Bigleaf Hydrangea, French Hydrangea. Up until recently, if you wanted a blue Hydrangea, you needed acidic soil; otherwise it was pink.

Toxicity: Toxic to Dogs, Toxic to Cats, Toxic to Horses
Toxic Principles: Cyanogenic glycoside
Clinical Signs: Vomiting, depression, diarrhea. Cyanide intoxication is rare – usually produces more of a gastrointestinal disturbance.

Family: Hydrangeaceae (hy-drain-jee-AY-see-ee) (Info)

Genus: Hydrangea (hy-DRAIN-juh) (Info)

Species: macrophylla (mak-roh-FIL-uh) (Info)


Height: 4-6 ft. (1.2-1.8 m), 6-8 ft. (1.8-2.4 m)


Spacing: 4-6 ft. (1.2-1.8 m)



USDA Zone 4a: to -34.4 °C (-30 °F)

USDA Zone 4b: to -31.6 °C (-25 °F)

USDA Zone 5a: to -28.8 °C (-20 °F)

USDA Zone 5b: to -26.1 °C (-15 °F)

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: Pink, Pale Green, Light Blue, Medium Blue, Purple, White/Near White


Bloom Time: Late Summer/Early Fall


Foliage: Deciduous


Other details: Requires consistently moist soil; do not let dry out between waterings


Soil pH requirements: 5.6 to 6.0 (acidic), 6.1 to 6.5 (mildly acidic), 6.6 to 7.5 (neutral)


Patent Information: Non-patented


Propagation Methods: By dividing the rootball, From softwood cuttings, From semi-hardwood cuttings, From seed; direct sow outdoors in fall, From seed; winter sow in vented containers, coldframe or unheated greenhouse, From seed; sow indoors before last frost


Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds


Read more: http://davesgarden.com/guides/pf/go/146/#ixzz3Ha5gqg2q

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