HELP! Top leaves with brown spots

[metaly]

Hi guys, how are you? First time grower here!

I'm growing in coco coir, it is the 3rd week of flowering and these spots are appearing in the top leaves. Im feeding it daily using the flora trio. The lights are Leds of 360W.

This picture was taken this morning when I first notice the problem: https://imgur.com/a/5oPa786

An these were taken a few moments ago (at night): https://imgur.com/a/qqPCTKE

I'm really scared that my plant may die so close to harvest. Anyone knows what this can be?

Thanks!

 

[alltatup]

Hi metaly, I can't see anything in the pink picture. You may be over-feeding: https://www.growweedeasy.com/flushing-sick-cannabis

I'm growing hydro and feed once a week; are your directions to feed daily???

 

[metaly]

Hi!

Sorry for the pink picture, I will take another one with lights off today. I'm feeding only 500ML each day and I collect 10-15% runoff. During veg I fed once every 3 days or so but during flower they seem very hungry, but still I may be overfeeding, this is my first grow 😅

Also a few of the bottom leaves are turning yellow and dying, but I thought it was due to a normal flowering process. I'm considering a flush but I never done one before. There are any chances of harming the plant during a flush? What if is calmag deficiency, a flush will make it worse?

Thanks for your help!

 

[alltatup]

No. Go over to gwe. And look up Nutrient Lockout. The way we feed our plants its rarely deficiency more likely pH issues and/or too much salt at root level.

 

[Canuck147]

I would be more concerned with the plant in the background. Pic 3 - looks like WPM in the background.