yellow leaves

Please help it is my first time growing and my leaves are turning yellow. I am getting worried now as its not just the lower leaves as well.

i just had the same problem but give more info

need to see pic have you fed them yet?

Probly needs some N there, man... That'd be my guess with no pics... Id say it hasnt been fed and is crying out for sum Nitrogen... Try sum black strap molassas mixed with water, and some worm castings, in a tea...

Need more info... If you are well into flowering and your leaves are turning yellow a week or two before you take them down that is completely normal and would not be worried. If you just started flowering or are still in veging than you need to add some nuts.

Use General Hydroponics (Even if you are growing in soil) concentrated grow formula. a 4 liter bottles costs about 60 bucks and it lasts me for 3 months or so with 60 plants in veg at any one time...

Hope this helps.

pics would rock