Purpling of the leaves

Hello brethren, chlorophyll starts to degrade below 67 anything below this will start to affect growth (not harm to a point, but slow). A cannabis plant's roots can no longer effectively uptake manganese below 64 IIRC which is really bad during flowering. If you are lowering temps to achieve "purples" you can blast it with chilling cold for 3 days of darkness before harvest to bring out the anthocyanins. Once your buds start to ripen you are looking to switch to colder temps as more focus is put on preserving terpenes such as mycerene which starts to degrade @ just 67. Dialing in temperatures and maintaining strict levels during different weeks of flower you can manipulate plant hormones. nO ISSUES matey! Its takes a lot to stop a weed from growing, what we aim for is to optimize the process as best we can, with all 9 cardinal rules in harmony plants grow at a tremendous rate, it is especially helpful for autoflowers too, early stage flowering you are still nitrogen hot, burnig phosphorus hard, its all about growth right now you want ambient 77 top of canopy 86, 87 or above will start to degrade trichomes, so be careful with heights, nothing below 70 at night, full steam ahead photosynthesis.