A research article that looked at fertilizer versus number of daylily blooms is this one,
Chen, Yan, et al. "Controlled-release fertilizer type and rate affect landscape establishment of seven herbaceous perennials." HortTechnology 21.3 (2011): 336-342. See Table 1 for number of flowers for different treatments. As far as I recall (haven't re-read it) the fertilizer analyses were similar but the amounts given differed.
http://horttech.ashspublicatio...
Might be easier to read as a PDF:
http://horttech.ashspublicatio...
