Rock-N-Roll™ Hydrangea

Hydrangea macrophylla 'COF HM3'

$84⁹⁹

In Stock
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Plant Size

#3 Container

Product variants

Plant Sentry™

Delivery and Shipping

Understanding Plant Options

Nature Hills offers plants in two main formats:

Container Plants: Grown in pots with soil, sized by container volume and plant age
Bare Root Plants: Dormant plants without soil, sized by height measurements

Container Plant Sizes

Container sizes indicate plant age and growing capacity rather than liquid volume equivalents. Our containers follow industry-standard nursery "trade gallon" specifications, which differ from standard liquid gallon measurements.

Young Plants (6 months to 18 months old)

Container Size	Actual Volume	Metric Equivalent
2" x 2" x 3"	0.18 - 0.21 dry quarts	0.20 - 0.23 dry liters
4" Container	0.31 - 0.87 dry quarts	0.35 - 0.96 dry liters
4.5" Container	0.65 dry quarts	0.72 dry liters
6" Container	1.4 dry quarts	1.59 dry liters
1 Quart	1 dry quart	1.1 dry liters
5.5" Container	1.89 dry quarts	2.08 dry liters

Established Plants (18 months to 2.5 years old)

Container Size	Actual Volume	Metric Equivalent
2 Quart	2 dry quarts	2.2 dry liters
#1 Container	2.26 - 3.73 dry quarts	2.49 - 4.11 dry liters
5" x 5" x 12"	3.5 - 4.3 dry quarts	3.85 - 4.74 dry liters

Mature Plants (2-4 years old)

Container Size	Actual Volume	Metric Equivalent
#2 Container	1.19 - 1.76 dry gallons	5.24 - 7.75 dry liters
#3 Container	2.15 - 2.76 dry gallons	8.14 - 12.16 dry liters

Large Plants (3-5 years old)

Container Size	Actual Volume	Metric Equivalent
#5 Container	2.92 - 4.62 dry gallons	12.86 - 20.35 dry liters
#6 Container	5.25 - 6.01 dry gallons	23.12 - 26.42 dry liters
#7 Container	5.98 - 6.53 dry gallons	26.34 - 28.76 dry liters

Bare Root Plants

Bare root plants are sold by height from the root system to the top of the plant. Plants may exceed minimum height requirements.

Common Sizes:

Trees: 1 foot, 2 feet, 3 feet, 4 feet, 5 feet, 6 feet
Shrubs & Perennials: 1 foot, 18 inches, 2 feet

Important Notes

Container Volume Specifications

Trade Gallon Standard: Our containers follow industry-standard "trade gallon" specifications established by the American National Standards Institute (ANSI Z60.1) for nursery stock
Volume Variations: Actual soil volume may vary due to plant root systems and growing medium settlement
Age Indicators: Container size primarily indicates plant age and maturity rather than liquid volume equivalents

Growing Conditions

Plant size can vary based on variety and growing conditions
Container size helps indicate plant maturity and establishment level
Larger containers generally mean more established root systems and faster landscape establishment

Seasonal Availability

Bare root plants are available seasonally when dormant
Container plants are available throughout the growing season
Specific varieties may have limited availability in certain sizes

Questions?

For questions about specific plant sizes or availability, please contact our plant experts who can help you choose the right size for your landscape needs.

Plant Highlights

Rock-N-Roll™ Hydrangea highlights at a glance!

Specifications

Brand

Nature Hills' Choice
Botanical Name

Hydrangea macrophylla 'COF HM3'
Growing Zones

5-8
Mature Height

4 - 5 feet
Mature Spread

4 - 5 feet
Sun Exposure

Full Sun, Partial Shade
Moisture

Moderate
Soil

Well Drained
Growth Rate

Medium
Flower Color

Pink, Blue or Lavender
Pollinator Friendly

Yes
Pruning Time

Early Spring
Bloom Period

Summer, Fall

Growing Zones 5-8

Find Your Growing Zone!

Rocking the Blooms all Summer iBloom® Rock-N-Roll™ Hydrangea!

Large Mophead Blooms
Vibrant Deep Pink or Blue and Purple
Flower Color Varies Depending on Soil pH
Vigorous Rebloomer on New Wood
Easy Care & Low Maintenance
Long-Lasting Flower Heads
Butterflies and Beneficial Pollinators
Wildlife Habitat & Shelterbelts
Cold Hardy
Lush Bushy Deep-Green Foliage
Fast-Growing Sturdy Stems
Dried and Fresh Floral Arrangements

Hydrangea conjure images of traditional plantings of stately shrubs, sedately lining quiet picket fences. Time to turn up the volume with the iBloom® Rock-N-Roll™ Hydrangea!

These are fast-growing shrubs and their long-bloom time makes Rock-N-Roll™ Hydrangea (Hydrangea macrophylla 'COF HM3') an amazing garden addition.

Concert-ready flower clusters in vibrant jewel tones are highlighted by equally saturated deep-green foliage. This gorgeous shrub grows in a bushy, upright form that is naturally rounded and mid-sized presence in the garden.

The clusters of blossoms are either deep pink, purple or vibrant blue, depending on your soil's pH. Pollinators adore this Mophead Hydrangea as much as you will!

The showy blooms last all summer and in autumn, and the blooms dry to tan on the shrub and create fantastic winter interest. The sturdy stems make excellent cut flowers for dried or fresh décor!

How to Use Rock-N-Roll™ Hydrangea In The Landscape

Bigleaf Hydrangea are reliable flowering shrubs with bloom color boosted by an amp! The bright colors and sizable form create amazing hedges for privacy we're sure your neighbors won't mind blaring in your yard!

Boost curb appeal with a row of these rock stars screening your property from the street, or a row in front of your home as a foundation planting!

The branching is dense enough for Rock-N-Roll™ to be utilized for ornamental additions to shelterbelts and windbreaks while pulling double duty as a fantastic backdrop for your garden beds and borders!

An excellent specimen or accent plant, Rock-N-Roll™ is a rounded anchor plant and just the boost your garden needs to wake up your sleepy cottage border.

Cut flower beds and pollinator gardens benefit from vigorous, reblooming flower buds that keep pumping out enough blooms to keep your vases and pollinators full!

Low-maintenance, you'll have little work to keep these hardy shrubs looking amazing anywhere you plant one. So heavy in bloom that Rock-N-Roll™ Hydrangea needs every sturdy stem.

#ProPlantTips For Care

If you have acidic soil your iBloom® Rock-N-Roll™ will take on blue shades, and if you have alkaline soil, you'll get to see bright pink! Neutral soil and you'll see vibrant purples! Whatever color you choose, Rock-N-Roll™ will be vibrant and showy!

Tolerating near full sun only in the cooler zones, Hydrangea really does its best with morning sun and afternoon shade. Partial sun and dappled shade are favorite locations for these, but for the strongest stems, they do need at least 4 hours of sun.

Provide Rock-N-Roll™ Hydrangea with adequately moist soil, especially during the summer months for the best flower size and color! Hydrangea loves rich soil with ample organic matter. Consistent moisture is a must during the hot summer months.

Hardy growing zones 5 through 8, soil type for Hydrangea is any type, from clay to sand to loam, just as long it is well-drained. A generous layer of mulch helps retain soil moisture as well as insulate the root system from both heat and chill.

Prune in early spring before new growth appears, but only to remove any winter dieback, flowering on last year's wood. This keeps the shrub fresh and removes winter damage.

Change the ho-hum tune of your garden with iBloom® Rock-N-Roll™ Hydrangeas! Set the stage for amazing colors and entertaining tomorrow by ordering your landscaping from the plant disc jockeys at Nature Hills Nursery today!