Relatively pest- and disease-resistant, the Knock Out rose continuously features flowers 1 1/2 inches in diameter in coral, ...

The spotted yellow leaves are the result of black spot disease. Knock Out roses, in general, are quite resistant (not immune) to black spot disease. During wet weather conditions, however, even ...

Roses go through two years of testing by the American Society of Roses. Knock Outs tested so well that they thought they were ...

SHREVEPORT, Louisiana (KTBS) — Both Knockout and Drift roses have become favorites in both residential and commercials landscapes due to their low maintenance and impressive blooming cycles.

Knock Out roses, in general, are quite resistant (not ... Turning an infected leaf over, you will see orange raised spots on the back of the leaf. The rusty orange spores will rub off on your ...