Nute burn or other issue?

[georgebush]

Just started noticing some issues on certain leaves about 3-4 nodes down.

Some leaves have a reddish brown discoloration on most of the leaf especially towards the tip 1/2 and others have black spots.

Currently in flower

PPM 2000 feed feed water (no runoff)
Water PHed 6.5
Soil (promix) PH about 5.5
Soil temp 73
Sealed
Room temp 78 lights on 78 lights off (dehu keeping temps up)

First time grower so go easy on me

 

[georgebush]

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[Emmay_Dee]

Soil ph at 5.5 is too low for flower. The issue looks like magnesium is being locked out by low ph because calcium is meneralizing faster than magnesium in the acidic conditions. Feeding it more Mag doesnt always fix the problem but a higher ph will help magnesium be more available to the roots so it doesnt have to eat its own mobile reserve.

~Peace~

 

[Emmay_Dee]

A higher ph keeps calcium more stable and trust me its always present in the soil. More nitrates are needed for mineralization of calcium then most other nutrients and lack of Nitrogen in flower exagerates this effect

 

[georgebush]

Just started noticing some issues on certain leaves about 3-4 nodes down.

Some leaves have a reddish brown discoloration on most of the leaf especially towards the tip 1/2 and others have black spots.

Currently in flower

PPM 2000 feed feed water (no runoff)
Water PHed 6.5
Soil (promix) PH about 5.5
Soil temp 73
Sealed
Room temp 78 lights on 78 lights off (dehu keeping temps up)

First time grower so go easy on me

Soil ph at 5.5 is too low for flower. The issue looks like magnesium is being locked out by low ph because calcium is meneralizing faster than magnesium in the acidic conditions. Feeding it more Mag doesnt always fix the problem but a higher ph will help magnesium be more available to the roots so it doesnt have to eat its own mobile reserve.

~Peace~

Thanks for the info Emmay. Any suggestions for this current cycle or do i just ride it out and amend the soil with lime for the next time around?

 

[Emmay_Dee]

Mix a tablespoon of lime, bone meal or diatomaceous earth to a litre of water. dont worry about ph it all changes in the soil to acidic anyway.

~ Best of Luck~