Rusty spots on some upper sugar leaves

Hey guys,

I've been growing my first Photoperiod after doing autoflowers for years and she's looking awesome. She's in w6 flower and still really fattening up.

A week ago a few brown rusty spots started appearing on the sugar leaves. First I thought calcium, but gave her calmag and they still appear. Then I thought pH, but I already fixed it (was at 5.5). Now I'm thinking I just made the soil hot by feeding a lot up to a week ago. What do you guys think?

bump

Everyone says this is cal or mag, but I've mostly seen this in pot-bound plants...

If it is that you're pot bound then it should progress slowly enough for you to finish...

MajorCoco said:

If it is that you're pot bound then it should progress slowly enough for you to finish...

Click to expand...

I don't think that possible, it's a 100 liter fabric pot. You think it could be overfeeding? I've got her on just water for now because I'm fearing it's some kind of lockout. The damage starts in the veins and spreads outwards