Double Knockout Roses

Double knockout roses are a favorite among garden enthusiasts. Learning how to plant these vibrant and resilient roses in your outdoor garden can bring it to life with minimal effort. In this article, we’ll guide you through the process of planting double knockout roses outdoors, so you can enjoy their beauty and long-lasting blooms.

Plant Overview

Double knockout roses are known for their striking, double-petaled blooms and their ability to thrive in various outdoor conditions. These roses come in different varieties, offering an array of colors to choose from. Their disease-resistant nature and adaptability make them an excellent choice for outdoor gardens. You’ll be pleased to know that the double knockout roses can actually grow in those hard-to-grow places of other plants.

What You Need

For outdoor cultivation, you’ll need the following:

  • Double knockout rose bushes
  • Well-drained, nutrient-rich soil
  • Mulch
  • Balanced rose fertilizer
  • Pruning shears
  • Garden hose or watering can
  • A sunny or partially shaded area in your garden

How to Plant Double Knockout Roses Outdoors

  1. Loosen it by using either a hoe or a shovel. Prepare your garden soil by mixing in compost and ensuring proper drainage. Mulch the area and add a good amount of fertilizer.
  2. Choose a sunny or partially shaded area in your garden for planting.
  3. Dig a hole that is about 20 inches deep and 18 inches wide.
  4. Remove the rose bush from its container and place it in the center of the hole at the same depth as in the pot. Be sure to add a little mulch to the bottom of the hole before placing the bush. Pat the ground to make sure that the bushes stay firmly in the soil to grow well.
  5. Fill the hole with soil, add mulch, and water the plant thoroughly.

Typically, it takes about three bushes for every three feet. This spacing requirement is appropriate since bushes usually grow to about that wide and around three to four feet in height.

Now, don’t shortchange yourself and just buy bushes without examining them first.

If the bushes do not look that healthy before you buy them, chances are, they won’t grow up healthy, too. So, make sure you purchase only healthy bushes to grow in your home garden.

Tips for Outdoor Growth

  • Water your outdoor roses regularly, especially during dry spells, but avoid overwatering.
  • Apply a balanced rose fertilizer in the spring and mid-summer to promote healthy growth and prolific blooms.
  • Prune your roses in the late winter or early spring to maintain their shape, encourage new growth, and remove dead or diseased branches.
  • Keep an eye out for common garden pests, such as aphids and Japanese beetles, and treat them promptly to protect your roses.

Dealing with Winter

If you live in an area with cold winters, you may need to take extra steps to protect your double knockout roses. Consider:

  • Mulching the base of the plant in late fall to protect the roots from freezing temperatures.
  • Wrapping the rose bush in burlap or another protective material.
  • Watering the plant well before the ground freezes to keep it hydrated during the winter.

Outdoor Harvesting Techniques

When grown outdoors, double knockout roses can be harvested as soon as they reach their desired size and bloom. Use pruning shears to cut the flowers, and enjoy their beauty in your outdoor space.


Learning how to plant double knockout roses outdoors can be a rewarding and straightforward experience. These roses are not only beautiful but also sturdy and disease-resistant, making them a fantastic addition to any garden. With the right care and attention, you can enjoy their vibrant and long-lasting blooms throughout the year.

Additional Resources: For more information on caring for double knockout roses and dealing with specific issues like winter protection, check out these resources:

Check out our other How to Plants here!