double knockout rose in bloom |Spotswood Greenery

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Double Knock Out® Rose

Knock Out® Roses

Rosa 'Radtko' Double Knock Out® PP16202

Own Root Rose

size #2 Pot

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Price

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Pairs well with

Double Knock Out® Rose gives you a classic full rose flower with the toughness of the original. Rosa 'Radtko' came from the same cross that produced Knock Out, and it carries double cherry-red blooms that look like a traditional rose while resisting black spot just as well. It grows 3 to 4 feet tall and wide in full sun, hardy from Zone 5 through Zone 11.

Bloom runs continuously from spring to frost, and the flowers carry a sweet fruity scent that the singles do not have.

Knock Out roses were bred for disease resistance first. They hold clean foliage through humid summers with no fungicide, bloom continuously without deadheading, and need nothing beyond a hard cutback in early spring. That combination is why they took over the landscape trade.

New growth emerges with a purple cast before maturing to deep green, and the foliage takes on purple tones again in fall. It is slightly more winter hardy than the original. Cut back by about a third in early spring. Shipped on its own roots.

Size at Maturity

Height 2'- 3' Spread 3'- 4'

Growing Zone

USDA Hardiness Zones 4-8

Lowest Temperatures -30°F to -20°F

Light Requirements

Full sun - more than 6 hours of direct sun per day

Wildlife Benefits

Supports Bees
Attracts Butterflies

Special Conditions

Disease Resistant

Reblooming

Seasons of Interest

Spring
Summer
Fall

How to Plant

Give your new plant the best start possible. Click here for general planting instructions.

Grow With Confidence

We stand behind every plant we ship. Click here to view our warranty.

Easy to find what I was looking

Easy to find what I was looking for

Thank you so

Thank you so much!

Found exactly what I was looking

Found exactly what I was looking for

I ordered 2 native plants both arrived on time and with one exception- not under control of

I ordered 2 native plants both arrived on time and with one exception- not under control of vendor- as expected- I’ll check how to deal with this one plant abs and hope it’s resolved and resilient- decent value otherwise and keep it native. -
W R Leigh in NC

Great

Great service

So far

So far, healthy plant.

Received two ornamental flowering almonds

Received two ornamental flowering almonds. They were bigger than expected beautiful lush green and I was totally impressed. I wanted to get a heads up with planting them this August and get them growing so I could enjoy them in the spring. Thank you so much. Absolutely stunning.

I am so happy I found this shop!

I am so happy I found this shop! Every step of the buying experience has been smooth from the very first order. I am a repeat customer and will definitely continue to support this business!

I've received four roses from Spotswood Greenery and each won has been a big

I've received four roses from Spotswood Greenery and each won has been a big, healthy, beautiful plant. Shipping is super quick and prices are reasonable. I'm super satisfied and will be ordering many more!

Exceptional Roses

EXCEPTIONAL ROSES!

Recently, I received a #3 pot Wollerton Old Hall Rose, a #3 Alnwick Rose, and a #2 pot Sweet Mademoiselle rose from Spotswood Greenery. I could not be more pleased and grateful. All plants are in perfect condition. Each is supported by incredibly healthy roots, several Charles Atlas-like stems, and beautiful foliage. Packaging was very secure. Clearly done with care! Shipping was quite prompt. Now, pricing! I've grown roses for 40 of my 67 years. In that time, it's easy for me to say that Spotswood has exceeded every other source without question. I found three roses in stock I had wanted! The quality is champion! The prices are very good, excellent when one buys at the free shipping level! Worth every penny! Thank you, every one, on the Spotswood Greenery Team!
Brian Lowry
Scottsburg, Indiana

Great selection

Great selection, good prices and fast servuce

Great!

Great!

nice to talk to a person who answers the phone

nice to talk to a person who answers the phone and cares and is american

I just received my hypericum red fame and was

I just received my hypericum red fame and was amazed how big it was and just as pretty as my established one I have had a couple years. So happy because the last one I ordered online from another nursery came as a little stub compared to this! I will definitely use Spotswood Greenery for now on!

Wonderful

Wonderful

Quick shipping

Bought a David Austin rose; it arrived quickly however it had some damage upon arrival. Ended up pruning and defoliating a good bit to get rid of the broken cane and pest damage, but I expect it to be a beautiful bush down the road.

Lovely plants

Lovely plants, get with your shipper.

Comfortable ordering process

The information and accuracy of the description of the ordered plants was great. The ability to search for specific plants was nice. Could search for terms not pre-defined and still came up with relevant specimens.

The online ordering process went smoothly.

Wonderful nursery will buy from

Wonderful nursery will buy from again!!!

I ordered ~8 David Austin roses from here

I ordered ~8 David Austin roses from here. They were equal in quality to the ones at my local nurseries (better than some), and $10 cheaper. Established roots, full of buds that have become gorgeous blooms. Will absolutely order from Spotswood again!

Fast shipping and great

Fast shipping and great, full plants. I prefer shipping here vs David Austin directly because of how big and healthy roses arrive.

Beautiful shrub I’ve been looking for and found

Beautiful shrub I’ve been looking for and found it here very pleased

Superb source for DA roses

Superb source for DA roses. Very full and healthy plants. Very secure shipping. Most highly recommended!

Lovely

Lovely choices!

Speedy detailed and efficient

Speedy detailed and efficient.

I would love to share my experience

I would love to share my experience. My Eden’s were packed so carefully and arrived in perfect condition.Shipped quickly and are just beautiful.

This rose bush is beautiful full of blooms this is the first time I received anything like it

This rose bush is beautiful full of blooms this is the first time I received anything like it, I will definitely buy fro this nursery again ☺️

Perfectly packaged roses for shipping

Perfectly packaged roses for shipping. Arrived healthy & thriving even after a 2 day weather delay!Extremely happy with my purchase from Spotswood💜

Buy Again

All beautiful healthy plants that arrived quickly and stable.

Planting and Care Guide

Planting Tips

Plant in well-drained soil. Dig a hole twice as wide as the root ball. Space 3–4 feet apart. Water thoroughly after planting and mulch 2–3 inches deep, keeping mulch away from the canes.

Care Tips

Plant in full sun, at least 6 hours a day. More sun gives more flowers and fewer leaf problems.
Plant in well-drained soil with compost worked in.
Water deeply once a week through the first summer and in dry spells after that, at the base of the plant and in the morning.
Mulch 2 to 3 inches deep, keeping it back from the canes.
Feed in spring as growth starts with a rose or balanced slow-release fertilizer. Feed again lightly after the first bloom, and stop by midsummer.
Most of these rebloom without deadheading. Trimming off spent clusters keeps the plant tidy.
Prune in early spring as the buds swell. Remove dead wood, then cut the whole plant back by about a third.
Groundcover types can be sheared back in early spring.
Do not prune in fall; wait until spring.
Black spot can show up in humid summers. Space plants for air movement and rake up fallen leaves.
Plants grown on their own roots regrow true to type if a hard winter kills them back.
Japanese beetles can strip flowers and leaves in midsummer. Hand-pick them into soapy water early in the day.
Rose rosette disease causes red, bristly, distorted new shoots. Remove and destroy an affected plant, roots and all; it does not recover.