(HELP) top leafs curling up and browning !

[Numb73]

Hey guys, i’m New here, i’m Growing 3 critical autos and one of them have a leaf problem that I can’t find what it is, i’m In week 3 of flower and the plant top leafs start curling up and the edges becomes brown with some brown spots, i’ve already flush 2 times but things continues going bad, I don’t know what to do.. please help me
Temps a 24/28 celsius
Humidity: 55/60%
Nutes: biobizz
Strain: critical +2.0

 

[420Forever]

hey there @Numb73 and to afn! i admit to bein not worth a damn at Rx for plantz, lol, but there are plenty of peepz here that are & i'm sure u'll get the help u need, so jus hang in there &

 

[Numb73]

Thanks, hope someone will help me, cause I really don’t know what to do

 

[420Forever]

Thanks, hope someone will help me, cause I really don’t know what to do

-> patience grasshopper, patience...

 

[Boognelson87]

How much bio bizz nutrients are you giving them? Are you feeding the soil microbes while giving bio bizz? Are those temperature readings at the top of the buds? I run bio bizz and I've read that phosphorus deficiency is common with it. Also, do you feed it cal/mag?

 

[bad dragon bzzz]

whats the ph of water ?
biobizz fairly weak so dont often burn.indoors under led...cal/mag is more or less a must.
good luck n keep er lit

 

[H8plow]

Are these inside or outside?

What is the ph? What is the ppm of your nutes, what is the ppm at runoff? Are you in soil or soilless? What light are you using if indoors? How far is the light from the canopy?

We need a lot more info in order to get you on the right track. That leaf issue can be from a lot of different issues.