I don't normally ask advice about deficiencies as I believe it is something to work through yourself - this has worked for me up until now for the past few years, but this one is stumping me.
https://drive.google.com/open?id=0B-S3FwfLrLBseENmMlB5WVUzT2M
I want to believe potassium, but something else is telling me iron. I have plenty of both going in, but maybe there is something inhibiting the iron (too much phosphate?).
Either way, ideas are welcome especially if you've had this identical problem before. If it's any help, my rotala rotundifolia old leaves are displaying blackish/brown scars and are a very dull/dark glossy green colour.
Apart from that everything else seems to be growing fine and new growth is not affected which is confusing me since it appears to be a macro issue.
Thanks in advance.
https://drive.google.com/open?id=0B-S3FwfLrLBseENmMlB5WVUzT2M
I want to believe potassium, but something else is telling me iron. I have plenty of both going in, but maybe there is something inhibiting the iron (too much phosphate?).
Either way, ideas are welcome especially if you've had this identical problem before. If it's any help, my rotala rotundifolia old leaves are displaying blackish/brown scars and are a very dull/dark glossy green colour.
Apart from that everything else seems to be growing fine and new growth is not affected which is confusing me since it appears to be a macro issue.
Thanks in advance.