nute or heat burn? please help week 6 flower

Hi, i am on week 6 day 3 of flower and just the top colas are starting to have burned leaves. Idk what to do. Help!!

You will need to provide more details on your grow...medium, ph, temp, nutrients, light. They definitely look nute burnt!!

Medium- coco
Ph is fine
Temp is 85
And im using supernaturals brand nutes, just switched to super bloom Thursday
Should i flush? Or just lower my nute potency, iv been using full strangth. It seems like heat burn though because the problem is only at thr top parts of the plant

that is nutrient burn

So, what should i do then, only a few more weeks left. How much permanant damage have i done? How do i fix the issue?

def a nute burn bro. dont use what the label says its to much. you need to flush the plants then use half what the nutes call for. get you some liquid karma or sugar daddy and you should be fine . although the stress you have caused will affect your yeild.

notice how the leaf margins are folding. that tells me you got an excess of NA. because of the excess NA your plant is actually drawing the water out of it instead of soaking it up. you got alot of salt build up flush that out and you will see big change

easy way to tell if the heat from light is affecting your plant is to hold your hand over the top of your plant if the back of your hand gets to be uncomfortable after a minute then the lights to close

Flush, Flush and Flush.

Grab some FloraKleen so you can flush out and start with what they said above anywhere from 1/4 to half of what is recommended, you can build tolerance by topping off your resevoir with a concentrated amount once a day until eventually you build up to what your plants need. The guidelines on the bottle are just that, guidelines each strain responds differently to dosage. If you ever run into a lockout from low or too high you can use botonicare clearex and it will correct the problem from lockout. Are you using a TDS meter? if not, i greatly recommend using one! They work wonders on gauging the correct amount of nutrients and you wont have to "eyeball" it....the temp of the water, acidity, ph all determine ppm as it can vary drastically from temperature of your water!

When I looked at the pics again, you had leaf curl as well, signaling heat stress.

Can i just flush with water...

Not for heat stress. Check the heat at the top of your canopy with the inside of your forearm or back of hand, if it burns the skin or feels hot then move the light further away. It could be due to relative heat in the grow room but from the looks of your lower leaves in the second pic, the plants may just be too close to the light.. IMO