Is there an advantage to removing the plumes? If so, before/ during/ after bloom? Planted three in a spot they seem to love (dry area). For the first 2 years I carefully removed EVERY flower bud, hoping energy would be diverted to taller plants. Warmer-than-normal spring yielded buds, then plumes -- all during our 2-weeks-away vacation. (Frankly, I prefer these withOUT the plumes but they will be too tall for my reach by next year.) Does one leave the plumes ON the plant? Do the plumes become dry and hard (as with lilac flowers)? Will these drop off in the autumn? If so, at the same time as the leaves are shed? Thank you in advance for any replies.