Yellow/Brown Leaves ; Late Flower Stage

Hey all,

For the past few days I've been noticing my plant has been showing multiple yellowing/brown, some drying, and curling of the leaves

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I panicked so I trimmed the leaves assuming since they were dying off already.

For the last two days I've noticed the following yellow/brown in the lips of the leaves.

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In regards to temp, it's around 77-78F, humidity is around 34%. I have not been giving nutrients, but water.

Are these yellowings due to lack of nutrients? Or possible hear stress? The buds do not look like there effects, but noticing it's loosing a lot of its crystals.

Any feedback will be much appreciated!

Cheers,
Mikey
 
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