Light Needs
Mature Height
Mature Spread
Growing Zones
Hydrangea macrophylla ‘COF-HM3’, commonly called Rock 'n Roll Hydrangea, has large mophead blooms. The large flower clusters come in bright pink, purple and dreamy blue, and stand out against a backdrop of luscious green foliage. This hydrangea reblooms in late summer, and its sturdy stems ensure that the blooms will never flop or droop. These low maintenance beauties are worth the space in your garden!
Rock 'n Roll has a mounding, upright, bushy shape. It reaches 4 - 5 high and as wide at maturity. This rock star is extremely cold-hardy down to -30° F. It prefers morning sun and afternoon shade and grows best in moist soil. Use these star performers in a privacy screen, pollinator garden, or cut-flower bed. Rock 'n Roll attracts butterflies and other pollinators, while deer don’t usually bother with it.
Rock 'n Roll™ Hydrangea Care
Rock 'n Roll Hydrangea prefers part-sun exposure and moist soil conditions. It can burn in the hot afternoon sun and will need regular water during the summer. Like most hydrangeas, Rock 'n Roll grows best in rich soil with plenty of organic matter. The pH of your soil will determine flower color: acidic soil brings out blue hues, alkaline soil leads to pink, and neutral soil promotes purple tones. Cover the root zone with a heap of mulch to reduce water evaporation and nurture the soil.
This mophead hydrangea blooms on old and new wood. Prune in early spring before the first flush of blooms. Cut back dead and damaged branches, and shape to control size.
Rock 'n Roll™ Hydrangea Spacing
Space these hydrangeas 4 feet apart, center on center, if growing as a tight hedge. For foundation planting, site shrubs at least 6 feet from your home with plenty of clearance from overhead eaves to ensure plantings will not get too dry. Hydrangeas will develop a deep root system and should only be grown in containers temporarily.
Rock 'n Roll™ Hydrangea Information
| USDA Hardiness Zones: 5 - 8 |
| Plant Type: Bushes |
| Light Exposure: Partial Sun to Full Sun |
| Mature Height: 4 - 5 Feet |
| Mature Spread: 4 - 5 Feet |
| Spacing: 4 - 5 Feet |
| Habit: Upright |
| Flower Color(s): Blue, Pink, Purple |
| Flower Description: Multi-Color |
| Bloom Period: Summer |
| Foliage Type: Deciduous |
| Foliage Color(s): Green |
| Foliage Description: |
| Seasonal Interest: Summer Flowering |
| Watering: Average |
| Resists: Disease, Pests & Insects |
| Tolerates: Drought |
| Attracts: N/A |
| Container Role: |
| Uses: Borders, Wildlife Gardens |
| Features: Cut Flowers, Low Maintenance, Continuous Blooming or Rebloomer |
| Brand: |
| Common Name: Rock 'n Roll™ Hydrangea |
| Other Name(s): |
| Scientific Name: HYDRANGEA M `ROCK-N-ROLL` |
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.
Starting January 1, 2025 all bushes, perennials & trees purchased 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 31th |
| 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.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: Idaho, AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!