Foul smell from a plant?

I'm wondering what the cause of the foul smell, is it possible that it's root rot and the plants not showing any signs of problems?

During a warm spell about 3 weeks ago I noticed a foul smell in my veg tent and tracked it to one pot in which the plant looked just fine?

I popped it out of the pot expecting mush, slime or similar but no the roots still had strength to them and there's no slime or mush...
(i was bottom feeding at the time)

So I emptied the saucer, let the pot dry back a little then started feeding from the top and adding 1ml/1ltr 17.5% H202 for 4-5 days and everything was good.

Then yesterday when I was removing the run off i noticed that smell again, again, the plant looks just fine?

So my plan now is to trim the roots back then give what's left a soak in H202 solution then repot with some fresh coco... Or maybe a coco and perlite mix, there's not a whole lot of transpiration going on so they'd probably benefit from a more airy medium.

My main concern is root rot and losing the plant, what's causing the smell?

You've done the right things, I'm betting there is root rot somewhere in there if you can smell it from a distance. You could definitely take it out and trim the roots and repot it. I will do that sometimes just to slow down growth in certain situations, but the plants rebound from it in a week or so. You could try treating it with h202, then inoculate it the next day with something like Southern Ag GFF. Good luck! Let us know if you find the source.

Rurumo said:

You've done the right things, I'm betting there is root rot somewhere in there if you can smell it from a distance. You could definitely take it out and trim the roots and repot it. I will do that sometimes just to slow down growth in certain situations, but the plants rebound from it in a week or so. You could try treating it with h202, then inoculate it the next day with something like Southern Ag GFF. Good luck! Let us know if you find the source.

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I am not in need of pruning the roots yet, but my last grow I probably could have done some root pruning.
How do you go about that.

Rurumo said:

You've done the right things, I'm betting there is root rot somewhere in there if you can smell it from a distance. You could definitely take it out and trim the roots and repot it. I will do that sometimes just to slow down growth in certain situations, but the plants rebound from it in a week or so. You could try treating it with h202, then inoculate it the next day with something like Southern Ag GFF. Good luck! Let us know if you find the source.

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I think i know the likely cause?
That plant and a few others have been kept in 5" pots since February (11th iirc) growing and getting trimmed back repeatedly, only one has ever had the roots trimmed and that was only because i was downsizing from an air pot.

I think the roots have gotten too dense in the pot, that coupled with submerged roots in the saucer plus low transpiration rates through trimming and defoliating?

I've just had the realization that I should've seen this coming all the ingredients are there for it, that's something I'll need to consider in future for long term plants, lesson learned

gr865 said:

I am not in need of pruning the roots yet, but my last grow I probably could have done some root pruning.
How do you go about that.
View attachment 5191013

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I would only root trim mother plants.