Flowering Death at 5 weeks - Need expert advice

So I have 3 plants - One Top 44, and 2 unknowns. The Top 44 and one of the unknowns are doing great, very happy.

The 3rd has been having major issues for the last 3 weeks. Brown spots, yellow leaves, slow growth. At first I thought nute burn, then I thought pH lock, then I thought fungus because of high humidity.

The pH has been 6.5-6.8, the nutes have been light every other watering, temps around 70-75F. Humidity was high for a while around 70-75% but now around 60%.

The only thing making me think is is fungus, is that some of the budlets have brown/red hairs and the pistil they are coming from have also turned brown/red. See pic with circles.

Any ideas? A few more days and this plant will be dead - and its like 3 weeks from harvesting...

It really looks like your plants are/were re-vegging to me. You have any light leaks?

Honestly, the chances for light leak are very low. They are in a closed grow box, in a closet with lights off, and box covered in a dark sheet. there might be slight glow from under the door entering the room, but not enough to get through additional barriers.

GrowSpecialist said:

It really looks like your plants are/were re-vegging to me. You have any light leaks?

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what are the indicators for re-veg?

smoothdemon said:

what are the indicators for re-veg?

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-One finger leaves
-Halted growth/flower production
-Flower death
-Yellowing of leaves due to re-veg stress

the only weird thing is the other 2 plants are having a good time, all of them are side by side.

Are you in soil or dro?
If your in soil take a spoonful of soil out and put a little water in that spoon and watch closely.You might see little fungus gnat larvae if you do you need to get some gnatrol in there.They are tiny so look good!If your in dro you need to check your medium out with a magnification glass.

metric007 said:

Are you in soil or dro?
If your in soil take a spoonful of soil out and put a little water in that spoon and watch closely.You might see little fungus gnat larvae if you do you need to get some gnatrol in there.They are tiny so look good!If your in dro you need to check your medium out with a magnification glass.

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problem solvedwith hydrogen peroxide/teatree oil

i dont think its bugs, it looks like a contamination of the soil you might want to try leaching the shit out of it, remove it now before it fucks up the rest, if its in dirt stick it in the tub and rinse with tepid water the hot water part of it carries calcium deposits more so than plain cold thus replacing some of what you lose. since its budding you shouldnt have to worry about the shock too bad right now, trim the dead leaves and if it gets better in a week, send her back home, but quarentine her now.

growforfreedom1 said:

i dont think its bugs, it looks like a contamination of the soil you might want to try leaching the shit out of it, remove it now before it fucks up the rest, if its in dirt stick it in the tub and rinse with tepid water the hot water part of it carries calcium deposits more so than plain cold thus replacing some of what you lose. since its budding you shouldnt have to worry about the shock too bad right now, trim the dead leaves and if it gets better in a week, send her back home, but quarentine her now.

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yeah no bugs - hey growforfreedom, what do you mean by contaminated soil?