Blue dream plant problem. Leaves are turning yellow and some are dying on lower branches

Here are my specs.



SOIL GROW

Strain - Sativa Dominant Blue Dream


# of Plants - 2


Grow Type - Soil


Grow Stage - Vegetative, transitioning to outdoor right now.


Bucket Size - 3 Gallon


Lights - 400 Watt HPS with 330 w CFLs


Nutrients - Botanicare


Medium - Subcools Supersoil


PPM - unknown


PH - 7


RH - 40%


Room Temperature -68-74


Room Square Footage - 2'x4'


Pests - None Known


I water with chlorine free water at a ph of 6.5


A large number of leaves are turning yellow, plant is no bigger than it was a month ago, and leaves at the bottom branches have been dying without turning yellow at all, starting with the tips drying out.

About two months ago everything looked great, plants had been in the 3 gallon grow bags for around a month or more.

Now things aren't really moving, the dead leaves are replaced by new leaves but there is practically no increase in size as time goes on.

I have been feeding them a little Botanicare PBP Grow since putting them in soil, but they aren't really responding anymore, so I don't think it is a nitrogen problem.



I am somewhat new to growing, though my first time was nearly ten years ago, I don't really have that much experience, so any help would be much appreciated.

Do you gave a scope or microscope to look on the bottom of the leaves? It could be spider mites or russet mites.

I will try to find one and take some pictures.

Plants look like a phosphorus deficiency or overwatering.

Mmjdreaming, I checked with a magnifying glass and didn't see any mites.

Brandon, I have been careful. It to overwater them, so it could not possibly be that, however you might be right about the phosphorus. I have started some bone meal tea I will give them in the morning, and will keep you updated.