As they are outside the only thing I can think of is are you sure something/wildlife hasn't peed on those two plants?
Because that sure doesn't look like any deficiencies that I have ever seen before.
What soil mix did you use?
Also have you fed them if so what and how much?
Sorry to hear this about your plants mate.
Edit:
After looking at the last pic again I would say they need a feed if you haven't fed them anything.
i feed them 2/3 strength miricle grow 1 time a week
Bingo, theres your answer right there mate. Miracle Gro is bad for cannabis plant's and acts like a weed killer.
It is the wrong ballance of nutes and locks out other nutes and causes the problems you are having when fed to cannabis plant's.
If i was you mate i would flush the plants with plain water 4 times the amount of water you normally use and then see if they start to come back. If they do then you can start off with a feed like Bio Bizz ect at half strength.
marijuana forumsthat is bull shit I've used miracle grow for years and never had any problems where do you come up with this stuff
marijuana forums
that is bull shit I've used miracle grow for years and never had any problems where do you come up with this stuff