Growing Zones: 5-10 outdoors(hardy down to -10℉)
This plant may not thrive in your area
- Mature Height:
- 3-4 ft.
- Mature Width:
- 3-4 ft.
- Growth Rate:
- Botanical Name:
- Rosa 'Radtko'
- Does Not Ship To:
Double the Petals on Double the Roses
Why Double Knock Out® Roses?
Boasting one of the longest blooming periods available, from early summer to late fall, the Double Knock Out® Rose gives you all the amazing characteristics of the original Knock Out® Rose - just with more petals and even better disease resistance.
Even better? Not only is this cultivar more resistant to black spot, rust, and mildew, but it's also more resistant to insects. That means the Double Knock Out® is virtually maintenance-free, especially since it grows thickly without pruning. Plus, it thrives in containers or in the ground. This improved variety will even grow in the shade, giving you more areas to plant.
Why Fast-Growing-Trees.com is Better
With plenty of blooms to spare, you'll enjoy fresh cut roses in your home from spring until fall. And depending on your soil conditions, your blooms can range from dark to light red, offering even more versatility. And we prune your Knock Out® Roses before we ship them to give you an explosion of growth. Because of our hard work at the nursery and tried-and-true shipping process, you get a greater chance of success at home.
Elevate the elegance of your garden with the effortless Double Knock Outs!
Customer Reviews & Photos
- rose bushes
The roses were packaged very well arrive when said it and there were no damage. I've planted them a couple days after I received them and so far so good.
The knockout roses were delivered in a timely manner and had been sufficiently packaged for safe delivery, very minimal breakage on any of the eight bushes. I will definitely use FastGrowingTrees again!
Great. Growing and blooming
My number one complaint with FGT would primarily be the packaging. When I received my plant the pot was very lose and had been moving around a lot. Most of the soil was out of the pot and free in the box where it spilled over my wife’s carpet. The shipper shares a big part of the responsibility for this part. Several of the limbs were broken but more distressing was the fact that fully one third of the bush (one of three stalk’s) looked completely dead with zero leaves. The bush itself was very wilted. I immediately added new potting soil and watered it well and placed it in a protected partially sunny window. The good parts of the plant are responding well but the dead one third is not responding at all yet and I don’t expect it to. I did buy the insurance but I believe it has to fully die and not just be just “unsatisfied” to claim on that. For a 50th Anniversary gift this plant will never have the nice full body or well rounded shape that I wanted. I had planned to transplant it into my wife’s favorite pot but at this point I will buy another plant for that purpose. “IF” I buy another Double Knockout rose from FGT then I will try the two year plant. I will say that my communication with the company has been very good so far and I’m sure that the large majority of their transactions are very satisfactory. My plant looks as though it may have been a nice little plant at some time. There is no reason to not buy from FGT. My rating is just about my experience only.
I redid my driveway flower bed I ordered three double knock out Roses from Fast Growing Trees, com I'M very pleased with these plants I have bloom on the already.
Planting & Care
1. Planting: Choose a well-drained site in full to partial sun (4 to 8 hours of sunlight per day). If you choose partial sun, make sure your plant receives at least 6 hours of direct sunlight each day (afternoon shade is better than morning shade).
Start by digging a hole twice as wide and twice as deep as the root ball. Backfill the soil until you have a hole the same size or slightly larger than the container the rose is in. Plant the rose at the same depth as it is in the container. Space Knock Out Roses 3 feet apart. Mulch the planting site to retain soil moisture and keep competing growth from coming up around the rose bush.
2. Watering: Keep Knock Out Roses moist at all times. Water around the roots rather than overhead (or showering). Generally, this means watering about once or twice weekly, or more often in dry conditions.
3. Fertilizing: Fertilize with an organic rose fertilizer once a month.
4. Pruning: Prune every spring, all the way back to 12 inches off the ground, after it is established. When you do prune, sterilize your sharp pruning shears with hot water or rubbing alcohol. This guarantees a cleaner, healthier cut. Always prune at an angle and not straight across.
Most items ship the next business day unless otherwise noted
Estimated Shipping Time: Most orders ship immediately, however some orders may ship in 1-2 business days (we do not ship on the weekends) from date of purchase. As noted on the website, some items are seasonal, and may only ship in spring or fall. Once your order is shipped, you'll receive an email with a tracking number.
|Amount of Order||Shipping Charge|
|Less than $15||$11.95|
You can still order, but due to cold weather, we have delayed shipping to the areas shaded on the map below. We want your new plant to thrive right out of the box, so we will wait on shipping your order until the weather is ideal. This includes anyone in
Growing Zones 3 - 6. If you are unsure of your growing zone, visit our
Growing Zone Finder.
Some plants are not available for immediate shipment, and delayed delivery is noted.
We will resume normal shipping in the Spring. Please see the table below for your approximate ship date.
|Growing Zone||Shipping Resumes|
|Zones 3 & 4||Week of May 4th|
|Zone 5||Week of April 13th|
|Zone 6||Week of March 30th|
|Zones 7 - 11||Ships Now!|