What’s going on here?

[Wyodub]

Bruce Banner has been impressive to watch grow and it has given me virtually no problems. I’m on week 5 of flower. Growing in 30 gal of living soil. Canopy looks good. Underneath I’ve noticed a handful of the leaves looking like this though. Any idea what’s going on or if I should be too concerned?

 

[HerbalEdu]

nothing especially wrong or special with older and lower leaves slowly dying along flowering, especially indoor with low light penetration bottom of canopy.

 

[Imzzaudae]

Your plants look great. Just clean up everything below the canopy and I'm thinking you will be fine.
As these plants are so close to finished up I would not change a thing.
Check out this link for future reference. Open and save to your browser.

Cannabis Leaf Symptoms Quick Guide With Pics | DRCANNABIS.IO

Use cannabis leaf symptoms pictures to quickly diagnose your marijuana plants. Find the pictures that resemble your plants and learn how to fix the problem!

drcannabis.io

Look at Zinc and sulfur. Base minerals

 

[Grower1974]

They look perfect.