I got osmocote in small 2 oz bags for 10 cents each last year two different times at Menards! I think I have about 40 of those little bags now, so no excuse to not fertilize my lilies this year.
Going to pull them all this weekend and freshen up the soil, and give them some fertilizer, and drop them back in. Have two friends building small ponds this year, and they will both want a lily, so will repot a couple that I think I know what color they are. LOL
That recipe from your friend, JW, sounds really interesting, especially the steel wool part and the stuff to keep the bugs away. I haven't noticed any yellow leaves or bugs, though. Only yellow leaves are the old ones that are getting ready to die ... or that's what I always thought they were turning yellow from.