Hi
psklouky:
Funny you should ask about that big old
Viburnum x burkwoodii cluster at the Iroquois Amphitheater parking lot in Iroquois Park in Louisville KY...
I planted those - along with the rest of the older landscape in front of the amphitheater - back in 2006. Glad to hear that you enjoy them; they are kicking pretty good for their age and exposure.
Burkwood Viburnum is pretty easy to grow from semi-hardwood cuttings, usually taken as new growth starts to firm up in June/July. You can grow them from seed as well, but they often take two years to germinate. You should be able to easily find information about this process online.
Here are some images from when those plants (and others) first were going into the ground. Let me know if there are any other plants you are interested around Louisville's parks, as I probably have had my hands on them sometime in the last 25 years.
Memories...