Having a nutrient issue (any ideas)

Thanks Joey I'm gonna have to rule out the iron because I've been giving it cyco dr. Repair every other feeding. I'm thinking its either a excess or iron or not enough nitrogen like tour all saying. Cheers

Looks like it can be the start of nitrogen/iron issues..

Lmaooo yah thats what I was thinking to an N deficency. I've never did a 3 month veg so I'm gonna say your both right this just helped me ease my mind cuz this is what I was thinking too. This is my first time in 15 years ever growing a plant for 3 months veg. I'm gonna hit the girl with a heavy feeding and next Monday throw her into flower. Cheers guys

It looks ok, but 3 months worth of veg is going to bed a lot of feeding, are you not wanting to flower soon? If so, don't worry, flip to flower and start feeding with bloom nutes

Your pro mix is probably out of N at this point so you're getting a deficiency, you'll have to add some to your feed when you water. It won't correct itself, so you'll have to take care of it.