What problem on my plants?

High BurningTreezz, This is a potassium dificiency in the late stage. The cause of this dificiency could be pH issues or overfeeding. You can measure the pH from your soil to make sure that this is not the cause. I will explain how to do this. And if the pH is in the right range then you need to flush your soil so you can start giving the right amount of nutrients again after the flushing. I will explain you how to flush the soil after I explained you how to measure pH in soil. To measure pH in soil, just follow these steps. Your pH should be around 6.2. 1. Place soil sample about ¾ full in sample jar and add distilled water to cover soil. 2. Cap the jar and shake the soil vigorously a few times. 3. Let mixture stand 10 minutes to dissolve the salts in the soil. 4. Place the pH tester into the wet soil slurry. 5. Measure pH and record measurement. If the pH is in the right range then flush out the nutrients with a good flush of your soil. For this flush just follow these steps: You can do this flushing by slowly pour water pH 6.2 onto the top of the soil, allowing it to drain freely from the bottom of the pot. Pour slowly, so the water doesn't overflow from the top of the pot. Use approximately four times the pot's volume in water to flush the soil. For example, use 1 gallon of water for a 1 quart pot. After the flushing you need to let the soil (almost) dry out completely. From there you can start giving water with pH 6.2 and nutrients but do not exceed EC 1.5 to make sure that you don't overfeed them. Happy Growing! 😋

Potassium or Magnesium https://www.growweedeasy.com/cannabis-symptoms-pictures

Check your pH and make sure it is between 5.8-6.8. This is the range where most nutrients can be taken in by the plants. If your water and soil are in the proper ranges, it isn't a pH problem. Which means it is a potassium problem. Buy some langbeinite and give your plants the recommended dose. They'll be good to go in no time. I hope this helps.

Yep, potassium deficiency. A dose or two of a P/K booster should solve this for you.

Put up a diary so we can see what the problem might be... it's looking, to me, like you have a potassium deficiency.... but a diary would help us to pinpoint the problem and help you solve it. Good luck!