Help me please think my plant dieing, first grow (outdoors)

Hey all, this is my first post here, but I really need some questions answering.
Awhile back I got a weedy seed and decided to plant it and see if it grew, and to my supprise it did.
It was going really great in the greenhouse and looked very healthy, then I moved it outside and its been left out there for sometime now, it was fine also.
Recently things been going down hill in a big way it seems, just as I was getting excited about it, its started to go yellow on some leafs and droopy as fuck.
Infact its got worse today alone since this morning, I have made some mistakes with it and not been using nutes or anything untill a couple of days ago.
I put some fert on it I found but did not read the instructions, they say 1/4 capfull with 1 litre of water, I used over half a capfull with half a litre of water about maybe less, omfg.
The NPK on the fert I used is 7-3-6.
Have I killed my plant? Its been re-potted and flushed with water yesterday and rained last night also.
It looks alot worse now then it does in them pics and its only been a few
hours.

http://img516.imageshack.us/my.php?image=phto0010dr9.jpg

http://img529.imageshack.us/my.php?image=phto0012gd5.jpg

http://img77.imageshack.us/my.php?image=phto0012zs1.jpg

http://img77.imageshack.us/my.php?image=phto0013ah2.jpg

http://img59.imageshack.us/my.php?image=phto0014ao5.jpg

http://img46.imageshack.us/my.php?image=phto0015lb5.jpg

http://img488.imageshack.us/my.php?image=phto0016xi4.jpg

It was very dry in the pot for a couple of days then I watered and later added fert like I said.
I been told about lack of N and also overwatering, I just don't know what to do, sorry the pics are so shit in focus.
Oh and I planted around April/May time.

 

it looks like your plant needs more water. no nutes for about three days. it looks like the heat is getting to it. kind of like it is too humid for the plant. i dont know for sure. have you sprayed any water directly on the leaves?

 

Just water for a while not to much and see what it looks like after it has got over the stress of repotting. Check the ph of your soil with a testing kit.You can get one from your garden centre. It should be around 6.5.

 

espsom salts 5 to 10 grams per plant, wash in heavily. stop watering so much....

 

No, man that looks like over watering. Let it dry out.

 

O, yea, it's common for lower fan leaves to turn yellow and die as you rplant gets older, don't freak out unless it gets really bad.