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rust spots on cannabis leaves

Rust spots on leaves

GD1576
BigCube

It could be rust. But I assume it would have spread to the others by now if it was. If it was nutrient build up, you think flushing would have stopped it. Not made it worse.

I’d be leaning more toward a deficiency maybe, like low in calcium. Are you supplementing calmag?

Another option could be your water source. Maybe too much chlorine I the water, but not likely since the other plants are fine..

If you can help us out, let us know your particulars. Feeding schedule, nutrients used, supplementation used, rh, avg temps. Ect..

GD1576
NairnM16
NairnM16

It could be rust. But I assume it would have spread to the others by now if it was. If it was nutrient build up, you think flushing would have stopped it. Not made it worse.

I’d be leaning more toward a deficiency maybe, like low in calcium. Are you supplementing calmag?

Another option could be your water source. Maybe too much chlorine I the water, but not likely since the other plants are fine..

If you can help us out, let us know your particulars. Feeding schedule, nutrients used, supplementation used, rh, avg temps. Ect..

Hey guys 2nd grow and I obviously have a problem. These rust spots on my leaves, what are they? Initially I thought lock out, so I flushed for 3 days but…