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Check out our comprehensive Roses Growing Guide to learn how to plant.

The bushes are cut back again at the end of August or early September. The pruning is not as severe; usually we cut them back about one-third the height of the bush. If you want your roses to grow tall and large to form a screen, you would do lighter pruning and cut out any dead wood. Apr 08, You’re free to prune your knockout roses as soon as that last hard frost finishes thawing. We recommend cutting back about ½ – ⅓ of the total growth, which is usually between 12 and 18 inches.

If you find that your rose bush is becoming too large and unruly, you can cut the entire bush down to about 1 – 2 feet high in the spring. Feb 13, Pruning landscape roses is easy: come spring, cut out any old or dead wood and then trim the whole plant back by about half its height. That’s it! No need to be fussy with these vigorous, easy going varieties. The Oso Easy series is a great choice if you don’t want to deal with heavy pruning or constant deadheading.

Plus, they’re also highly disease resistant- which means no spraying either! Jan 17, As fall begins, rose bushes usually close up and stop blooming.

To maintain the health of your plant, try to cut it down by about ⅓, make your cuts at a 45 degree angle, and cut off any dead or diseased branches that can cause trouble for your plant as the weather gets colder. Steps%(4). Nov 28, Heavy pruning of rosebushes is best done when they are dormant, but if you trim a rose bush correctly in the summer, you can increase its late-season bloom.

When to trim rose bushes in tn. Prune to remove dead or diseased growth at any time though it is best to avoid major pruning from late summer through early winter as the shrubs will be starting to go dormant.

For most other types of roses the best time to prune them is in late winter or spring right after your last frost date.