Rapid leaf yellowing in early flower stage

Hi guys,
Huge noob here. First time grower. My plants over the last couple of days have really rapidly started yellowing, and not just from the bottom but all over the plant. Except for the areas with the pistils growing from, the rest looks absolutely fucked, and it has only been in the last couple of days. I feed them with the bloom stuff about every 5-6 days, and my friend suggested doing a massive flush which I have not done for a long time. Could this be the underlying issue? Thanks

looks like N dif. promix, soil? what brand and ppm are you feeding at? you should have continued feeding grow formula for first 2-3 week after flip. what is your runoff ph, have you been testing ph with every feed? a good flush is probably the place to start.

Growdict said:

looks like N dif. promix, soil? what brand and ppm are you feeding at? you should have continued feeding grow formula for first 2-3 week after flip. what is your runoff ph, have you been testing ph with every feed? a good flush is probably the place to start.

Click to expand...

Oh shit, yeah I swapped to bloom formula straight away which was obviously stupid. Damn. Well should I flush them today and then feed them some grow formula after to get some nitrogen back in there? And yeah, been looking at some more stuff and it definitely looks like nitrogen deficiency. Thanks mate

ya, probably time for a flush anyways, if you have any salts building up, you can get rid of it. then maybe feed half grow half bloom for 2 feedings and see how it responds. dont forget to ph

Growdict said:

ya, probably time for a flush anyways, if you have any salts building up, you can get rid of it. then maybe feed half grow half bloom for 2 feedings and see how it responds. dont forget to ph

Click to expand...

Thanks champion. Now a feel a bit stupid for swapping too early. Too many leaves have yellowed. Anywho, because they desperately need nitrogen and half the plant is fucked, should I feel half grow half bloom now and then flush after that? Simply because they are starving for nitrogen?

no, flush first. approx same size as container, so 5 gal of soil = 5 gallon of water, then feed 1 gallon right after

Growdict said:

no, flush first. approx same size as container, so 5 gal of soil = 5 gallon of water, then feed 1 gallon right after

Click to expand...

Thanks so much mate. I will do it now!

you ignored my ph question, do you not have a meter? if you do not, you may be able to use some lime and epsom salt to stabilize ph

Growdict said:

you ignored my ph question, do you not have a meter? if you do not, you may be able to use some lime and epsom salt to stabilize ph

Click to expand...

Oh sorry, nah I dont have a meter. I'll give that a crack though!

ok, well read up on epsom salt and dolomite lime amendments to soil. you are almost certainly N diff and probably Cal/Mag diff because of your PH and also switching too soon.