Double Knock Out® Rose
Double Knock Out® Rose
Double Knock Out® Rose: Bold Color, Built for Real Life
The Double Knock Out® Rose delivers rich, layered red blooms that keep coming from spring until frost.
It’s designed for real-life landscapes—strong, reliable, and consistently full—so you get the look of a classic rose without the usual maintenance.
This is one of those plants that fills in fast and stays finished. Whether used in hedges, foundation plantings, or patio containers, it brings structure, color, and season-long performance without needing constant attention.
What Makes the Double Knock Out® Rose Special?
- Double Blooms: Layered red flowers create a fuller, more classic rose look.
- Continuous Color: Blooms from spring through the first frost.
- Low Maintenance: No regular deadheading required and minimal pruning to keep it looking clean.
- Disease Resistant: Strong resistance to common rose issues like black spot.
Easy to Grow, Easy to Use
This rose thrives in full sun but is more forgiving than traditional varieties, making it easier to place throughout your landscape.
It performs well in both in-ground plantings and containers, giving you flexibility without sacrificing performance.
Where It Shines
- Creating flowering hedges with consistent color and structure.
- Filling in foundation plantings with a clean, finished look.
- Adding reliable color to patios, porches, and entryways.
A note from Rachel
This is one I recommend when you want roses without the extra work.
It fills in quickly, stays consistent, and you don’t have to think about it much. It just does what you want it to do.
Add it to your space
Full, reliable, and always in bloom.
Plant Details
| Botanical Name | Rosa 'Radtko' |
| Category | Flowering Shrubs |
| Subcategory | Roses |
| Brand | Knock Out® |
| Growing Zone | 5-10 outdoors |
| Sunlight | Full-Part Sun |
| Mature Height | 3-4 ft. |
| Mature Width | 3-4 ft. |
| Growth Rate | Moderate |
| Bloom Time | Spring to Fall |
⚠️ Not available in: AK, AZ, CA, HI, OR, PR
📋 Planting Directions
Planting Double Knock Out® Rose
To plant Double Knock Out® Rose, follow these steps:
- Choose a location with full sun and well-draining soil.
- Amend the soil with compost to improve drainage and fertility.
- Dig a hole twice as wide and the same depth as the root ball.
- Remove the plant from its container and gently loosen the roots.
- Place the plant in the hole, keeping it level with the surrounding soil.
- Backfill with soil, pressing lightly to remove air pockets.
- Water thoroughly to establish strong root contact.
- Apply mulch to retain moisture and reduce weeds.
Care and Maintenance
For ongoing care of your Double Knock Out® Rose:
- Water regularly during establishment, then reduce as the plant becomes drought-tolerant.
- Fertilize in early spring to support healthy growth and continuous blooms.
- Prune lightly in early spring to maintain shape and size.
- Monitor occasionally, though this variety is highly disease resistant.
This plant is grown for its ornamental blooms, so pollination and harvesting are not applicable.
Adjust care as needed based on your environment and growing conditions.
❓ FAQs
FAQs for the Double Knock Out® Roses
1. How do I plant Double Knock Out® Roses?
- Choose the Right Spot: Select a location with at least 6-8 hours of sunlight daily and well-draining soil.
- Prepare the Soil: Amend the soil with compost or well-rotted manure to improve fertility and drainage.
- Dig the Hole: Make the hole twice as wide and the same depth as the root ball of your rose.
- Plant the Rose: Remove the rose from its container. Loosen the roots gently, place it in the hole, ensuring the graft union (swollen part where the stem meets the roots) is just above soil level. Backfill with soil, pressing down firmly.
- Water Thoroughly: After planting, water the rose deeply to settle the soil around the roots.
2. How should I water my Double Knock Out® Roses?
- Regular Watering: Water deeply once a week, allowing the soil to dry out between waterings. Avoid overhead watering to prevent leaf diseases.
- Mulch: Apply a 2-3 inch layer of mulch around the base to retain moisture and reduce weeds.
3. What is the best way to fertilize Double Knock Out® Roses?
Feed your roses in early spring with a balanced, slow-release fertilizer designed for roses. Reapply according to the product's instructions, usually every 4-6 weeks through the end of summer. Avoid fertilizing late in the season to prevent new growth that could be damaged by early frosts.
4. How do I encourage good pollination in Double Knock Out® Roses?
Double Knock Out® Roses are self-pollinating, meaning they don't require external pollinators to produce blooms. However, attracting bees and other pollinators can help your garden as a whole. Planting companion plants that attract pollinators, such as lavender or salvia, nearby can encourage a healthy garden ecosystem.
5. When and how should I harvest Double Knock Out® Roses?
- Timing: Harvest roses early in the morning when their moisture content is highest.
- Method: Use sharp, clean pruning shears. Cut the stem at a 45-degree angle, about ¼ inch above a leaf node or five-leaflet leaf, choosing stems that have buds starting to open.
- Use: Place cut roses in water immediately to prolong their vase life. Change the water daily and recut the stems every few days.