Roses, long a gardener's favorite and our country's National Flower, still suffer from the reputation of being hard to grow. In reality, many modern roses like 'Knock Out' are robust, long-lived, ...

Last year, I noticed the yellowing and spotting of some of the leaves on my Knock Out roses. The same thing is happening this year. Can you diagnose and suggest what to use? For some reason, I thought ...

Prune Knockout roses heavily in late winter or early spring as new growth begins. Lightly deadhead and shape in late summer, stopping two months before frost. For annual pruning, cut back one-third of ...