French Hydrangea (Macrophylla)

The French Hydrangea (Macrophylla) has green foliage and inconspicuous blue flowers, with conspicuous fruits or seeds. The greatest bloom is usually observed in the indeterminate, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The French Hydrangea (Macrophylla) has a moderate life span relative to most other plant species and a rapid growth rate. At maturity, the typical French Hydrangea (Macrophylla) will reach up to 4 feet high, with a maximum height at 20 years of 4 feet.

The French Hydrangea (Macrophylla) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by bare root, container, cuttings. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -13°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
Growth Period Spring, Summer
Lifespan Moderate
Plant Nativity Cultivated, or not in the U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Indeterminate
Displays Fall Colors No
Shape/Growth Form Multiple Stem
Drought Tolerance Medium
Shade Tolerance Tolerant
Height When Mature 4
Vegetative Spread None
Flower Color Blue
Flower Conspicuousness Yes
Fruit/Seed Seasonality Summer Fall
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Cuttings
Moisture Requirements Low
Cold Stratification Required Yes
Minimum Temperature -13
Soil Depth for Roots 12
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability Yes
Responds to Coppicing No
Growth Requirements
pH Range 4.5–8 pH
Precipitation Range 35–35 inches/yr
Planting Density 1700–2700 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 12
Minimum Frost-Free Days 145 day(s)
Salinity Tolerance None
CaCO3 Tolerance None
Sustainability & Use
Leaf Retention No
Palatability Low
Fire Resistant No

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA