Question about nutes???

My plant is flowering now for 20 days, The soil is MG time realeasing nutes for 3 months or something like that. I have been testing my soils nitrogen level and it remains high, shoul I add nutes anyway or leave it alone?
I have never flushed out the plant, should I do that or what?
Thanx for any helpfull advice or tips.

Its best to give a flowering plant a flowering nute. It will need more phosphorus than Nitrogen and Potassium. I suggest getting it into some new soil that comes without nutes in it. After you do that, give it Miracle Grow Bloom Booster or some other flowering nute.

I have some of that blue miracle grow powder you mix with water but it is mostly nitrogen, I dont want to fuck up my nitrogen level. Is there any nutes I can add for Phosphorus without nitrogen?

u want sum pk 13-14 m8. feed it ya plants 4-6-8 week into flowering then flush 2 week b4 harvest. i got sum but you cant av it lol. anyway its really cheap to buy from a growstore or off the net. about 8-15 quid