help?? yellow and brown spots on leaves

cxms

Member

• Dec 12, 2020

• #1

hey guys

if you can help

week 1 of flower

canna newts
cal mag and magnesium is added
growers choice 720 LEDS
flood and drain hydro rockwool

why do my plants have some of these leaves?

 

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hotrodharley

Well-Known Member

• Dec 13, 2020

• #2

Excess potassium in your feed.

 

cxms

Member

• Dec 13, 2020

• #3

hotrodharley said:

Excess potassium in your feed.

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p is below what normal feed is. thinking magnease

 

hotrodharley

Well-Known Member

• Dec 13, 2020

• #4

If it’s actually manganese the leaves would finish going to hell in a hurry. Good luck.