I dusted some over my veggie garden last year (figured soil was depleted after years of veggies in the same spot) and think it had a good effect... glad to hear of a specific benefit for peonies... it's too pricey for me to put it over all the garden areas each year, but I could use it on the peonies!
Has anybody tried it on oriental or OT lilies? I don't want my new ones to peter out after a few years... and I bet feeding them better is the answer.
I know... "don't guess, soil test!" Somehow I don't get around to it.