Outdoor plant issue. Please help!!!

[SkilledGrower]

I have an outdoor plant that is having issues. Not sure what the deficiency is.

The leaves are turning a yellow. Seems like it might have some sun burn also. The tips of the leaves are curing and are brown.
I also noticed that some of the tips on some pistols on the main colas look like they have sun burn also. But not sure if its just sun burn.
The plant has been outdoors for about month and has been in flower since then.

Here are a few pictures to help out with.

Thanks in advance for the help!

 

[SkilledGrower]

Another one

 

[bergerbuddy]

Looks like a minor nute def... Try giving it a few ferts... I see its growing in hydrotron... its not that bad really looks like a bit low in nitro actually.... I see the plants are budding... So I wouldn't add a bunch of nitro.. I'd just give em some good bud fert at mid rang of reccomended dose

What fert are u using.. how often etc?

Nice plants btw!!

 

[dkmonk]

I highly doubt it has anything to do w/ the sun, it looks like you need a good does of nutrients, especially nitrogen, add some cal/mag too.

 

[SkilledGrower]

Thanks for the quick responses.

Im acually growing in soil, but had some hydroton laying around that i put on the top so it wouldnt break up the soil when watered.

As for nutes, i havent used anything on them yet.

Im going to start throwing some nitro and cal/mag.