Need some help about solar burn

hi! it seems like magnesium deficiency. it can occur during the phase active growth, usually after the 20th day. what is your profile of feeding?

I don't think it's light burn. Definitely heavy on Nitrogen as they are really dark green. The lighter yellow is showing a toxicity. Check runoff ppms. If 300ppm over what your input ppms are then you have a build up. Check you PH that definitely could be a issue. I say it's over Watered, reason is the leathery looking leaves. Over feed, the dark green shows Nitrogen toxicity and yellow shows it's turning to lockout. Regarding LST I would let it stretch more before doing anymore. Granted it all depends in how much vertical room you have available above the plant. I would back off the light to let it stretch and then carefully pull each top slightly over to allow others to catch up. Once 4 - 6 mail colas show, stop lst and let them grow vertically. Please check out my Jammy Dodgers #2 diary. He looked identical to yours. I just harvested and yielded 4oz off him dry. He was my smallest plant. Good luck and please select me as the answer so I can be entered for a chance to win grower of the month contest I would really appreciate your support growmie. 🙏 😃

If your plants have experienced light burn, you can take the following steps to help them recover: Adjust Light Distance: Increase the distance between the lamps and the plants to prevent further damage. Aim for an optimal distance based on the light requirements of your plants. Trim Damaged Leaves: Carefully trim the burnt or damaged leaves using clean, sharp scissors. This allows the plant to redirect energy to healthier growth. Check Light Intensity: Ensure that the total light intensity is appropriate for the stage of plant growth. Sometimes, a lower wattage or adjusting the light intensity can prevent further stress. Monitor Temperature: Check and regulate the temperature around your plants. High temperatures can exacerbate stress, especially with intense light. Provide Adequate Watering: Ensure proper watering. Sometimes, burnt leaves are a result of water stress. Maintain a consistent watering schedule, but avoid overwatering. Consider Nutrient Levels: Assess the nutrient levels in the soil. If your plants were stressed, they might benefit from a balanced, diluted nutrient solution. Patience: Give your plants time to recover. Healthy new growth should emerge over time. Remember, each plant species may respond differently, so observe your plants closely and make adjustments accordingly Lst looks good from what i can see, good job & have fun growing buddy🍀

i assume you inched it further away? trial and error to find best height -- your area of coverage usually dictates optimal distance from canopy. you don't want a huge difference from central area to edges/corners, but some drop off in intensity is inevitable around perimeter. any severe damage will not heal. if yellow, it might recover. However, do not remove those leaves. there is plenty of live green surface area reacting to light (photosynthesis). they are still useful if the plant doesn't want them, it will suck them down and shed them. when/if they easily pull off with no effort, that is an okay time to remove. if the ends do die off.. of OCD about it you can cut off the necrotic parts, but don't cut into live portion of leaf. removing the dead spots may even have some benefit as far as avoiding pathogens.. same as keeping a clean garden.. you should remove dead foliage on ground for same reason.

Its more nute burn or/and ph issue, those rusty sots or calcium lack or sign of wrong ph. Plus you heavily overfed with Nitrogen, slow down on food a bit. Damaged leaves never recover, your target ir prevention in emergencies, not esthetics.