signet said: If it is then picking a daylily for its color may be more involved than just seeing an image on a sellers website.
Regardless of whether adding amendments to the soil can cause the color to change on daylily blooms, there is always a need to compare how blooms look in your garden compared to how they look on any site online, especially hybridizers sites. I don't think manipulation of bloom colors is as prevalent now as it was at one time, but I do see images still that look like they have been "photoshopped".
Blooms online that show an almost pure white base color will appear not nearly so white in my garden. I can't tell anything I add changes that difference, and I have not noticed much difference consistently here between pot grown and garden grown plant's bloom color. I am not saying that changing PH could not have some slight affect on daylily bloom color, but I don't think it would be worth the effort to try and change bloom color by manipulating PH. I think it is good to compare the bloom colors of plants grown in your garden to online photos try to detect any pattern in the color differences, then you will know more what to expect when looking at hybridizers bloom photo colors.
