Spots on leaves spreading by the day....possible cause and solution??pics

You didn't mention what nutes you are using. I would lower that nighttime RH to 60% or lower during flower. It looks like you have a phosphorous deficiency which can be caused by not enough food during bloom or too much of certain micro-nutrients built up in your soil locking out phosphorous. If your water ph is 6.5 I would bet the actual ph of your soil will be lower. I try to ph my water at 7 or used distilled water which is naturally ph'd at around 7 because as it leaches through the soil the ph lowers. Test your ph in the soil itself then the runoff and compare. Knowing what you are feeding her will help a lot with the diagnosis too.

I using the whole Fox farm line bb,gb,tb,os,beastie b, and cc.

I am currently putting in .5 tsp of big bloom, tiger bloom, and 1/8 tsp of beasie bloom.

Originally Posted by jpockets420

You didn't mention what nutes you are using. I would lower that nighttime RH to 60% or lower during flower. It looks like you have a phosphorous deficiency which can be caused by not enough food during bloom or too much of certain micro-nutrients built up in your soil locking out phosphorous. If your water ph is 6.5 I would bet the actual ph of your soil will be lower. I try to ph my water at 7 or used distilled water which is naturally ph'd at around 7 because as it leaches through the soil the ph lowers. Test your ph in the soil itself then the runoff and compare. Knowing what you are feeding her will help a lot with the diagnosis too.

Cool. Thanks for the quick reply man. I'll check the runoff.

Looks like P & K. 38% is quiite low RH and encourages over transpiration too, so the plants are drinking but not using the nutes. Ur RH is quite wide. You didn't mention temps so I guess they drop quite a bit at lights off to cause the high RH. Those leaves with more than 50% damage can come off. Waste of the plants energy to repair.