First Indoor CBD Auto Cheese

If you want tight internodes and keep her short and squat. Use the veg switch only. But if you want more vigorous growth with a little stretch I recommend using both switches. And if you pick option one you can keep veg switch on till week 3 of flower then turn both switches on. This will keep those internodes tight set you up with some nice dense bud.

@MediciGrade Dont lower your lights as the extra heat will only add to the stress of a nutrient toxicity. Do your plain water flush until the runoff ppm is back to wherever it was before you overfed.

Reduce the light and you will reduce your yield. LST and hst will amplify nothing , it will keep them shorter and will allow you to build a shape but will not reduce the way they are growing , a tall plant remains tall and a short plant remains short , you can manage the height and size but that's all. From seed you have different type of shape , smell and colours due to the multiples phenotypes available, you make your selection to keep a clone and maybe creating a clone only strain ( I am calling it a clone only phenotype , a strain is not a cutting )

I think this is down to the pH being slightly low, try to increase it to 6.5 and flush as budx says. It could be pests so check under the leaves very closely for any evidence... I hope its the first issue. 🌱😁