I recently added three stems of dwarf lobelia cardinalis to my tank in the foreground. What I noted was the much of the received growth had a reddish/pinkish underside and the leaf tops were a light, dull green. The new growth is all light green with no reddisk undersides. Much of the original growth has since fallen off, but the new growth looks nice and healthy.
46g bf, XP3 w/ vertical spray bar, CO2 w/ SMS122 & diffuser,100% Flourite, 96w+55w cf AHS, AGA Member