Should I defoliate?

Your plant is showing the detrimental effects of growing with a totally un-natural 24/0 light schedule, or,- weeks and/or months without any "sleep". Nothing on planet Earth can survive or function properly without a "sleep" period every 24 hours and this is why 18/6 is the recommended lighting schedule. Plants, including cannabis, do need "sleep" for a properly functioning metabolism. There are certain metabolic processes a plant must undertake for a correctly functioning metabolism that can not be done when actively growing in light and this is why they NEED "sleep". It is called a "circadian rhythm" whereby all living things have a cycle of activity followed by sleep, every day. The 6 hours of "sleep" can be thought of as 2 hours to recover from the day, 2 hours to rest and 2 hours to get ready for the day ahead, and this is basically what occurs during the 6 hours of "sleep". Changing your light cycle to 18/6 should return some health to your plant and you might still be able to harvest some decent flowers. Going to 18/6 will not harm your plant, just the opposite, it should give you a much healthier plant once it recovers and finally has a proper circadian rhythm of awake/sleep/awake/sleep/awake/sleep. I would not stress this plant any further by defoliating, she needs those leaves for energy production, and she will need a lot of energy to get back to a normal metabolism. Those "potential bud sites" are relying on the leaves to make the energy they need to grow, so removing them would be pointless. Personally, I wish people would stop claiming that growing autos at 24/0 is ok, as it just is not. If you are keen to expand your knowledge, google "photosynthesis" and you will soon discover why a night/dark/sleep period is essential for proper plant function. I would encourage you to grow your next plants at 18/6 and not 24/0 and I guarantee that those plants will have almost no problems, if any, in comparison to these plants. Unfortunately these plants are over tired and need some "sleep" urgently. I would be giving them just plain water for their first week of 18/6, before resuming your current feeding and care schedule. Hope this helps, Organoman.

I think adding some calmag was the right step. Unfortunately that will not repair the leaves that are already damaged. Keep your eye on the froth that wasn’t affected to make sure the problem isn’t still effecting her. I like to remove damaged or yellowing leaves- but leave the health ones alone. They are her solar panels- fueling her growth- and with autos you really don’t what them slowing down. 🌱