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Hydrangea – Incrediball®

Garden Height
48 - 60
Spacing
60 - 72
Spread
48 - 60
Habit
Mounded
Container Role
Thriller
Flower Size
Medium
Flower Colors
White
Light Level
Part Sun to Sun, Sun
Proven Winners

Native to North America

Maintenance Notes

For the biggest, most abundant blooms and strongest stems, plant where it gets at least six hours of sun each day (warmer climates can get away with a bit less). A good layer of shredded bark mulch helps minimize water loss.

As for pruning, cut the entire plant back by about one-third its total height each spring, just as the new growth begins to emerge on stems. This serves to build up a strong, supportive, woody base while also encouraging abundant new growth for plenty of flowers. 

If you wish to fertilize, an application of a rose fertilizer in early spring, once the soil has thawed, is sufficient. 

Uses Notes

Landscapes, naturalizing, hedges, perennial gardens. Also makes a very dramatic cut flower.

Maintenance Category Easy

Water Category Average

Blooms On New Wood

Bloom Time

Flower Form Cut Flower, Dried Flower, Landscape

pH B - pH 5.8 - 6.2

EC (2:1 Extraction Method) 1 - 2

Fertilization 200 - 300

Light Requirements Medium, High

Water Requirements Moist to Wet

Rooting Out Temperature 65 - 72° Fahrenheit

Growing On Temperature 60 - 65° Fahrenheit

Holding Temperature 40 - 50° Fahrenheit

Planting and Timing Information
Spring to Fall Finish, 1 ppp

Pinching and Growth Regulators
Early and frequency pruning or pinching is the key to producing a full container. Can be open and leggy with out enough pruning early. Flowers on new growth so you will want to stop pruning by early June to allow flower buds to set.

Pest and Disease Management
phids, Leaf Spot

Grower Tips
This adaptable native plant produces huge flowers (as much as 12" across) and is both reliable and beautiful. Flowers open green, then mature to white before turning green at the end of their life cycle. Very cold hardy Incrediball blooms on new growth so even very cold winters won't keep it from blooming. The flowers are held upright on very sturdy stems, so they don't flop like 'Annabelle' will. Prune back in late winter to encourage strong new growth and flowering. Flower color is not affected by soil pH. Best in moist, well drained soil but adapts to most sites.