We get really excited about adult (mature) forms of ivy (Hedera) that are shrubs (arborescent). Juvenile (young) ivy vines, like a young child, run around the garden and get into things they shouldn’t. Like kids, ivy goes through puberty, which happens only after it crawls high (30-40′) into a tree or other tall object. It then settles down, stops running and becomes woody, with a compact, evergreen growth habit. It also begins flowering (an amazing pollinator attractant), sets attractive fruit, and we have seen no errant seedlings in our trials.
Just as adult people grow rounder with age, arborescent ivies also change shape and the leaves lose their lobed appearance and the growth becomes dense and woody. By propagating from these difficult-to-root adult parts of the plant, the adult ivy plant retains the mature characteristics and no longer feels the need to crawl around and conquer the rest of your garden.
We have offered selections of adult ivy in the past. We feel they offer a great year-round interest feature in the garden but they have not been particularly well received (maybe this is due to the stigma inherited from their younger siblings). Would adult forms of ivy be a plant you would like for us to offer again?