what is doing this?

Im pretty sure... well I dont see any bugs anywhere...
what is doing/causing this?
I have been spraying with Sensi Mag/Cal... think I had a little Mag/nutrient defiency a few days back.. yellow and brownng bottom leaves, new groth looked fine.
Blue Dream has been looking good.. I topped 2 and fimmed 2 yesterday..

any ideas?

Browning leaves on bottom is usually nitrogen deficiency.

hotrodharley said:

Browning leaves on bottom is usually nitrogen deficiency.

Click to expand...

OK, thanks..this is left over/continuing nute deficency...
but they are greening up much better than earlier this past week..

im in Coco coir, any thoughts on run off ppms? mine seem high. they are going into the 4th week. feeding them 450ppm.. my run off ranges plant to plant 650ppm, 750, but one plant was 915..

pete7776 said:

OK, thanks..this is left over/continuing nute deficency...
but they are greening up much better than earlier this past week..

im in Coco coir, any thoughts on run off ppms? mine seem high. they are going into the 4th week. feeding them 450ppm.. my run off ranges plant to plant 650ppm, 750, but one plant was 915..

Click to expand...

A bit high. I go by a rule that I heard that works for me. If your runoff is more than 200 PPM higher than your feed you should just use pH adjusted water the next feeding. Your medium is retaining unused nutrients.