problem with a lot of yellow leaves please sos!

hey this is my first grow indoor , and i have some problem , this is an auto flower day 52
i used soil and fertilized with biobizz, and i don't have a pH/EC checker ,
she was until day 40 with 3 cfls 65w
and i have led 240w
the temperature is 30c most of the time.

there something i can do to this better in that conditions?

Some one?

What exact biobizz fertilizer are you using?

It looks fine. Autos fade out and loose leaves at the end. Also that looks to be a small pot, possible root bound. I don't see anything major to worry about.

Autos need to be rootbound any transplanting will slow them down and you only have so many weeks for it to flower. Yellowing at the end of flowering is normal but it looks like you have a few weeks to go so maybe step up the feeding a little for a week.

Hey thank you for your help
I used bio grow 1-2 ml
Bio bloom 2 ml
Top max 1 ml
Shuld i use more?
That is not fertilizer burn or high ph?

like some mentioned above things that cause yellowing Ph isssues , over watering , insects , and in your case Nitrogen DEF although Nitrogen is used less in bloom stage its still needed

some things to remember for next time when changing from veg nutes to bloom nutes do it slowly over 2 - 3 week span as plant is transforming to bloom stage give plants a little boost of N middle of flower and even at the end just that extra charge does wonders
No many growers tend to think that its normal for MJ plants to yellow off as it reaches the end
in many cases its not true
Goal is fighting to keep that plant green as possible

also here i something you should right down if deficiencies occur on leafs on lower part of the plant its a macro nutrient issue
if you notice deficiency in upper part of the plant its a micro issue

So looking at your plant its a macro issue N most likely so add little more N in next feeding
go out and buy some blood meal at any hardware store walmart, lowes , rona , homedepot add 2 teaspoons per 2 liters of water mix well and let the plants have it