not sure what the problem is but it does seem to be happening in the veg stage and once your lower branches are dead there really is no bringing them back so it looks like you may be flowering palm trees for awhile.
but would suggest you try some different things on a fresh rooted clone or seedling to see if you can correct the problem seeing how it affects the lower part of the plant it may be due to a p or k deficiency alot of your leaves seem small and not nearly as big as they should be and if your not regulary using big bloom in the veg state also you should start along with your fish emulsion you could also try different soil.
bejay Reviewed by bejay on . First Post Bottom of plants Dead? have pics OK do im using a 1000 watt hps for light using foxfarm big bloom 4 tablespoons per gall fish shit 5.1.1 for veg I dont know what im doing wrong my ph read's 6.9 Iwater when ever the plant fells light ever cupple days or so Some of my plants look like palm trees now this is one of my best ones so im tring to save it.Its NYSD around 7feet tall indoor So please will some one help me /cry Jbo Rating: 5