What causes leaves to do this ?? ( see pic)

Hello all
I’m using MBferts line and am 5 weeks into flower. Some of the leaves near the top of the plant have this crisp look. I’m using Bud A , Bud B ,late PK and vitamin hormone boost all from mbferts. Growing in soil.its promix cut with perlite and green and gold ... And I feed at PH 6.5. I am useing HLG QB132’s
Thanks for your time and input people ! Hope you are all doing well !

Promix is peat based, so it's possible your pH is too high. Soil-less mediums need water at a pH of around 6.0.

What's the rest of the plant look like? Pics? What about grow room temperature?

Might also be burn from all of the extra stuff you're adding.

Can you provide full plant pics; two leaves don't say much on their own?

Full plant pic would be helpful. But looks like nutrient burn big time.

Here are some pics

Yup Nutrient burn. Give them a thorough flush. Out of curiosity check the EC of the initial runoff. X

Merlin1147 said:

Yup Nutrient burn. Give them a thorough flush. Out of curiosity check the EC of the initial runoff. X

Click to expand...

Ok will do thank you. Can I use sledge hammer from foxfarm to flush???

spek9 said:

Promix is peat based, so it's possible your pH is too high. Soil-less mediums need water at a pH of around 6.0.

What's the rest of the plant look like? Pics? What about grow room temperature?

Might also be burn from all of the extra stuff you're adding.

Click to expand...

Doesn't peat lower ph? I thought it acifified soil mixes which is why you add lime to peat blends.

Looks like good old phosphorus burn to me.

Man I'm sorry. Those look dreadful. Don't bother flushing. You can't flush it out. Water normally for your remaining weeks and use no chemical fertilizers. The damage is done. Trich production will be influenced. How could it not right? You'll still get smokeable buds that's the good news.