Incrediball Storm Proof™ Smooth Hydrangea (arborescens) | Proven Winners® New Variety 2026
You can only choose one Ship Week per order for all plants in order to check out.
How Does Proven Winners® Measure Plant Sizes?
We list our plants by container size, which reflects the amount of soil and root growth each plant has when it ships. Actual plant height and width vary by variety and season, and many plants grow quickly as the weather warms.
To help you understand what to expect, refer to our size guide below. You can also find each plant’s approximate arrival size and mature size on its product page.
How Does Proven Winners® Measure Plant Sizes?
How Does Proven Winners® Measure Plant Sizes?
Plant Height By Container Size
This chart highlights the typical heights for each size category while also showing how container sizes compare, giving you a clear, straightforward way to understand plant size at arrival and choose the best fit for your gardening needs.
This chart shows typical plant heights and compares container sizes, helping you quickly understand arrival size and choose the best fit.
Soil Volume By Container Size
This chart shows the typical soil volume for each container size, listed in both imperial and metrics units for easy comparison.
Proven
Winners®
Annuals
Proven
Winners® Perennials
Proven
Winners®
Shrubs
Proven
Winners®
Supplies
Proven Winners® Annuals
Proven Winners® Perennials
Proven Winners®
Shrubs
Proven Winners®
Supplies
-
-
-
Introducing Incrediball Storm Proof™, the hydrangea that tackles one of the most common frustrations with the genus: floppy blooms. Unlike traditional smooth hydrangeas, which often struggle to hold their heavy flowers upright, this incredibly sturdy variety is built to withstand even the heaviest summer downpours. Its strong, resilient stems keep blooms standing tall—during and after a storm—ensuring your garden remains vibrant and intact no matter the weather. While the blooms aren't as large as those of the original Incrediball®, they're still impressively large in proportion to this more compact variety. And with an abundance of these stunning blooms, Incrediball Storm Proof™ easily lives up to its well-established reputation. This hydrangea boasts a robust, vigorous growth habit with a rounder, denser form than other smooth hydrangeas, making it a perfect choice for smaller spaces or those looking for a lower-maintenance yet high-impact plant. Whether you're a hydrangea enthusiast or a newcomer to the genus, Incrediball Storm Proof® is a must-have for your garden, delivering beauty and durability all season long.
- 3.5-4 feet tall and 3-4 feet wide at maturity
- Hardy in zones 3-8, be sure to check your USDA zone to ensure success
- Plant in part to full sun (4+ hours daily)
- Space plants 3-4 feet apart for best results
- Produces white flowers that age to light green from summer to frost
- Maintains green foliage spring to frost
- Blooms on new wood
- Great for landscapes, hedges and cut flowers
- Attracts bees and butterflies
- Salt tolerant
Care: Fertilize with Proven Winners Continuous Release Plant food in spring and mid-summer. Prefers well-drained soil that does not remain soggy for any amount of time. To prune, simply cut back by one-third of its total height every spring, just as new growth begins to emerge on stems. Make cuts just about 1/4 of an inch above a bud. Dead or damaged wood can be removed at any time.
Shipping Info:
- Enjoy free shipping on orders over $175
- Size at shipping varies by season, plant, and trimming schedules
- 1-Gallon shrubs are 6-24" tall at shipment
- Quart shrubs are 5-8" tall at shipment
- Shrubs ship dormant November through April
Read our guide to get started with planning a garden
