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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.
| Category | |
|---|---|
| Growth Rate | Rapid |
| Growth Period | Spring, Summer |
| Lifespan | Moderate |
| Plant Nativity | Cultivated, or not in the U.S. |
| Commercial Availability | Routinely Available |
| 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 |
| 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 |
| 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 |
| Leaf Retention | No |
|---|---|
| Palatability | Low |
| Fire Resistant | No |
Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA
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