Eagle Claws and Canoes

So..... 4 days ago, this started to happen. I believe it was due to over watering and i let it dry out. I watered last night when the pot, soil and plant felt very light, and now it seems to be getting worse. I only use molasses and banana peel tea once every two weeks. She is in soil, and is in week 5 of flower today.
Any advice would be welcomed.
Cal/Mag?
or Transplant?

major heat/moisture stress goin on up in there

just looks stressed maybe needs a little nitrogen those leaves are pale green.

Temp is high i know. 85F with 50% humidity. I thought it was something else bc its the only 1 out of 3 having a problem. it is also the only sativa dominate strain..

its also dropping leaves on me.
started at the bottom. green to yellow then they break off easily with the slightest pressure

Thankyou HogBud & Big Texan

they need nutrients pretty bad. 85 with 50% is alright just think of the rain forests about the same temps. but im almost positive those plants are hungry since they are beginning to bud they are taking in more energy and it seems like shes eating herself to stay alive.

Looks like they're trying to climb outta the pot it's in... temp/humidity seem pretty good from what you say... I'm outdoor doin g with an even higher humidity than that...

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Feed it! Needs N,P,K!

How big is the plant and the pot?

The plant in question is 20" tall. The pot I am using is 8" Tapered, that is 7" tall.
Some pics from a few days before the problems.

I mixed up a molasses water mixture, and fed my plants today.
I hope she turns around. I'm starting to get concerned about her being root-bound.
I guesstimated the pots to be 1.5 Gallons

Yeah, after doing the math, it is around 1.5 gal, and that may be pushing the limits on required space. But I don't think that's your prob, yet. Appears to me you you need to up your N in your feed mix. Those pics there tell a better story than the first.
Just my opinion.
I use 1.5 gal square pots- 7x7, and use clones on a 12/12 from the time they're transplanted, going approx 64 days to finish. When I pull the rootball from the pot- it's pretty obvious they would soon be rootbound.
If you're vegging any time at all, I'd rethink and go with a 3 gal.
Again, just my opinion.
Good luck!

Thankyou Spliffer1
Thankyou Dr. Who--- Love the show!

Agreed. Bigger pot. More food. Check heat at top with the back of your hand ten seconds.

Installed another intake and exhaust fan. (CPU)
Temps at 82 now.
Hmm, now the question is. What to do about my N deficiency, when I have no Fert...

go buy some straight nitrogen 5-0-0 and start adding 1.5oz to 2oz of N per 5 gallons or 2ml per liter.

Thanks BigTexan

Even some Miracle Grow wouldn't hurt. And how do u feel about some floros throwing some more light in the bottom third of the plants canopy?