Jackherer grow 2weeks in flowering,need help plz on 1st grow

Hi guys,my first grow and its jackherer and ive got a problem and need some v.good advise, my leafes are starting to yellow and was thinking is this normal? And the plant size is 17.5 inch which i thought jack was a tall plant but i did lst it, Im growing with
Biobiz light mix soil in 15 ltr
Veg for 6 weeks and in 2 weeks flowering
400hps
1.2x90 grow tent
4inch inlet
7" iscolating fan
6inch outlet with carbon filter
Ph 6.3-6.7
Humidity 40_60
Temp light on-24-27 oc
Light off- lowest 16.7 oc
Nutrients=house and garden soil a and b
Addatives=house and garden bud xl but starting from next feed.thank

Could be to much fertilizer or the fertilizer you're using doesn't have a correct level.

Good point, i'll cut my nutes by half on next feed but do you think i should flush before or wait till nxt watering and flush or just feed with half nutes?do you think she will be ok with looking at it? thanx flgrower!

420 magazine pic ....? why ask here then ...?

See you problem as ...Standard nute burn, with a little over watering on the side,....Flush with 3 times the volume of the pot, with air temperate Ph neutral water, allow to recover in dim light, one day or overnight......avoid feeding for 2 weeks then resume at half the current rate only resume, when you see a positive improvement