micron mist at 70psi.
Cycle time: 1minute on, 4 mins off.
400W HPS about 18" from plant tops.
Res Temp: 66F (external chiller)
Room Temp: 80F
Humidity: 40%
pH: I keep it between 5.6-5.8...occasional jumps to 6.4/6.5 during the overnight before I adjust down again in the AM.
ppm at the time of this pic: 900ppm
AN nutes using Sensi 2 Part 2+Bloom - Light Feeding schedule.
I'm also using Hydroguard, so root rot isn't a possibility either (or at least I though that was the point of hydroguard, anyway)

I started with 5 plants. 1 died the same death as this one.
Down to 4 plants, 2 males, 2 females.
This one was a male so it's no great loss, but I'd like to know why this happened, if possible.
The other 3 plants are doing GREAT. Getting nice and bushy and green. No signs of nute deficiency or pH problems or over-nute. Nothing.

Yet, this plant, the first main leaves turned yellow, almost the color of a ripe banana. It didn't start at the tips or base or anything, just the whole leave turned yellow and the whole plant just started to "droop".

The roots were doing great up to a point and then this plant just "stopped" and slowly (over the course of about a week) just croaked.

I went through all the pics in the Sick Plant FAQ and the only thing that really looked close in terms of the drooping was overwatering, but I didn't think that was possible in aero.

Sorry I don't have a better pic. I can't find the FAQ on color correction for HPS lamps, since OG is no more.

Thanks in advance. Any help would be greatly appreciated as this is my first grow.

Here's the dying boy:


And here's the other male in the exact same rig with the exact same everything.

[4iiii'z]

Originally Posted by flgreyhound

ppm at the time of this pic: 900ppm
AN nutes using Sensi 2 Part 2+Bloom - Light Feeding schedule.

Light Feeding schedule. ?

try 1/4 strength
watch your ppm
if it rises = the solution is too strong
if it drops = add more nutes

I've been following AN's Sensi 2 Part - 2+ Bloom - Light Feeding schedule. This was recommended by Dr. Chronic as he said that's what he uses, since LR has no real vegitative period since it's an autoflower strain.

So...I've followed the schedule to the letter. I'm on week 3 of the schedule and according to that I should be at 1133 PPM right now and I'm pretty much right on that. When this pic was taken it was during week2 and I was supposed to be at 1066ppm, so I was actually a bit low at that point.

I change nutes once a week and flush with plain RO water for 24hrs before the change. The other 3 plants look totally healthy and for the first 2 weeks even the one that died look good.

Also, the PPM tends to hold pretty steady over the course of the week. It may rise by 100PPM, *if* I don't add any RO.

I'm not going to lower the PPM, now as the plant is dead and I've pulled it, but I was looking more for a "post mortem" if you will......if possible....so I might keep this from happening in the future.

[4iiii'z]

"post mortem"
AN Feeding schedule, doesn't work for every one
myself included.
I get great results "dialing in to the plant"
start 1/4 strength & gradually increase it - to the plants needs
ppm never goes above 800

Ok. I'll be the first to admit I really don't know what I'm doing. I mean, yea I've read tons of posts but this is my first grow, ever. And I know I probably made things extra complicated by using AN and going Aero, to boot!

But the thing that doesn't make sense to me is why one plant would die and the others would be just fine....flourishing in fact?
All plants are/were the exact same age and same strain....that's why the PPM answer just doesn't seem right to me (not that I doubt anyones expertise)...just trying to make it all "add up".

[MynameStitch]

yiour plants are hungry thats whats wrong you need to up your ppms (food) do you knwo what your ppms are now?


howo ften are you watering them? how often and how long are they getting misted?

serious nitrogen dif,mag dif, under watered. give him food. r these for breeding purposes??

At the time that I posted the pics, I was at 900ppm. That was only at day 24 from germination and I personally thought 900ppm seemed a little high, but that is the AN Sensi 2 Part - 2+ Bloom - Light Feeding schedule which Doc Chronic said he follows for Lowryder.

That male has since been taken to the compost heap. The remaining male and the other 2 females continue to flourish.....which again makes me find it a little hard to believe underfed/underwatered. I thought they would all show signs of such....but this was the only one.

I am now at 1200ppm.

Misting cycle is 1 minute on 4 minutes off.

No, they're not for breeding. This is my first ever grow attempt and I choose Lowryder as it seemed "easy" since it's an autoflower strain. I've pulled the remaining male and he's joined his brother on the compost heap.

[Blackmelo]

hmm, not that I know much about nutrient amounts in ppm but I know another gardener who aims for a 200-300 range and u r at 1200...

Well you've been told you are using too much and too little nutes.

Maybe I am wrong but a plant does not die like that in less than a week from underfeeding if ppms are above 900.

Therefore I would also go with nutrient levels beeing too high and the plants dying from overfert.

Actually, now, it's kind of a moot point as that male is dead and I pulled the other male.

However, not to be argumentative, but as you pointed out I've been told nutes were too high and also that they were too low.
Either way, I keep coming back to the same point in my thinking which is if it were a nute high/low issue, why did only this one plant die and the rest thrive?

Someone else suggested an issue with less than perfect coverage in the misting. That seems, at least to me, the most plausible explanation....though I was pretty sure they were getting adequate mist, but I can't swear to it and at this point there isn't much I can do about it as I have plants in the rig so can't take it down to work on it. I'll prolly redesign the rig after this grow.

Thanks all!