I meant to say copperleaf. Dave's Garden says that Irish petticoats and Hoffmannii are one in the same. Curly Ruffle might be another name for it too.

focus..peeps ... yes.. it is improperly sited ... the dude planted it.. for the size it was at purchase.. with no concept of it future potential ... though it can be beaten back with pruning .... its still a few feet too close ... go back to google pix... see link .. and look at the natural shape .... its more of a half ball on the ground.. and a round ball if trimmed up ... i am sure you can appreciate.. its never going to do that there .. without blocking the stairs .... after it blooms.. you can move it ... insure there are no utilities there ... and even if you kill it.. it will be in a better place.. lol ... either better sited.. or dead .. lol ... see second link on planting a tree/shrub ... proper watering for the rest of the summer would be the most important thing, after the move ... ken images https://www.google.com/search?q=Prunus+x+cistena.&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjUtK-CxO7PAhWFaD4KHZPjAbsQ_AUICCgB&biw=922&bih=745&dpr=0.9 ============= planting and watering https://sites.google.com/site/tnarboretum/Home/planting-a-tree-or-shrub

I live in zone 5, Maine. I'm focusing on flowering native shrubs: Kalmia (Mt. Laurel), native evergreen rhodos, and blueberries. Possibles on my list are a dwarf redbud or a dogwood, clethra Ruby spice and Baptisia. The garden that came with the house has a bunch of lilacs and hydrangeas, a magnificent magnolia and a lovely crabapple. Many of those should work for Colorado and many Maine natives will also be native in CO. You want to check your soil type. When I moved, it wasn't a huge difference of climate, but the soil changed from damp, alkaline clay to acidic soil that is very fast draining. That's one reason for choosing natives --- they are probably going to like your soil. I had to change some of my gardening practices, too. If you make a big move (mine was from a different continent) you discover that many gardening "facts" are actually rules of thumb that work for the climate and soil where they originated and often explanations are based on that. I tried to grow spinach, always called a cool weather crop that bolts in summer heat, outside of Moscow, where the summers were cool. It barely grew and then bolted overnight. It turns out that it bolts when the days get long and so far north, the days got long too quickly.

Really how close are the neighbours? IMO a fence creates enough privacy for most people and any kind of tree has roots and with all that hardscape those roots will never get enough water so they will be looking for water where ever they can find it which could be right under the hardscape.IMO too much paver in relation to green space .