Petite Knock Out® RoseTrue Red Roses on a Compact Form Why Petite Knock Out Roses? The latest addition to the Knock Out family, the Petite Knock Out Rose Shrub gives you the best of both worlds: True red blooms on a small form and the carefree Knock Out benefits you love. So, you get big red blooms from spring through fall, upgrading your curb appeal for months at a time just in a smaller, more compact form. And the Petite requires virtually no upkeep. Despite its compact