SOIL Could It be lack of P/K?

[Indoor55]

Somebody knows what this yellowing/bronze tips could be? Its an autoflower, day 20, things going pretty good except for this problem. I moved Up the light but still going on newer leaves. I only feed her teas, hummus, compost and so. Thanks!

 

[Catfish22]

I see that on my autos, it seems to be normal. If you check those leaves after they fully spread out it will be cleared up. I think it may be because they really go into a spurt about week 3 when the roots have become well established.

 

[Indoor55]

I have seen It disappear also in previous autos so im not much worried. I think i am going to spray some delta 9(2-5-5 +some micronutes ) so i make sure there isn't any defficiency going on. Thanks for your help!

 

[azorahai]

Looks like light bleaching to me. Try raising your lights a bit further and see if that helps.