Plant Patent #11,836. Cultivar name: ‘Radrazz.’Perhaps the best ever landscape Rose for four-season interest, this stunning hybrid is the culmination of breeder William Radler’s lifework. Not only is it the most blackspot-resistant Rose we’ve ever grown, but it also stands up to Japanese beetles and other pests, blooms over an exceptionally long period, and offers foliage and fruit interest as well as lovely blossoms. Exceptionally hardy and disease-resistant, Knock Out? is also breathtakingly beautiful, with great clusters of 3 1/2-inch blooms of fire-engine red (or lighter cherry-scarlet in hot climes). These flowers begin early in Rose season and continue for many weeks. The shrub then rests for a bit, and repeats for the remainder of summer and well into fall! It’s one of the longest bloom cycles in the Rose family, and will fill your garden with bright color and subtle tea scent. And when the blooms finally end, the color continues with burgundy-violet fall foliage and orange-red hips. Crown-hardy to -20?F, this 3- by 3-foot shrub sneers at drought, humidity, and pests such as blackspot, Japanese beetles, leafhoppers, and rose midge. It is essentially maintenance-free, although like any new addition to your garden, it appreciates pampering the first season or two.Knock Out? was bred from a seedling of R. ‘Carefree Beauty’ x a seedling of R. ‘Razzle Dazzle.’ It has become so immensely popular since its introduction that new Knock Outs are arising each season. We recommend Pink Knock Out and Double Knock Out. Knock Out? never needs deadheading “Rosa Knock Out? PP#11,836″