Flowering

I'm starting my plants on 12/12 very soon but am not sure what to do when the flowers start any help with pictures or good explanations wuld b great

Just let them grow and change nute to 5-20-10 or something like that. Do not interupt their dark period never as flowering plants must have 12 hrs of uninterupted dark!

sorry its my first grow and i have no idea what 5-20-10 means

5-20-10 is what the fertilizer has in it. When you are in the store looking at ferts the bottle will have theese numbers on it find one close to the number above and start with a 1/3 mix that the bottle calls for increasing the mix untill you are at 100% strenth or higher as you gain more expeirence growing!