Light burn? Recently switched to quantum board

R

Ramborfc1

Member
Switched from 600hps to 600w quantum board in a 4x4 tent.
2.25ml per litre canna a and b, 2ml boost
Water is taken from 0ec to 0.4 ec with calmag.
Ph 5.9/6
Light is around 24 inches from plant tops
Some brown spots have appeared and it looks like the outer part of the leave is lighter.
 

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Dontjudgeme

Dontjudgeme

Well-Known Member
Ramborfc1 said:
Switched from 600hps to 600w quantum board in a 4x4 tent.
2.25ml per litre canna a and b, 2ml boost
Water is taken from 0ec to 0.4 ec with calmag.
Ph 5.9/6
Light is around 24 inches from plant tops
Some brown spots have appeared and it looks like the outer part of the leave is lighter.
Click to expand...
Any time I see those bronze colored spots on my leaves, it always ends up being either potassium or mag deficiency. Not saying either of the 2 are your issues, that’s just been the issue in my personal experience with my plants. Might not be a bad starting point.
 
C

CannaCountry

Well-Known Member
If you're feeding Ca, and it looks as though you're short, it's either
A) Not enough Ca
B) pH is off
C) Ca is locked out by another element
 
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