Vpd, toxicity or deficiency?? please help

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warren1990

Member

Jan 26, 2014

• #1

not sure why the leaves are curling, definatley not heat stress but could be one of these issues. please help

 

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Ilovebush

Well-Known Member

Jan 26, 2014

• #2

Cupping leaf margins are usually associated with heat stress...

 

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warren1990

Member

Jan 26, 2014

• #3

25 to 28c lights are 16" away

 

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warren1990

Member

Jan 26, 2014

• #4

and its only a 250 hps with heatspread.

 

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warren1990

Member

Jan 26, 2014

• #5

Any help on this from a vet grower would be appreciated