Big leaves turning yellow on 1st week of flip

[District 9]

My grow is on week 1 of flip but I see a couple plants the older leaves are yellowing at the edges and dying can anyone shed some help on this
many 🙏🏻

 

[District 9]

No Title

 

[fozzy]

Looks like maybe a little nute burn. What nutes are you using and how much?

 

[St.buds]

I agree looks like a lil nute burn maby cut back a Little

 

[District 9]

Hi I'm using Canna coco