Mop head hydrangeas are legitimately the best behaved shrub of all time, except for ( boring ) boxwood. I'm honestly not a huge fan of the flowers, maybe because I've seen them every year of my life.. all over the exact same plants....but they live forever, mature quick, tolerate dense shade, crappy soil, max about 4 feet tall, put up dense foliage so early in the spring they never need to be weeded- (and I live under a giant oak tree next to a woods full of invasive wild grape and kudzu.. .) they need a lot of water their first year... but once they're in, you're golden.. if they were evergreen they'd be the perfect landscape plant.
