Help! Yellowing leaves dying all over

So I come home today and my plants Largest 2 Fan leaves are completely yellow and drooping, the leaves toughing the buds on the top of my main cola are also beginning to turn yellow, what deficiency is this? Please help have only 48hours to correct b4 i'm gone for a week.

Here's 2 picks of 2 of the leaves, She is completely outdoor at this point sitting in one spot in a 5 gallon pot, She's about 4 weeks into flowering and my feeding schedule is 2 - 3 waterings per week 1 of which contains 1 dose of full strength Fox farms Big bloom organic plant food in a 1 gallon jug, roughly 4 Tbs The other 2 times i water with a Garden hose until completely saturated.

My thought is, perhaps the garden hose has something to do with it, we have a lot of minerals in our water here because we get our supply of water from an underground natural made Resevoir.

Please help!!


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