I had one other think it was zinc as well. And with "rusting" blotches that seems to be the case. My ph has been on brink of its high limits but the peat so far has reduced the ph. I flushed today to clear out any nutrient lock, ph imbalance, etc.. The ph of the water (which was distilled 6.0ph) didn't fluctuate anymore than 6.1-5.8ph. Little weird huh? I guess peat in its forms are all different. I wish though I had bought a mix, potting soil.

Anyways I'm going to look up the information on zinc deficiency. If I can treat it at same time of flushing I'm all for it. I put a very light fert mix (10% of reg) to try and get nutrients back to the plant. Maybee that'll add some zinc since it says on bottle it provides some (general organic - grow)