Is this a problem

[Ty Greenthumb]

This is a 30 day old Cheese Auto from Canuck Seeds. Been away for work for 4 days and I noticed this going on on only one leaf. Being that it’s a mature leaf I’m not sure if it’s an issue. Also I’m noticing what seems to be darkening on the tips of some leaves. Any advice?

 

[AutoWonders]

It looks fine right now. If the plant turns dark green, that would indicate too much nitrogen.

 

[St. Tom]

looks great to me pal