to much yellow?

I have a plant outdoors been budding for almost 3 weeks leaves are staring to turn yellowish is that normmal?

Probably a nitrogen deficiency. You should feed with a nitrogen heavy supplement 2 weeks into flower to prevent it in the future.

Could I hit it with nitrogen to straighten out?

Hmm,,,,GOD CAN SEE EVERYTHING!!!!!

Sadly I need a picture and some more info...
Turning yellow where, top down, bottom up, in the middle?
What Nutrients, how often, how much?
In the ground, in a pot, what soil?

I'll go long and pay the vig if it's not P&K toxicity (giving 1 "REP" to GOD). That's the #1 problem I find around here. No amount of added N will fix that at any point!

awaiting further info!

ffof soil been using fox farm beastie blooms and low dose of tigerbloom

Give her some blood meal it has soluble nitrogen that will be readily available to the plant.

DING , , DING , , DING ..... GIVE THAT MAN A CIGAR!!!!!

P&K toxicity it is!!!!

Beastie bloomz is what? 0-50-30 ?

Wash - dry to watering point and use a balanced flowering formulation! Beastie Bloomz is WAY to high in P&K for the point your at now...It should only be used at the LAST 2 weeks of flower before wash and harvest. And then - sparingly! High P&K supplements will "fool" the plant into thinking it's at the end of it's life cycle and it will stop uptake of N and take it from the N "stored" in the plant. In a sense it's eating it's self....
High P&K supplement's can add bud size and at least will "harden" or make the buds more "dense". They NEVER require them and should be used with prudence.

Good Luck...

P.S. Looks like I stole another soul from GOD,,,,no rep for you! LOL