Lower leaves turning yellow

Hello guys
My plant is 4 weeks into flowering and i noticed that most leaves in lower part turned into yellow and start falling. I feed it tiger bloom 2-8-4 every other water since it started flowering. I am using cfl 45wattx4 and one 90 watt
Whats wrong with my plant ? What can i do to fix it ?
Thank you

Your N is pretty low but they look pretty dark green on top. I think you aer getting lockout but I don't know why.

overwatering

Savage Garden said:

overwatering

Click to expand...

Are you sure its overwatring i water it every 3-4 days
Should i stop watring for a week ?

70's natureboy said:

Your N is pretty low but they look pretty dark green on top. I think you aer getting lockout but I don't know why.

Click to expand...

Can N get low if i feed it regularly ?
It really looks like N def. how can i make sure

Roocky said:

Are you sure its overwatring i water it every 3-4 days
Should i stop watring for a week ?

Click to expand...

there is no regime for watering...it changes.

pick the pot up and get a feel for the weight when shes wet and dry