How bad is the Foxtailing?

All the variables of light, heat, nutrient imbalance can fox tail can also be hormonal and genetics. You could trim the top foxtails to redirect auxins after the stretch

30c wouldn't do that.. it may have added to the effect slightly, but not the primary cause. I'd wager either genetics or too little light. Node spacingn seems fine, so unles you reduced light more recently, i'd lean genetics. if the stem elongation stopped (part of 'vege' growth), snap the stem about 6" below the height you want it to be (HST). Try not to damage the vascular tissue too much.. support at as needed, but within 24-48hours, you'll need to hold it down, not up. The top portion of brench will bend back toward the light - hence the suggested "6 inches below the height you want" if some vege growth remains, i doubt, break it down a bit lower. Anyway, that's better than the top being burned by the light. Nothing you can do about the growth pattern now. I've seen this trait on autoflowers more than once, but also rarely in photoperiods. I just had a couple in my last grow (2026-2). The stem elongation seems to linger into flower and causes stretched out buds / foxtailing etc... not unlike "Dr. Grinspoon" but less extreme.