Brown Spots on my Jack!

My Jack herer has all these brown spots. What is this? Ive heard a mag def, but im not sure. Its weird all the other plants around her dont have them, only my jack herer. What is this and how can i fix it?

nobody can help me or give me any advice. I can't seem to pin point the problem.any advice novice to veteran is appreciated. I think magnesium def but I don't know or trust my novice ass.thanks.

Looks very similar to when someone foliar sprays with the lights on. Beads of water act like magnifying glasses and burn the spots.

DR. VonDankenstine said:

Looks very similar to when someone foliar sprays with the lights on. Beads of water act like magnifying glasses and burn the spots.

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thanks doc. To think of it I did spray a few days ago. I just don't get why only on my jack, not my super jack, that's right next to it.thanks again