Twist n Shout Hydrangea
Latin Name: Hydrangea macrophylla ‘P11HM-1’
Type: Deciduous shrub
Zone: 4 to 9
Height: 3 to 4 feet
Spread: 4 to 5 feet
Bloom Time: May to September
Bloom Description: Deep rose (alkaline soil) to violet blue (acidic soil)
Sun: Part shade
Tolerates full sun only if grown in consistently moist soils. Soil pH affects the flower color. Add aluminum sulfate to the soil to make the flowers bluer or add lime to the soil to make the flowers pinker. Begin soil treatments well in advance of flowering, as in late fall or early spring. Plants generally need little pruning, but if needed, prune immediately after flowering by cutting back flowering stems to a pair of healthy buds.
A hydrangea that blooms from late spring to fall. Large flower clusters make for a showy plant, and flower color can be controlled by soil pH.