Dying Leaves At the Bottom! HELP!

I started to flower my plants. i am using a 250w hps and i am using Open Sesame by fox farms 5-45-19. i also put mylar in the closet 2 1/2 foot by 3 foot.

i forgot to say that i have mylar on the floor in the closet, it about 3 by 4 feet and i got the light a couple feet away. i am in a week in flowering and the hairs are everywhere. but the leaves are started to drooped or die at the bottom. anything besides that its fine.

i am using Open Sesame by fox farms 5-45-19

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There's your problem. Way too much phosphorus in relation to nitrogen (1:9:4 NPK ratio) causing a nitrogen deficiency and other problems. The ratio should be more like 1:2:2. Get something closer to 5-10-10. You should flush immediately before you end up losing all your foliage, then add a 1:2:2 ratio nutrient @ 500 or 600 ppm.

ganja grower420 said:

i forgot to say that i have mylar on the floor in the closet, it about 3 by 4 feet and i got the light a couple feet away. i am in a week in flowering and the hairs are everywhere. but the leaves are started to drooped or die at the bottom. anything besides that its fine.

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Are they turning yellow and dying off? Just the lower fan leaves. If so I think it's fine, the same thing is happening to my plants. Check out my grow in my sig and see if your look the same as mine did. If new green growth is sprouting out of the nodes where the yellowing drooping dying leaves are then I think it's perfectly normal.

About 95% of experienced growers will tell you it is normal and natural for lower fan leaves to wilt, yellow and fall off after you are into the Flowering Cycle.

Many, well, 5%, are starting to use a very minute amount of extra Nitrogen, or VEG NUTES during Flowering and reducing the Phosperous slightly. Those lower leaves will stop dropping off then adn the entire plant will be healthier and grow faster.
Uncle Ben has a Sticky Thread about it here somewhere.