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Knockout Roses - Red

Scientific Name: Rosa ‘Radrazz’
Best Planted In Zone: 4-10


  • Description
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  • Planting
  • Care
Red Knockout Roses produce rich cherry red rose flowers with 5 to 7 petals. The rich cherry red 3" bloom will grow in clusters of 3 - 5 blooms. At mature height, the roses will be approximately 3 to 4 feet. Flowering begins in early summer & continues until the killing fall frosts. This colorful and disease resistant Knockout Rose is destined to find homes in many garden designs and also compliments any container garden display on the patio or terrace. This amazing landscape rosebush gives over 6 months of bloom and are even self cleaning, no more deadheading. They are fast growing, heat tolerant, cold hardy, and easy to maintain. USDA ZONES: Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9, Zone 10.
Most PlantMeGreen trees can be shipped and planted any time of year, unless the variety is specified as only seasonal delivery. Packages are typically shipped within 7-10 days from the time of your order. You will receive a tracking email upon confirmation of your PlantMeGreen purchase. On some occasions, severe weather and other unusual issues can delay shipping and delivery of your PlantMeGreen package. Delivery time cannot be guaranteed, if a package needs to arrive prior to a specific date, or at a more convenient time for you, please notate that upon placement of your order.
Dig the planting hole to be at least twice the width of the root ball. Do not plant too deep. This is essential. Planting too deep is the most common reason for young plant failure. The root flare zone, which is the top most root in the root ball, should be located just above the soil surface. If there is any soil above the root flare, scrap it off. It is recommended that you apply a thick layer of mulch around the shrub to help control weed growth. Use a regular watering schedule throughout the first growing season to help establish a root system.
Knockout Roses prefer full sun and well-drained soils which can either be loamy, sandy, or clay. Pruning knockout roses in spring involves trimming and shaping the rose bushes to your liking. Remove any broken or diseased wood, if you can find any. Deadheading these roses is not necessary unless you want to. Water regularly when the top 3” of soil is dry. It is recommended to feed the roses every four to six weeks with a slow release fertilizer of 12 to 6 to 6 ratio. The ratio 12 to 6 to 6 refers to the amounts of nitrogen, phosphorus, and phosphate present in the fertilizer. Roses are acid-loving plants and enjoy both synthetic and organic fertilizer. Use rose-specific or complete fertilizer, or fertilizer for acid-loving plants like azaleas, and supplement with organic fertilizers like bone meal, fish emulsion and rotted manure.

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