First Grow - First Potential Plant Killer Need Help

Hello,

I have a 30 days old Moby Dick XXL auto in veg growing in a tent in a garage and Im afraid it might have powdery mildew. Temps have not been adequate even living in a desert we are still in our cold months so temps are ranging from high of low 70 to low of 60 and in the beginning a couple nights in the 50s. It may also be showing signs that it is ready to flower which sucks since its so tiny but also if this is powdery mildew I need to take care of is asap.

Water Schedule: Whenever it is dry. Ill look for moisture in the top inch or so and base it off how heavy the pot is. Last watered on 2/12.
Was foliar feeding with a mixture of 2 tbsp of Big Bloom diluted in a gallon of distilled water. The spots on it I thought were just left over Big Bloom that didn't really dissolve in the water all the way but I'm not sure if its just from last foliar feeding or if the new leaves are showing mildew.

RH: Still working on getting better RH but it has never gone over 30.

Medium: Fox Farm Ocean Forest

If it is mildew then what is the best way to handle?

That’s your foliar feed residue.
I wouldn’t foliar feed in a garage.
Actually I wouldn’t foliar feed an established plant with roots.
Doesn’t do much and asking for trouble.
You last watered Jan 12?

drsaltzman said:

That’s your foliar feed residue.
I wouldn’t foliar feed in a garage.
Actually I wouldn’t foliar feed an established plant with roots.
Doesn’t do much and asking for trouble.
You last watered Jan 12?

Click to expand...

Good looks, I fixed the date on the watering, meant 2/12. Thats interesting though. What about just foliar spraying water in general? Was doing it due to the low humidity in tent. I have a humidifier on the way. So far I've had only one other person look at those pictures and say it was powdery mildew. Debating on doing a "cleanse" of H2O2 + wipe affected looking leaves. But if you think its only the residue Im wondering if I should wait. Assuming this auto is about to start flowering I think I have some time before its a detriment.