Hydrangea serrata ‘Little Geisha’

mountain hydrangea

  • © Joy Creek Nursery

Outstanding Qualities

'Little Geisha' mountain hydrangea blooms light pink to light blue, depending on the pH of the soil in early summer. The flower shape is unusual for this type by having mop-head flowers rather than the typical lace-cap; nevertheless, this cultivar is quite charming and perfect for the smaller garden or space as it is compact and does not get huge.

Quick Facts

Plant Type: round shrub

Foliage Type: deciduous

Plant Height: 4 ft. 0 in. (1.22 meters)

Plant Width/Spread: 4 ft. 0 in. (1.22 meters)

Plant Height-Mature: 6 ft. 0 in. (1.83 meters)

Plant Width-Mature: 6 ft. 0 in. (1.83 meters)

Hardiness: USDA Zones 6 to 9

Flower Color: pink

Sun/Light Exposure: light to open shade

Water Requirements: regular watering

Seasonal Interest: lovely light pink to light blue flowers in early summer, depending on soil pH

Colors & Combos

Great Color Contrasts: if pink flowers: dark green, purple, violet

Great Color Partners: if pink flowers: lavender, pink, rose, white

Culture Notes
Mountain hydrangeas grow best in light to open shade. A location protected from hot sun will keep the foliage and flowers from prematurely fading or scorching. A humus-rich, well-drained soil produces the best growth and flowering. Hydrangeas are not drought tolerant and will grow and flower more prolifically with regular summer watering. The typically acidic soils of the Pacific Northwest will cause the variable flowers to bloom with purple and blue tones. For pink flowers, add lime to raise the pH and sweeten the soil. Have a soil test done to determine the amount of lime. Changing the color can often take a few years to accomplish with more than one application of lime. Remove a few old twiggy branches to the ground yearly or prune lightly to improve the overall shape. Heavy pruning can ruin the flowering for the following year. Consult an experienced pruner or take local classes before attempting substantial pruning.