Veg nutes first 2 weeks of flower?

Hi guys is this a good idea? Seen a lot of people recommending this as during the stretch phase of flower I assume the plants need more nitrogen

You'll need to provide a lot more info for anyone here to provide solid advice. What medium? What nutes? What ratios? People here will be split on whether nitrogen should be kept high through flower or it should be reduced to emphasize P and K. It's best to be consistent throughout the grow with nutes unless you really have the formula down for your grow and you're looking to maximize. Simplicity is key if you're still trying to dial in your setup. You can always tweak the recipe next grow.

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The directions on my nute bottle says use 50/50 veg nutes and flower nutes for the first 3 weeks.

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I keep on the veg cycle of nutrients until the of the second week of flower.