The remnant Mulanje ME looks increasingly like poor Mulanje from last year did at the end. Is it some kind of lockout? Is that the same pot of soil poor Mulanje had last year? If so, that might be part of the explanation for this. If that is the same pot, I would consider starting a new batch of soil for next year.
Your other two look wonderful, you will definitely have a good stash!
Thanks Emeraldo, yes I should still do well from the other 2 plants.
Last year's Mulanje was a total collapse. And yes I think it was the same pot but I find it hard to blame the pot/soil when this year's Mulanje ME (to my eyes) looked healthy and well, and her sister plant the Mulanje HP got the same treatment and had the same collapse and the same watering but then recovered fine.
That looks like an animal pissed in the pot, or you accidentally used a dirty bucket to water her.
I have only seen entire plants do this from cat piss, toxins in the water, or from a bad foliar spray.
My money is on a cat using your pot.
I would heavily heavily flush her. Then drain the reservoir and let her sit for awhile before watering.
Let her dry out after flushing to give the aerobic microbes a huge dose of air and a chance to clean up the soil.
Then in 3 or 4 days flush her again. What do you have to lose?
2 huge flushes, then a dose of calmag, or whatever liquid calcium you have, just to reset the soil's electrical system.
If you are patient and flush slowly but use a lot of water without disturbing the soil, as in watering very slowly so your runoff isn't violent, most nutes will stay in the pot.
Flushing will lower calcium though, as calcium is very mobile in soil. It flushes out.
I would start by laying plastic over your soil, then rinsing the entire plant but don't rinse it into your soil, then flush the pot.
If you decide to cull it, I wouldn't compost that, just throw it out. Soil too.
Have you stuck your nose into her soil? See if you smell piss or ammonia.
Thanks Gee! I am pretty sure no cats/animals could have used my containers as a toilet. There is no bad smell from the pot or the down pipe, nothing.
Last year when the Mulanje collapsed, it had a similar lead up, hot summer heat, strong training, and had been watered multiple times over the day whenever leaf wilt was showing. I should add that on my last grow I did the same to all the plants and when that happened to the Mulanje I stopped multiple waterings and no harm was observed on the other plants. But this year's grow I did it again because I thought the air/oxygen supplied by the aeration chambers would help mitigate any excess watering (I now conclude that I was wrong about that).
This current grow the same, I mentioned previously of the strong tension in the branches from LST training to 'contain' the canopy size. There is so much more stored energy/tension in a large plant where branches are contained and held by strong wire. I am now rather wary of this strong bending training because I feel I am observing that when large plants receive it they look like they lose their 'spark' afterwards.
At least one large branch I found to be cracked at the base of the trunk which no doubt relieved some of the tension from the training but did that injury let infection in?
The collapse visibly occurred within minutes of a watering, after probably a couple of weeks of multi day waterings.
Before I set about trying to reduce and contain the plant's 4.5 foot canopy width, the plant would show leaf wilting in the heat just an hour or two after a watering, so I'd give it another watering. I am taking a guess that this watering approach over time slowly over soaked the soil (in spite of there being an aeration chamber which I thought would allow the necessary air to be available for the roots).
Since then, the remnant is showing signs of struggling to survive, but full sun in the afternoon is probably beating on her a bit much. I don't have a shade set up for her and I don't really want to because if I can't secure it well then the wind is likely to blow it into the Mulanje Sherbert which I don't want negatively disturbed.
And also, the Mulanje HP showed a similar sudden collapse at the same time. I would think as both plants were treated the same, that their respective collapses were related/shared. So if the soil suddenly went toxic for both of them it seems to me a bit much to think that one pot came right by the end of the day and one didn't (but I say that as a non expert).
Thanks for your suggestion on flushing and the explanation of reseting the soil's electrical system.
@Gee64 How much money are you putting on that cat piss bet? Lol. Does @Stunger even have a cat? Or maybe one sneaks up over the balcony rail at night, in secret. After all, it's a stealth grow!
But honestly @Stunger, I don't know if the M ME plant would survive a flush. I would guess there is a lockout of some kind because the plant's reaction is systemic. It has the look of a soil and/or root issue.
Is it the same soil poor Mulanje had last year?
If she was mine I'd check the soil pH. Soil pH tends to go down over time, and since you don't often check it -- how many years has it been? -- it could have gotten quite acidic. Anyway, that would be a good place to start.
All the best and good luck!
Last year with the Mulanje, I gave her a 150L flush. It was the first flush I'd ever carried out so I was keen to do it just to have the experience (even though it was my first day of catching Covid too). However, after that flush the Mulanje appeared to collapse even quicker, altho I never gave CalMag afterwards.
I just reread your entries. Is that the plant you were bending heavily? If so, did you bend it last grow too? A snapped tap roots will do this too.
I did bend it heavily, my plastic coated garden wire is very strong and was easily able to contain the tension. I did the same last year. I would be surprised if the tap root had snapped as I was bending the branches not the whole plant. But the Mulanje ME on this grow did have at least 1 bad (pressure relieving) crack in a branch low down where the trunk meets the soil.
The observation of the collapse came just after the extra watering.
OK fair enough, I just assumed they were for cats.
Theres still something drastically wrong in there, and if he didn't snap a root, it looks like urine or a toxic bucket.
If it happened that quickly it had an exposure.
I can get the toxic bucket suggestion that if something toxic causing was added to it (and as well to the other plant that recovered fine), but I am totally unaware of what that could be or how that could have happened. So I don't think that could have happened other than the waterings.
She does appear to be coming back!- tbh, I gave her up for dead a few days ago...
It's great to hear that I was wrong..and there's still 3 balcony girls out there!
Going to be interesting to see how she handles flowering..
Thanks Carcass! The 2 healthy ones are looking good, and all going well between now and harvest they should provide more than I need. But also too, the sudden extra available space has made me realise that the balcony is really too small for 3 large canopied plants. I will revise my training approach for my next grow.
Thanks for swinging by, I hope your gardens are going smoother than mine! 
hope your ME pulls thru. CL
