30 days into flowering is pruning ok?

Ok, so I am a first time grower and have been having a lot of luck I have six beautiful plants of different varieties and all have very healthy colas and tops in general; however due to crowded conditions and a lack of rotation(my fault), the plants middle and bottom leafage is yellowing and a lot is dying off. There are six plants in a closet with a 1000W bulb. most are 4 ft tall from 30 days veg and I am 32 days deep in flowering.

I did not trim at all b/c I wanted to know how the plants would act.

however now I see that some of the lower branches probably wont produce anything of any real consequence I needed to know if it was too late to trim some of the smaller branches on the bottom that are small or just looking weak. I think this could open the air in the middle as well as concentrate nutrients to the bigger supre healthy buds on the tops of the plants.

if there are small buds should I keep them or just take off everything that is not going to make a few grams or more?

I know what I would have trimmed now but am wondering if it is too late to trim the small branches with benefits to the overall plant. Also I used advanced nutrients overdrive which is supposed to give me another 4-5 days of flowering also.

any help is much appreciated

let them die off on there own.

right on bro I was going all natural but space was too tight thanks

tie it down to better expose lower bud sites to light