Tacoing after switching from VEG to BLOOM

Hi 🙋‍♂️, The leaves usually curl due to too intense light or problems in the root system. However, since you seem to be slowly approaching the harvest window, I wouldn't try to change anything here. Just let the lady unfold her maximum potential in peace during these last moments & keep the setup as it is. In the last flowering days, there isn't really such a thing as "too much" light with cannabis… that's my personal experience. Hope that helps 🤞🏽👊🍀

I doubt this is simply “too much red spectrum.” If PPFD is genuinely only ~150 at canopy level, classic light stress would be pretty unlikely. The tacoing makes me look at the leaf environment first: temperature, RH/VPD and especially direct airflow. A fan blowing continuously across those leaves can produce this even when overall tent conditions look fine. Check leaf-surface temperature too, not just air temperature. Also, PPFD tells you photon quantity, but changing spectrum can change plant responses somewhat — just not enough that I’d expect 150 PPFD to suddenly behave like extreme light intensity. I’d keep the light where it is for now and troubleshoot VPD → leaf temp → direct fan exposure → root-zone/EC before reducing PPFD any further. At 150 you’re already very low for a flowering plant.

There's something wrong here. Could be a light leak or serious stress, but apart from getting fried with the light with too much salt in your medium not enough H2O or water around the route, 150 PPFD is way too low for flower. You shouldn't shut off the veg switch when you hit bloom—run both switches simultaneously at full throttle to give them the intensity they actually need, otherwise they're starving.Also, double check your pH and EC levels in the runoff. When you let those salts stack up too high, it jacks up the osmotic pressure in the root zone. That osmotic pressure literally reverses the flow, pulling water right out of the plant instead of letting it feed, which causes that taco curl even under weak lights. Flush the medium with pH-balanced water to lower the EC and reset that osmotic pressure so the roots can breathe again.

Looks like wind stress and potassium/magnesium deficiency to me. not looking overly fed. many too quick switch of out feed? looks like they wouldn't mind a little nitrogen too they still need some to finish. overwatering cause this too yes. the light is not the cause of the taco in this case. they need more light. if they don't have correct ppfd they arnt gong to respond to the nutrients in the soil correctly. i have veg bloom mode on my lights but its a bit deceiving i still use a good portion of my veg lights during flower on my units.

Temps. Vpd. I would check roots, sometimes such tacoing shows up as root system issues. Lift pots, maybe you overwater. Leaves wont return to flat, thats fact.