The Incrediball Hydrangea (Hydrangea arborescens ‘Incrediball’) is a deciduous shrub known for its massive, perfectly round, pure white flower heads that emerge in early to mid-summer. Unlike other hydrangeas, the blooms maintain their shape and size without drooping, creating a dramatic presence in the garden. Foliage is bright green, turning a subtle yellow in fall, providing a neat and attractive backdrop to the bold blooms.
- Size: Height: 4–5 feet (1.2–1.5 m). Spread: 4–5 feet (1.2–1.5 m).
- Light: Prefers full sun to partial shade; in hotter climates, some afternoon shade protects blooms.
- Soil: Moist, well-drained soil rich in organic matter; tolerates clay but performs best in loamy soil.
- Watering: Regular watering, especially during dry periods; keep soil consistently moist but not waterlogged.
- Pruning: Prune in late winter or early spring; cut back old wood to encourage vigorous new growth and larger blooms.
- Fertilizer: Apply balanced, slow-release fertilizer in early spring; avoid excessive nitrogen which can reduce flowering.
- Pests/Diseases: Generally low-maintenance; watch for aphids or powdery mildew in humid conditions.
- Winter Care: Hardy to USDA zones 3–9; mulch around base to protect roots in colder regions