Unsure what is causing this and what is the best solution...any ideas?

This is a big devil xl auto in week seven. It is in Hyponex soil. I have been feeding fox farm nutrients. Last week I fed - 3tsp big bloom, 1tsp grow big, 2tsp tiger bloom, 1tsp cal/mag. It started to show up, originally, on 2 large fan leaves attached to the main cola. I was rotating the pot 180degrees every day, so thought maybe it was some kind of wind burn because it was only on the two leaves that were directly in front of the fan, which was possibly closer than it should actually be, but anyway. Well, it started to show up on several more leaves throughout this last week. So, im now torn between it being a phosphorus deficiency or something caused by ph. Before I fed this morning, I did a ph test of the soil and it showed to be somewhere between 6.4 and 6.8 (going by a color chart) I then fed it a very light dose of nutes (1tsp big bloom, 1/2tsp grow big, 1/2tsp tiger bloom, 1/2tsp cal/mag) The water was ph'd at 6.5. I was attempting a small flush, I suppose. Anyway, I decided to go that route rather than giving a heavy dose of bloom nutes and burning my plant up this close to finishing. Any suggestions on what is going on or what I should try would be appreciated, otherwise im gonna just ride it out till my next watering and pour the coals to it with the Tiger Bloom.

Looks to be alMost done to me? It's an auto as well so your all done I'm guessing bud. Have you looked at your trichs under a scope?

Probably phosphorus being given up from the leaves to finish flowering. Totally natural.

I looked about a week or so ago and the didn't look even close. Guess I better get in there and take a quick peak. i cut my last auto a good bit too soon and i feel it really affected my results so i was gonna let this one go as long as possible....may be time though. Thx!!

How many weeks in flower and what strain?

Its been flowering a month and a week or so. Big Devil XL is the strain.

Do you know about how many weeks that strain takes?

I think, like, 63 days, seed to flower. It's probably got 3 or so weeks left.

Olive Drab Green said:

I think, like, 63 days, seed to flower. It's probably got 3 or so weeks left.

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yes, i believe 63 days is about what the strain data gave. Im pretty sure im gonna let it go at least that much longer. the only thing is that these leaves seem to be going kinda fast for me to have that much time left.