What is wrong with my 4 month old plant?? (Pics)

Ok so my plant which is about 6 feet tall including the 7 gallon pot it is in. This is my first grow and I have had only minor problems prior to this major one.

So a ton of the leaves decide to go yellow on me while I am still feeding them nutes!! I am currently feeding fox farm tiger bloom but since the leaves decided to go yellow on me I deicded to feed it some grow big for 3 days but it is still continuing to yellow!!
Here are some pics of my plant and it is about 3-4 weeks into flowering.

Well I'm sure it's root bound in that tiny container oh well it could be worse. have you checked the PH of your water? do you check you PH when you add nutes? it can lower you PH quickly and your roots are cramped probably a combo of both. still looks good lots of good info on checking PH in plant problems section up top in stick links

Looks to me like PH spotting.

Additionally, that pot is way too small for such a large plant.

GrowSpecialist said:

...for such a large plant.

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plant??? that is a tree. you need a pot the size of a cooler for that monster

desertrat said:

plant??? that is a tree. you need a pot the size of a cooler for that monster

Click to expand...

Indeed. Putting it in the ground might be the best course of action.

I have only recently started checking the ph on the water I feed and had to use to PH up to bring it up to 6.0-7.0.

And I am afraid I must admit I have fed ph level 4.0 and lower for about 10 days.

put that tree in the ground!

ya transplant it into something bigger. the leaves will start to do that as it flowers. your doing good just make sure u flush it for two weeks at the end and your gonna have some chronic

Thanks for the replies everyone. How badly damaged do you guys think it is since I fed with bad water for a few days??

Also should there be a problem if I dont transplant it into a bigger pot since I should be harvesting soon??

god damn its christmas already. look at that tree!!

the water thing will be fine as long as u flush it with good water. i would transplant it but its up to u

Take it out of the pot flush the roots good with room temp water. Dig a decent hole in your garden about 3 times bigger than the pot its in currently.. Then mix up some perlite with good potting compost and fill round the roots... I would suggest to use plain water every 3 days maybe some hydrogen peroxide h2o2 mixed 30mil to a gallon
which will help the plant clear any excessive nutrients.
Hope this helped

OR Move into a bigger pot... im no expert but i think this is a classic case of over nuterienting your Tree.. it should be safe to move at this stage just make sure somone is there to help you, so your not as rough with the tree while re potting