Bigleaf Hydrangea, French Hydrangea, Mophead
Hydrangea macrophylla 'Merritt's Supreme'

Family: Hydrangeaceae (hy-drain-jee-AY-see-ee) (Info)
Genus: Hydrangea (hy-DRAIN-juh) (Info)
Species: macrophylla (mak-roh-FIL-uh) (Info)
Cultivar: Merritt's Supreme
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Height:

36-48 in. (90-120 cm)

Spacing:

Unknown - Tell us

Hardiness:

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Rose/Mauve

Red

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Deciduous

Other details:

Unknown - Tell us

Soil pH requirements:

4.5 or below (very acidic)

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us

Regional

This plant has been said to grow in the following regions:

Duarte, California

San Leandro, California

Tallahassee, Florida

Bethlehem, Georgia

Marietta, Georgia

Constantine, Michigan

Decatur, Mississippi

Brevard, North Carolina

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Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

On Jun 16, 2006, Pashta from Moncks Corner, SC (Zone 8b) wrote:

I kept mine fairly moist at all times, and it gave me gorgeous blooms. I got 5 off the plant this year, each being about 6 inches or so across. Im hoping next year is even better. The get full sun in the afternoon, otherwise its bright ambient light until sunset.

Positive

On Dec 2, 2004, lmelling from Ithaca, NY (Zone 5b) wrote:

Compact, usually not exceeding 5'. Thick, sturdy branches. Flowerheads have 5 or 6 sepals making flowers look double, serrate; flower heads stay in good condition turning green, red or purple tinted in fall. Colors range from pink to carmine red in alkaline; purplish/rose in acid soil. Hardiness is suspect. No zone given.