Viewing post #2547212 by admmad

sooby said: it was a clearer pink and the red eye was redder on the only cultivar I remember, 'Siloam Cinderella'. ... Lowering the pH did fix the interveinal chlorosis on the daylilies suffering from it (which turned out on analysis to be manganese deficiency caused by the pH).

Manganese has been shown to affect anthocyanin levels; I assume that a deficiency could cause colour differences in the flowers and correcting the deficiency could produce changes in the anthocyanin pigment levels.