Rose Double Knock Out®
Rose Double Knock Out®

Rose Double Knock Out®

Out Of Stock

Shipment begins in Fall 2019

SKU: F66931
1 for $29.00
12 Reviews
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Quick Facts
Common Name: Shrub Rose
Hardiness Zone: 5-9S/W Exposure: Sun to Part Shade
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Blooms In: Jun-Sep
Height: 3-4' Spacing: 4'
Read our Growing Guide Ships as: ONE GALLON POT
Fragrance: Yes
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Product Details

Product Details

The cherry-red double blooms of Rosa Double Knock Out® keep coming until hard frost, and its new growth is a stunning burgundy red. Aptly named, this popular successor to Knock Out® is fuller and more floriferous, producing clusters of 2½″ incandescent blooms with 18–25 petals. A hardy variety naturally resistant to black spot and other diseases and pests. Own-root. 'Radtko' (PP 16,202).

Our rugged and heavy-blooming Shrub Roses are part of a new category called 'Landscape Roses.' The term means each of these plants is of such indomitable character it will thrive virtually unattended. Use multiples of the same variety to create superb hedges, ground covers, or foundation plantings; or give individual plants the prominent place they deserve in a mixed border.

For information on Rose care, click on Growing Guide.

Tip: We use Organic Gem® as a foliar feed on Rose bushes in our trial garden and find plants are healthier and perform better throughout the season.

Shipping

Shipping

HOW PLANTS ARE SHIPPED

The size of the plants we ship has been selected to reduce the shock of transplanting. For some, this means a large, bareroot crown. Others cannot travel bareroot or transplant best if grown in containers. We ship these perennials and annuals in 1 pint pots, except as noted. We must point out that many perennials will not bloom the first year after planting, but will the following year, amply rewarding your patience. We ship bulbs as dormant, bare bulbs, sometimes with some wood shavings or moss. Shrubs, Roses, vines, and other woody plants may be shipped bareroot or in pots. The size of the pot is noted in the quick facts for each item.

WHEN WE SHIP

We ship our bulbs and plants at the right time for planting in your area, except as noted, with orders dispatched on a first-come, first-served basis by climate zone. Estimated dates for shipping are indicated in the Shipping Details box for each item. Please refer to the Shipping Details box to determine the earliest shipping time. Unless you specify otherwise, fertilizers, tools, and other non-plant items are shipped with your plants or bulbs. Please supply a street address for delivery. Kindly contact us with two weeks notice, if you'll be away at expected time of delivery.

OUR GUARANTEE

We guarantee to ship plants that are in prime condition for growing. If your order is damaged or fails to meet your expectations, we will cheerfully replace or refund it. Please contact our Customer Service Department at 1-800-503-9624 or email us at [email protected]. Please include your order number or customer number when contacting us.

Reviews

Reviews

Average Customer Rating: (12 Reviews) Write a Review

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Small bushes

A viewer from New York City

The roses were packaged exceptionally well. Upon removal of the careful packaging, I was rather disappointed with how small each bush was and how slim the main stems were. The tallest bush was just 10" high from base to top and the thickest stem slimmer than a drinking straw. Our local store has these exact same roses for the same price and they are bigger and more vigorous in size and girth. They've all been planted in a very sunny spot and I'm still hopeful that they grow as lovely as your pictures in the next coming years.

7 of 7 people found this review helpful. Do you? yes no  Certified buyer


Grows like a weed - in a great way!

A viewer from Washington DC

I have to review this rose because I have the worst luck with pretty delicate tea roses - I try and fail, in DC humidity the fungus/mold and bugs get to everything, and the heat makes it hard to keep your roses sufficiently watered. Except for this one! I planted it in the alley behind my house in an existing planter - I do almost nothing to help it, and wouldn't you know the thing grows like MAD! Healthy, laden with flowers all summer long, I have to hack it back in winter just to keep it under control. BEST ROSE EVER! I've had it 4 years I think? Amazing.

3 of 3 people found this review helpful. Do you? yes no  Certified buyer


Beautiful roses!

Heather from Boulder, CO (zone 5)

I planted 3 red knock out roses this past May. They started flowering immediately and haven't shown signs of slowing yet! They are a bright pop off color. I love them! Highly recommended!

32 of 32 people found this review helpful. Do you? yes no


Pleased as Punch!

Carol from Elk Grove Village, IL

This rose is worry free. It's planted on the south side of the house so it gets plenty of sun. This is the first year and its bloomed three times already. I'm very happy with it.

6 of 7 people found this review helpful. Do you? yes no  Certified buyer


Beautiful and healthy plants every time.

Poonana from central Wisconsin

product was shipped as promised making it convenient to plant in season

1 of 2 people found this review helpful. Do you? yes no  Certified buyer

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Growing guide

Growing guide
Print Grow Guide

Today's Roses are easier to grow than you might expect.

  • The basic needs for Roses include plenty of direct sun and fertile, well-drained soil.
  • Roses tolerate a range of soil types (from sand to clay), as long as a little care is taken to prepare the soil at planting time.

We offer both own-root and grafted Roses.

  • Own-root Roses are plants grown from cuttings. They have their own root systems and remain true to the original varieties.
  • Grafted Roses are plants that have vigorous rootstocks fused to the top parts of other Roses that are valued for their flowers.

Planting Bareroot Roses: 

  • Before planting a bareroot Rose, remove and discard the packing material and soak the roots for a few hours.
  • Dig a planting hole that allows sufficient room for the depth and spread of the roots.
  • Add organic matter—such as compost or aged manure—and mix this into the soil dug from the hole.
  • Set the plant in the hole so that the top of the graft, or the crown of own-root Roses (the point where the stems of the plant meet the roots), is 3" below soil level in the North, and at the same level or 1" above where winters are mild.

  • Push the mix of soil and organic matter back into the hole, tamping firmly as you go. Water thoroughly.
  • Add a generous layer of organic mulch (compost or aged manure is best) to help keep the soil evenly moist.
  • Water thoroughly once every 2 weeks if rainfall is scarce throughout the growing season and into fall.

Planting Potted Roses:

  • Check the moisture of the potting mix in the container and, if dry, water thoroughly.
  • Dig a hole wide enough and just deep enough for the root ball.
  • Add organic matter—such as compost or aged manure—and mix this into the soil dug from the hole.
  • Remove the plant from the container and gently break up the sides of the root ball with your thumbs and carefully untangle any roots circling at the bottom.
  • Set the root ball in the hole so that the top of the root ball is level with the surface of the surrounding soil.

  • Push the mix of soil and organic matter back into the hole, tamping firmly as you go. Water thoroughly.
  • Add a generous layer of organic mulch (compost or aged manure is best) to help keep the soil evenly moist.
  • Water thoroughly once a week if rainfall is scarce during the growing season and throughout fall.

Light: Roses grow best where they receive at least 6 hours of direct sun per day.

Watering: We recommend watering in the morning if possible so that the foliage doesn’t remain wet into the evening. If the weather is dry, water thoroughly every 2 weeks.

Fertilizer: Roses grow more vigorously, bloom more prolifically, and show greater resistance to diseases if fertilized during the growing season.

  • For best results, add a layer of compost or aged manure in early spring around the base of the plant. After the first wave of bloom, apply a bloom-boosting fertilizer (15-30-15).
  • For organic gardeners, we recommend adding a layer of compost or aged manure in early spring and applying an organic fertilizer after the first wave of bloom.

Pests & Diseases: The Roses we offer are selected for their vigor and their resistance to pests and diseases. 

  • Some Roses are prone to fungus problems (such as black spot) in hot, humid areas. Cleaning up old foliage from the base of the plant is important for disease control.
  • We recommend the use of environmentally-friendly horticultural oil and insect sprays listed by the Organic Materials Review Institute (OMRI).
  • Japanese beetles may be handpicked or a systemic pesticide may be used. In spring, check for Rose slugs (sawfly larvae that appear as tiny, green caterpillars and skeletonize Rose foliage) and physically destroy them or spray with superfine horticultural oil.

Pruning: Prune Roses to remove deadwood, to control or direct growth, and to promote flowering.

  • Wait until growth breaks from the canes in early to mid-spring before pruning.
  • To train climbers in early spring, trim thinner side shoots from the base of the main branches. Attach new stems to their supports throughout the growing season.
  • If the Rose bush has become too tall, the stems may be cut back by one-third to one-half in early spring or after the first wave of blooms.
  • With the exception of the rugosas, which produce attractive hips (fruits), remove the spent flowers of reblooming Roses to promote more bloom.

Transplanting: Roses may be moved in early spring when dormant.

End-of-Season Care: In our experience, the best way to get Roses through winter is to choose plants adapted to your climate zone.

  • Mound 2 shovelfuls of bark mulch around the base of the plant before the start of winter. This added layer of protection is especially important for grafted Roses.

 

Videos

Videos
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