QUESTION: I think that four of my Knockout rose bushes have rose rosette disease. If I remove all four bushes, what do I need to do to the ground before I plant new Knockout rose bushes in the ...

While there are several fungus diseases that affect roses, the most prevalent problem in the hot humid South is black spot.

This disease can spread from rose bush to rose bush so identifying and acting diligently is a must. At one time the Knockout Rose was thought to not be susceptible to this mite but has since been ...

When you’re ready to plant, dig a hole about two ... says Mortensen. Generally, Knock Out roses are less susceptible to diseases and pests that affect roses. During harsh summer conditions ...

Roses do not have thorns; they have prickles. But there ARE “thorns” in the rose garden. Their names are botrytis, black spot ...

The Knockout rose is facing a serious viral disease called rose rosette. Once infected, a healthy plant starts producing Medusa-like bunches of new bright-red shoots. These shoots bloom ...

Its appealing characteristics are well documented — excellent disease resistance ... Fertilize the bushes immediately after this pruning. Knock Out roses and other repeat-flowering landscape ...

They were also extremely resistant to insect and disease problems ... We always loved selling Knock Out roses, and we still do, because we knew it was a plant that would bring easy success ...

Another major selling point of Knockout roses is their resistance to disease. "Black spot is a common problem for roses, causing leaves to fall off," says Reeves. "But Knockouts are highly ...