We’ve all seen them in gardens everywhere, struggling to survive, hanging on until they succumb to their circumstances. These are very often the plants we impulsively purchase on a trip to the nursery only to realize they don’t fit anywhere in the garden. They can be too tall and/or wide to fit the spot chosen for them, shade lovers planted in full sun, thirsty in a dry spot, almost guaranteeing a short and unhappy life. The consequences of such a helter-skelter...