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Paul Krombholz wrote that Rotalas seem to be sensitive to heavy doses of
nutrients, producing tiny distorted new leaves. I have so little experience,
but I thought I would ask if there was another possibility. Could it be that
the extra nutrients pushed plant growth into a new deficiency?
I saw growth that sounds just like that, and very severe, on my Rotalas
(indica var. red, and macrandra var. narrow leaf) when I started using
phosphate fertilizer. The plants grew much faster and larger leaved, and
then developed those symptoms, for the first time (I'd had them for a year or
so). If I remember correctly, increased calcium reversed it (I wasn't
reconstituting my ro water very well back then).
Other types of deficiency symptoms that I'd never seen before followed
right after that- I think one might have been Boron, and the other maybe even
Copper. I wasn't able to address those very much before I changed the whole
set-up. Now lower light and no phos. fert., but still have the one that may
be Boron defic.