That's what the lady said. In their first year, "give zem horse sheete, yes, plenty sheete of orse', which of course I knew to be horse manure. I'm refering to the kindly advice given by the vendor who sold me five roots of eremurus himalaicus at a plant fair last Autumn.
I didn't hit them with dung at the time of planting, but still, they've done well, almost shining like white candles on a grey day. So now I'm a confirmed member of the foxtail lilly appreciation society.
P.S. The French for horse manure is fumier de cheval.