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Pistachio Hydrangea

Hydrangea macrophylla 'Horwack' (PP#25,577)

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Pistachio Hydrangea

Hydrangea macrophylla 'Horwack' (PP#25,577)

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#3 Container

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Single Plant

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Special Features
Zone Map
Spring Color
Summer Color
Tolerates Acidic Soil

Botanical Name

Hydrangea macrophylla 'Horwack' (PP#25,577)

Outdoor Growing zone


Mature Height


Mature Width


Sun needs

Partial Sun, Shade



The Pistachio Hydrangea is a new, novel, mophead hydrangea with unique flowers. The dome-shaped heads of flower begin as a pale-green color. As they develop they turn exciting shades of chartreuse and pistachio green. Then tones of scarlet or violet develop, and the center turns clear blue, making a kaleidoscope of color that has never been seen before in hydrangea flowers. As well, these plants flower on both old and new shoots, so in warmer areas you have continuous flowering from summer to late fall, and in colder areas from late summer through fall. Wherever you live you can enjoy the beauty of this plant. It forms a broad shrub, 2 to 3 feet tall, and up to 5 feet wide. This is low and relatively small for a hydrangea, so it is an ideal choice for a smaller garden. This plant grows well in partial sun, particularly in situations with morning sun and shade from noon onwards. It also grows well in the shade on the north side of your home, and in light shade beneath deciduous trees.

  • Unique flowers in chartreuse green, scarlet, purple and blue
  • Perfect plant for partial or full shade
  • Blooms summer to fall in warm areas
  • Flowers from late summer through fall in colder areas
  • Easily grown in ordinary soil, but not drought-resistant

Grow your Pistachio Hydrangea in any well-drained garden soil. Its colors are stable in both acid and alkaline conditions, simply becoming a little more purple-red in very acid soil. It does best with plenty of water, so water new plantings twice a week, and water established plants at least weekly during any dry weather. Remember that beneath trees it may be dry, even after rain, so check the soil around your plants. Prune in spring to remove any dead stems, and even if all the branches have died, this hydrangea will re-sprout from the base and flower by late summer. This plant is easy to grow and does no suffer from pests or diseases.

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