Yellowing leaves 5 1/2 weeks into flowering

Hey, I am now 5 and a half weeks into my ladies 8 1/2 week flowering cycle and i am finding a lot of the lower leaves on two of my plants are turning yellow and slowly dying, is this normal? Also is it a good idea to get rid of the dying leaves as i feel they could be draining the plants? thanks

No leave the leaves on the plant let them fall off naturally. And yes it is normal.