How to Grow a Knock Out Rose Shrub


Created by Bill Radler in 2000, knock out roses are the most disease resistant rose in the market today. These drought-resistant roses are easy to care for and maintain, and are self cleaning, making them a popular choice in gardens in northern United States. They bloom from early spring to end fall, decorating a spot with their brightly colored blooms available in a wide range of colors. These roses grow on shrubs that reach a height of 3 to 4-fall tall, and equally wide if left to grow. Add these perennials to your landscape for a burst of vibrant color, beauty and convenience.

Step 1

Lay the nursery bought container on its side and roll it from side to side to loosen the contained knock out rose plant. Check the size of the root ball, and dig a hole 6-inches wider and deeper over an area that has loamy soil, and gets up to 8 hours of sunlight everyday. Collect the dirt to a wheelbarrow. Add a layer of compost into the hole and water well to ensure it goes deep.

Step 2

Add rose fertilizer to the collected dirt in a wheelbarrow. Follow label directions for the amount needed. Lower the knock out rose plant in the hole and backfill with the soil in the wheelbarrow. Tamp the soil down with your fingers and water the soil to ensure it is evenly moist.

Step 3

Mulch the area around the base of the knock out rose shrub to prevent evaporation and weeds. A 2 to 3-inch deep layer will suffice.

Step 4

Feed your knock out rose a 10-10-10 fertilizer every month. Follow manufacturers directions for application rates, and water immediately afterwards to release nutrients in the soil.

Step 5

Water the knock out rose once every three to five days for the first two months, to help the roots establish themselves. Reduce watering to an inch every week afterwards. Water at soil level to prevent getting the foliage wet, which increases the risk of disease.

Step 6

Prune the rose shrub once a year, preferably in mid to late winter. Use a sharp and clean pair of pruning shears to snip off dry, damaged or diseased stems, thus improving the health and appearance of your shrub. Also remove any wayward limbs to keep it in shape.

Step 7

Spray the roses with antibacterial soapy solution to remove pests from stems such as aphids, and pick Japanese beetles with tweezers.

Things You'll Need

  • Knock out rose plant
  • Shovel
  • Wheelbarrow
  • Compost
  • Garden hose
  • Rose fertilizer
  • 10-10-10 Fertilizer
  • Pruning shears
  • Antibacterial soapy solution
  • Spray bottle
  • Tweezers


  • The Conard-Pyle: The Knock Out Family of Roses
  • To Build a Garden: How to Care of Knockout Roses
Keywords: knock out rose, growing roses, rose shrub

About this Author

Tanya Khan is a freelance author and consultant, having written hundreds of thousands of words for various online and print sources. She has an MBA in Marketing but her passion lies in giving her words wings.