Mid-Atlantic Gardening: Show me your containers, 0 by Gitagal

Gitagal wrote:
This has puzzled me ever since I saw these bouquets. I LOVED these!!!!!

I know that is the many colors of yarrow somehow put into one bouquet---but HOW did they get them all together to look like ONE, big bloom? This was outside a HUGE Cemetery--where flowers are sold to be taken to grave sites.
I asked how these can be grown (thinking they were all ONE flower) -and got a typical, evasive answer---"AHHH---ONLY in one's garden!".....

I was sent a packet of seeds of the multi-colored yarrow after i got home--but only 3 of them germinated and I have NO idea where they are now??? People there are NOT going to divulge their "secrets"!
It is their livelihood to create--and to sell.....