Double Knock Out® Rose
Shrub
- Cherry-red flowers bloom for over five months!
- Renown for its resistant to black spot and powdery mildew.
- Thrives in heat and humidity; cold tolerant, too.
- Grown on its own roots - not grafted. No special protection or fussing required.
- Zones 5-9, sun, 4' tall x 4' wide at maturity.
ZONE
EXPOSURE
HEIGHT
Description
Details
Patent #: USPP 16,202
Common name: Rose
Zone: 5 - 9
Sun exposure: Sun (> 6 hours sun)
Height x width: 3-4' x 3-4'
Flower color: Cherry-red
Foliage color: Green
Bloom season: Summer-fall
Bloom time: Summer
Features: Privacy & screening, heat tolerant, container plants, cold tolerant
Uses: Accent, border, container gardening, cottage gardening, foundation planting, ground cover, hedge, massing, ornamental, specimen
How to Grow
Light: Sun (> 6 hours sun)
Water: Try to keep the soil evenly moist, especially in their first growing season. Never allow the foliage to remain wet into the evening; water early in the day.
Spacing: 3 - 4 ft.
Fertilizing: To keep the flowers coming, feed your roses with a fertilizer blended especially for roses. This can be done after each bloom cycle.
Winterizing: Spread a layer of composted manure, compost, or shredded leaves over the base of the plant in late fall after the ground freezes. Covering these mounds and the lower parts of the bushes with evergreen boughs will add protection. Pull the mounding material away from the stem as new growth emerges in spring. Prune injured branches over when new buds emerge in spring.
Maintenance & pruning: Prune to remove deadwood, to control or direct growth, and to promote flowering. Wait until growth breaks in early spring before pruning. Every 2 or 3 years, remove about one-third of the old branches to stimulate new, fresh growth. There is no need to remove faded flowers because these roses are self-cleaning.
Plant spacing is based on the ultimate width of the plants. This figure is normally given as a range; for example, 3-5’. If you live in a cold climate and/or want plants to fill in more quickly, plan to space at the shorter end of the range. If you live in a warm climate, are on a limited budget, or are willing to wait longer for plants to touch, use the higher end of the range. Using the larger number is recommended when calculating distance from a building or structure. There’s really no such thing as "maximum spacing": if you don’t want your plants to touch, you can space them as far apart as you’d like. All plant spacing is calculated on center, or in other words, the centers of the plants are spaced one half of their eventual width apart:
Unless you are planting in a straight line, as you might for hedges or edging, space your plants in a staggered or zig-zag pattern for a more interesting and naturalistic look:
Not sure just how many plants will fit in your garden? Our calculator gives you the exact amount of plants required for your space. Simply update the values and the calculator will re-calculate accordingly. Spacing information can be found in the 'How to Grow' tab on each plant's page.
Happy, healthy plants. Always packaged perfectly. Growing really well. Can’t wait for them to fill out.
Knock out roses. had two orders and both are doing well. One order was of a larger cane andt he second more shrblike. Bottom line about a month both look the same. Healthy happy and growing well...
When the plants arrived 50-60% of the dirt was inside the box. One plant was 90% dead the other one was about 30 % dead. I repacked the dirt. 3 days later the one plant was dead. The last plant is almost dead. I want a replacement order. WP
Hello! We’re sorry that you received plants that are not up to our standards. We try our best to provide excellent plants, but some factors, like shipping and handling, are outside our control. That’s why we have a 60-day guarantee on all of our orders. Please email your order number and pictures of your plants to [email protected] to start the claims process. We look forward to helping! https://bit.ly/ggp-guarantee
My roses are beautiful, healthy, and thriving, but the blooms are hot pink, not red. It's too late now to plant a replacement. Also, I emailed with a question, and it took 5-6 days B4 I got a response. I thought it would be sooner, given the roses are delicate and new.
Very small root ball. Plant is tiny! Ordered 5 knock outs and 6 other rose plants. Received 11 knock outs. No customer support numbers! Don't deal with this company. .
I bought 14 of the Double Knock Out roses. All serviced but 2. No way to replace them from the website.
We're sorry you're having trouble with your plants. Our team of horticulture experts would love to take a closer look! Please contact us at [email protected] with your order number and photos of the plants so we can better assist you. All orders are covered by our 60-day guarantee. We look forward to helping! https://bit.ly/ggp-guarantee
Don’t think i haven’t gotten a response to my email about my plants yet to rate.
Hello! Please check your email for any further communication. We look forward to hearing from you!
They came well packaged and healthy.
Arrived healthy and beautiful
The plants are soooo healthy! Growing very well! Best mail order plants O have ever had! First time purchasing from your company! Looking forward in placing another order soon … deciding on plants now!!!
There was one bloom and that was it.
Bought 5 knockout roses & they are doing great, even have blooms.
They even came with a couple of buds on each of them. So far-so good. They seem happy.
I have purchased several knockout roses from Great Garden Plants and have
been delighted with the quality, price and shipping of these plants.
The plant grow so fast.
The plant has adjusted well. It has grown quickly and has produced several buds.
Purchased 44 two months age. Arrived in very good condition and all are still alive and growing
These double knock out roses look really nice. would it be better to plant them now or to wait until the spring?
Spring and fall are generally the best times to plant. The rule of thumb is to plant after the threat of frost has passed in your area in spring or at least six weeks before the first hard frost of fall in your area. You can learn more about frost dates here: https://blog.greatgardenplants.com/frost-dates-explained-gardening-for-each-zone-in-spring-fall/
Will they grow in Florida (Sarasota)?
Double Knock Out® Rose is rated for USDA zones 5-9. Your zone is determined by your zip code and if you need help determining your zone, you can use our zone finder tool here:
https://www.greatgardenplants.com/pages/shopping-by-zone
Are they deer resistant
You’d think a plant covered in thorns would be deer resistant, but alas, this is not the case. Deer and rabbits both love to eat roses. If deer or rabbits are a problem in your area, you'll want to take steps to protect the roses.
Knockouts can become tall, do they need be cut back to about 2-3 feet in fall before winter? I’m zone 8-9
Double Knock Out® Rose reaches 4 feet tall at maturity so you can easily prune it back by a foot to keep it a more desirable height. Just make sure to wait until growth breaks in early spring before doing any pruning.
How tall are the rose bushes?
Hi there! Plant size varies widely depending on the variety that you purchase and the time of year. Double Knock Out® Rose will reach a mature size of 4 feet tall and wide.