So it's been a few days now. After doing some more investigating I thought it might be an MG problem. The leaves started to curl up a bit. I bought some Cal-Mag and used 50% strength and sprayed in on the leaves. Didn't help. The problem continues.

I read some more and thought purhaps I mis diagnosed and maybe it was actual a K problem. So, once again I sprayed the leaves with a higher K and still nothing.

It's getting really bad. The problem starts as small brown/copper dots in between the veins. It then quickly progresses into larger brown/copper areas. Eventually taking over the entire leaf. It started on the lower leaves and has been makeing its way up the plant. After a few days the leaves turn all brown with just a hint of green patches, brittle to the touch (in fact with I touched the leaf it crumbled)

Please help with any suggestions. I'm using GH 3 part formula in a hydro drip system. Currently I'm using a (18-8-24) formula (that's 3-parts Grow, 2 parts micro, and 1 part flora). 400mh lamp about 20 inches away from the tops of the plants. My PH was at around 5.9-6.0 but after reading that K is absorbed at around a 5.2-5.6 I lowered my PH to around 5.4-5.5 hoping that it would absorb the K.

I have also flushed the system to rid it of an salts that might be locking up the rockwool. Still no luck. I'm affraid they are dying. Please take a look at the pics and let me know what you think. The one on the left has always given me some problems, you can see it is a little stunted. The one on the right was doing good until recently. Now it is becoming like the one on the left.

Please help!
hbbusa28 Reviewed by hbbusa28 on . Brown/copper spots on lower leaves First time grower needs some help. My plants are about 2-3 weeks old and recently I've noticed some brown/copper spots on the lower leaves. They started near the middle of the leaf in between the veins as a single brown/copper spot and started spreading though the rest of the leaf. Now on one of the most effected leaves some of the brown/copper spots are turning yellow/white (but that color isn't spreading through the leaf it is just the spots). I have two plants (one of them didn't Rating: 5