Reply To: Light stress !

[howdy howdy]

I am using a Spider  SE4500 setup in a AC Infinity 4x4x8 tent.  I am also using a wicking system with hydroponic nutrients.  I have wonderful success in the first 35-40 days of flower 12/12 cycle.  Excellent bud formation and a strong base. Tent is fully vented, and temp controlled. I think I have this part down.

My problem is at about 40 days it all comes crashing down.  The nutrients have been updated to the flowering cycle. Initially all seems ok.  Plants starts to look like it’s a nutrient problem but also seems like light burn.  I have been pressing the light percentage up to use more of the light spectrum.  I do not seem to be able to do anything to recover. Within days all of the buds have brown leaves instead of rich green of 7 days ago. The end product never fully develops.

Currently 2 different strains growing. One of them is not having any problem at all, so it’s not something that is spreading to other plant.  There is something going on with LED lights I do not understand, I think..

Getting tired of starting over, might go back to the old way.   Thoughts?