Incrediball® Hydrangea

Incrediball® Hydrangea grows in USDA zones 3 to 8 and performs best in full to part sun — ideally morning sun with afternoon shade in hot climates. Give it rich, consistently moist, well-drained soil; smooth hydrangeas are not picky about pH and bloom white regardless.

Planting

1. Choose a site with full to part sun and protection from harsh afternoon heat in warmer zones.
2. Dig a hole twice as wide as the root ball and just as deep, loosening the surrounding soil.
3. Set the plant so the crown sits level with the surrounding soil, never buried deeper than it grew in the pot.
4. Backfill with the native soil amended with compost, firm gently, and water in thoroughly to settle out air pockets.
5. Apply 2 to 3 inches of mulch over the root zone to hold moisture, keeping it pulled back from the stems.

Care & maintenance

• Water. Keep the soil evenly moist, especially the first two seasons and during summer heat. The big leaves wilt quickly when dry but recover with a deep soak.
• Feed. Apply a balanced slow-release shrub fertilizer in early spring as growth begins; avoid heavy late-season feeding.
• Light. Full to part sun gives the strongest stems and most blooms; too much deep shade reduces flowering.
• Prune. This hydrangea blooms on new wood, so prune in late winter or very early spring. Cut stems back by about a third for the largest heads, or leave them taller for more (slightly smaller) blooms on a fuller frame.
• Mulch & winter care. Maintain mulch year-round to moderate soil temperature and moisture. The plant is reliably hardy and needs no special winter protection in zones 3 to 8.
• Pests & disease. Generally trouble-free. Watch for aphids and occasional powdery mildew or leaf spot in crowded, humid spots; good air circulation prevents most issues.

Bloom tip: Smooth hydrangeas do not change color with soil pH, so no need to amend for blue or pink — the blooms move from green to white to soft chartreuse on their own. Cut flowers for arrangements or leave the dried heads up for winter interest.

When does it bloom and how long?

Incrediball® flowers from early-to-mid summer into fall. The blooms open green, age to white, then settle into a soft antique green, giving you weeks of changing interest on a single plant.

Why isn't my Incrediball® blooming?

The most common causes are too much shade or pruning at the wrong time. Since this hydrangea blooms on new wood, prune only in late winter or early spring — cutting it back in summer or fall removes the coming season's flower buds. Excessive nitrogen fertilizer can also push leafy growth at the expense of blooms.

Can I change the flower color to blue or pink?

No. Smooth hydrangeas like Incrediball® bloom white and don't respond to soil pH the way bigleaf (mophead) hydrangeas do. The green-to-white-to-chartreuse progression is natural and happens regardless of your soil.

When and how should I prune it?

Prune in late winter or early spring before new growth starts. Cutting stems back by about a third encourages the biggest flower heads. If you want a fuller shrub with more numerous (somewhat smaller) blooms, prune more lightly and leave a taller framework of woody stems to support the heavy heads.

Will the stems hold up the big blooms?

Yes — sturdy, upright stems are the signature trait of this selection. They're markedly stronger than older smooth hydrangeas like 'Annabelle', so the basketball-sized heads stay upright instead of flopping after rain. Light spring pruning helps keep stems thick and supportive.

Does it grow in sun or shade, and can I use it as a hedge?

It thrives in full to part sun, with afternoon shade appreciated in hot climates. At 4 to 5 feet tall and wide with a fast growth rate, it makes an excellent informal flowering hedge, foundation row, or border anchor when spaced about 4 to 5 feet apart.