This long-blooming, easy-to-grow perennial comes in many desirable varieties. But watch out: One is an invasive knotweed. I recently came across an article in my wife’s The English Garden magazine ...

Years ago, I ordered a perennial from an online catalog simply because the description read, “Looks perfect planted in front of a stone wall.” Our old farmhouse is fronted by a 4-foot-tall wall of cut ...

STILL going in gardens and boosted by the recent spell of warm weather, a number of forms of persicaria offer a good show of colour through the late summer and into autumn for flower beds and rock ...