To insure continuous flowering, feed your roses with a fertilizer blended especially for Knockout roses after each bloom cycle (ie. 3% N, 4% P and 3% K with 9% Ca, 0.5% Mg and 1% S).

A real sensation, well, a knock out, if you like. Loved for their easy opulence and lack of disease, in the capable hands of ...

The Coral Knock Out rose features a beautiful, unique coral color and performs stronger in hot, humid climates. It maintains an upright to rounded habit, and it blooms from spring through fall.

"Double Knock Out is our best-selling Knock Out," says Mortensen. With blooms that last the entire season and an extreme resistance to diseases, it's no wonder that gardeners love this rose type.

Question for Dan Gill: Last year I noticed the yellowing and brown spotting of some of the leaves on my Knock Out roses. The same thing is happening this year.