Given half a chance, Picea abies ‘Pendula’ would end up weeping over the land as a groundcover. But with a well-placed support and training over the years, weeping Norway spruce can reach up to 15 feet in height. Hardy to Zone 3, this evergreen is an extremely slow grower: It can reach about 5 feet in height in 10 years but then can take decades to reach its mature height. As a transplant, it will require watering in its first year to help establish a solid root system. After that, its needs are modest, with its greatest demand to be in full sun with that stake for an upright posture.