leaves yellow with brown spots and burnt tips

lambokid

lambokid

Well-Known Member
hello everyone im growing using 70% coco and 30% perlite I'm feeding daily im using canna brand nutes A/B im using 250w hps im in vegging still my leaves have brown spots on the the edges and tips look burnt and crispy and curling upwards temps are 25.5 during lights on and 22.3 lights off please help
 

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FastFreddi said:
Research possibly magnesium issue due to lockout.
FF
Click to expand...
I've done research buddy I've looked all over Internet and can't seem to find anything similar apart from magnesium and potassium I've been using like 2.5ml of calmag with every feed with 20% run off not quite sure
 
Over fed to the point of lockout
Probably due to not enough light
I never tried an HPS in veg but based on your results I doubt I ever will
 
Try moving the light away. 10 inches is very close for hps even at 250w. If the light is to close the leaves will burn through way more water and pull way more nutes with it causing all sorts of issues.

25c also on the hotter side. Not a big issue. But elevated heat and close light will nuke a plant.

Raise the light and lower your ec a little. See how they respond.
 
Failmore said:
Try moving the light away. 10 inches is very close for hps even at 250w. If the light is to close the leaves will burn through way more water and pull way more nutes with it causing all sorts of issues.

25c also on the hotter side. Not a big issue. But elevated heat and close light will nuke a plant.

Raise the light and lower your ec a little. See how they respond.
Click to expand...
ok thank you
 
lambokid said:
I've been feeding about 0.9 ec and lights are about 10 to 12 inches away from tops of plants
Click to expand...
Light is WAY too close and it looks to me like they are starving of N. Flush them thoroughly with a higher ec, say 1.4 , see how they react , then go back down to "normal" feeding.
 
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