beckygardener said:So that made me question in my zone whether most all daylilies could continue to bloom/rebloom given the right conditions. Or do some cultivars only have the initial bloom period and don't bloom again for another year.
I think that all daylilies can rebloom or simply continue to produce scapes given the right conditions. There are tens of thousands of daylily cultivars (and of course quite a few original species) so it is impossible to be certain that absolutely all could but the professional daylily growers/hybridizers in California and Florida have indicated that all or nearly all daylilies can rebloom given the necessary growing conditions.
Is there a particular fertilizer ratio that encourages scape/bloom production? I know the more fans, the more scapes.
I do not know and I don't think anyone has published particular fertilizer ratios that encourage scapes/bloom. However, I did recently post the amount of nitrogen that is optimal for growth in another thread. To get rebloom or produce the next scape the fan must produce the necessary number or size of leaves to become 'mature' and bloom. To do that one needs growth and the quicker the growth and the more growth the better. That often means relatively high nitrogen ratios and I have found that to be the case in my test (also described in the other thread). I am in zone 4 with a relatively short growing season without a large number of growing degree days (a measure of its length and heat). I have 'J. T. Davis', 'Ruckus' and 'ForestLake Ragamuffin' reblooming this year because I provided them with high nitrogen both last year and earlier this spring.
Once the nitrogen needs have been satisfied then some other factor becomes limiting - that may be water or some of the other elements need for growth.
