The lowly US native arborvitaes still don’t get the respect they deserve. Because they are so easy to grow and propagate, their widespread use in places from trailer parks to fast food restaurants, cause many plant snobs to dismiss them as too common. The diversity in the genus is absolutely amazing, and as a landscape designer, it’s a plant I wouldn’t be without. There are two native species, Thuja occidentalis, which ranges from Canada south to Georgia in the Eastern US, and Thuja plicata, which calls the Pacific Northwest home. Both species grow well in our hot, humid part of North Carolina. The other overseas members of the genus are Thuja koraiensis (China, Korea), Thuja standishii (Japan), and Thuja sutchuenensis (China).
Thuja occidentalis ‘IslPrim’ is a dwarf, rock garden-sized selection that resembles an Hinoki Cypress. This gem matures at 4′ tall x 1′ wide.
I’ve really fallen in love with Thuja occidentalis ‘Jantar’. This solid gold sport of the industry standard, Thuja ‘Smaragd’ was discovered in Poland. This should mature around 15′ tall x 3′ wide.
Thuja occidentalis ‘Polar Gold’ (SMTOYB) is Spring Meadow Nursery seedling selection that has performed well in our trials. The mature size is listed at 15′ tall x 6′ wide.
We love the orange gold color of Thuja plicata ‘Fluffy’ (SMNTPGF) in our garden. Although the mature size of this Spring Meadow Nursey seed selection, is listed at 15′ tall x 6′ wide, the very fast growth rate makes us expect that it will exceed this size.
I could tell from the first half of the involved portmanteau cultivar name that the first selection was going to be from Iseli. And you are leaving out trademarks because a thing is not a trademark. But: in a couple of them you have included unpronounceable capitalized codes. So, I am wondering how these fit through your filter resulting from what you have said about the “mess” commercial interests have made of garden plant names.
https://iselinursery.com/colorful-conifers/thuja-platycladus-arborvitae/thuja-occidentalis-primo-islprim/
It’s always tough to decide which name to use, since companies intentionally skirt the intentions of the International Nomenclature Code, which is unform, unfettered communication. Since it’s not legal to trademark a product or the name of the product, we try to only use legally used trademarks…unless we are legally threatened by some of the most greedy violators. If we feel the name can be reasonably pronounced, we use those names, but its done on a case by case basis.