red leaves yellow leaves WTF!? Help, please.

Strain is SAGE N Sour
4 1/2 weeks flowering
50/45/5 coco soil perlite
I don't know the veg nutes (this plant was adopted)
I am feeding roots organic Buddha bloom and neptunes harvest fish and seaweed fertilizer
Day time temps-70*-80* Night time temps-65*-50*(maybe to cold?)
Under a 400w hps and a little t5 with lots of airflow and ventilation
I flushed two days ago thinking it was nute locked- final flush ph at 6.1

So what's going wrong here? I have 2 plants under my belt so needless to say this is a new and very scary issue.

If I am stupid let me know

As long as they ain't drooping I'd personally leave it but idk because I'm about 3 weeks into veg and one of my plants is getting yellow(ish) leaves but I don't really give a shit

needs potassium

i don't understand your choice of medium. coco/hydro, soil/not hydro, lol... i wonder what ph you should use. they look like they're yellowing off, as in end of flower. you're almost to the point where a pk booster should be used. flushing will mean you're medium has little nutes left in it, so they prob. are needing some nutes. not a good idea to flush coco, till the end...

As far as medium is concerned- I understand that it was a bad decision to mix the two mediums in such a ratio- it was a hasty decision lol too late to transplant for fear of stressing the girl.

I guess i will try some beastie bloomz i have in my closet?

So the general thought is to ramp back into feeding normally? Did i under-feed?

You have a severe Magnesium deficiency going on.
Pic of M def.

This happens every fall

How you ever used those nutes before? Sound like additives lol

I have used these nutes with tremendous success before. That's why its intimidating

I have never used the Beastie Bloomz.

Topfuel--I will add epsom salts to the regimen. Thanks

*like* your post

the red is from the low night temps. it actually makes it harder for the plant to take in Phosphorus.

Really- that's interesting

blowingupjake said:

Topfuel--I will add epsom salts to the regimen. Thanks

*like* your post

Click to expand...

Right on Man,
If you don't have alot of time left for them to flower you might just let it ride for this grow.
Keep an eye out for this next time.
Your Buds Look Beautiful, You'll Finish No problem with nice Buds, Good Job Man,

topfuel29 said:

Right on Man,
If you don't have alot of time left for them to flower you might just let it ride for this grow.
Keep an eye out for this next time.
Your Buds Look Beautiful, You'll Finish No problem with nice Buds, Good Job Man,

Click to expand...

Thanks a lot. I can't wait to smoke the cured product. The plant has an awesome very unique smell. I picked up the salt today so I will start using it Friday, i have until April 1 at my current home/ grow space so there is no rush