Light Needs
Mature Height
Mature Spread
Growing Zones
For height and visual impact, you will be hard pressed to beat the Knock Out® Double Red Rose Tree. Growing to a height of around 5 feet, this Rosa 'Radtko' forms a lush canopy of green foliage and ornate double flowers from late spring into the fall. This rose tree is easy to grow and bound to draw interest wherever you decide to grow it.
The clear single “trunk” and large rounded canopy make the Knock Out® Double Red Rose Tree ideal for the back of a border, large container or accent planting. It has great resistance against black spot and is considered winter hardy down to USDA zone 5. The showy blooms up to 3 inches across are sure to make a big statement on this unique tree form.
Knock Out® Double Red Rose Tree Care
The Knock Out® Double Red Rose Tree is happy when it is planted in full to partial sun. As with other roses, it favors fertile, moist and well-drained soil that is rich in organic matter. Water deeply upon planting and from then on to keep the soil moist. Fertilize with a specific rose feed as directed to prolong blooming and maintain plant health.
Deadheading is not strictly required but can lead to a tidier look. Prune in late spring back to an outward-facing bud, and remove any dead or diseased wood. Rose trees grown in a container will need more frequent irrigation, especially during the summer months to keep the soil moist.
Knock Out® Double Red Rose Tree Spacing
The Knock Out® Double Red Rose Tree grows to 4 to 5 feet tall with a canopy 3 to 4 feet wide. A plant spacing of 4 to 5 feet apart, center on center, will allow for a well-defined canopy.
Knock Out® Double Red Rose Tree Information
| USDA Hardiness Zones: 5 - 10 |
| Plant Type: Perennials |
| Light Exposure: Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight) |
| Mature Height: 4 - 5 Feet |
| Mature Spread: 3 - 4 Feet |
| Spacing: 3 - 4 Feet |
| Habit: Spreading, Upright |
| Flower Color(s): Red |
| Flower Description: |
| Bloom Period: Late spring until the first frost |
| Foliage Type: Deciduous |
| Foliage Color(s): Green |
| Foliage Description: |
| Seasonal Interest: Spring Flowering |
| Watering: Average |
| Resists: Disease |
| Tolerates: Heat, Drought |
| Attracts: Bees, Butterflies |
| Container Role: |
| Uses: Combinations, Containers, Specimen or Focal Point |
| Features: Attracts Pollinators, Cut Flowers, Fragrant, Low Maintenance |
| Brand: |
| Common Name: Knock Out® Double Red Rose Tree |
| Other Name(s): |
| Scientific Name: Rosa 'Radtko' |
- SKU:
- 123PLA1599-npn
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
All bushes, perennials & trees come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
| Growing Zone | Estimated Ship Week |
|---|---|
| Zone 10 | March 24th |
| Zone 9 | March 31st |
| Zone 8 | April 7th |
| Zone 7 | April 14th |
| Zone 6b | April 21st |
| Zone 6a | April 28th |
| Zone 5b | May 5th |
| Zone 5a | May 12th |
| Zone 4 | May 19th |
| Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.