what could this be? pictures included

treesforme

Member

Nov 18, 2013

• #1

Hello everyone I am seeing a trend of yellow/brown tips and yellowing of leaves, not quite sure what the issue is here. I water with RO ph'd to 6.5-7, soil run off is at 6.7. Girls are 2 months old roughly. Run off ph was at 1000 today

 

chewberto

Well-Known Member

Nov 18, 2013

• #2

Are you adding cal/mag to the RO water?

 

treesforme

Member

Nov 18, 2013

• #3

Thanks for the reply, yes I give roughly 5ml (160ppm) of calmag with every watering. It looks like nitrogen deficiency to me, maybe? What's with the tips turning browing and curling/drying?

 

chewberto

Well-Known Member

Nov 18, 2013

• #4

Are there a lot of fans blowing on them directly?

 

treesforme

Member

Nov 18, 2013

• #5

Yeah I have 3 oscillating fans about one foot from the plants. Why?

 

chewberto

Well-Known Member

Nov 18, 2013

• #6

Because of Wind burn!