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Endless Summer® Reblooming Hydrangea
Hydrangea macrophylla 'Bailmer' PP15298
Endless Summer® is the hydrangea I point to when someone says, “I love hydrangeas… I just can’t get them to bloom.” It’s the original reblooming mophead—built to flower on old and new wood—so it’s more forgiving, more reliable, and way less stressful than many traditional bigleaf types. Give it morning sun, afternoon shade, and steady moisture, and you’ll get that classic blue-to-pink color show again and again through the season.
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Endless Summer® Hydrangea for Long-Season Mophead Blooms, Blue-to-Pink Color, and Reliable Repeat Flowers
The Original Reblooming Hydrangea That Changed The Category
Endless Summer® is the hydrangea that made “reblooming” a household term. If you’ve ever had a bigleaf hydrangea give you lush leaves but no flowers after winter, this is the upgrade that solves that heartbreak. It’s famous for blooming on both old wood and new wood, which means it can produce flowers even when winter damages stems or when pruning timing isn’t perfect. That built-in flexibility is why Endless Summer® remains a go-to for gardeners who want dependable hydrangea color.
In the landscape, it delivers classic mophead blooms—full, rounded flowers that feel timeless and rich. It’s beautiful in foundation beds, mixed borders, and bright-shade plantings where you want a big, soft burst of summer color. Plant it where you’ll see it often, because this shrub earns its keep with repeated flower cycles and a lush, leafy presence that makes beds feel full and finished.
Big Mophead Blooms With Blue, Pink, Or Purple Color Options
Endless Summer® brings the classic hydrangea color story to life. Blooms can skew blue in acidic soil, pink in more alkaline soil, and often land in purple tones somewhere in the middle. That means you get a personalized look that reflects your garden’s soil chemistry—or you can gently steer the color over time by keeping soil conditions consistent. Either way, the mophead blooms read bold and saturated, especially when the plant is well-watered and protected from harsh afternoon sun.
For the strongest color and bloom size, focus on the basics: rich soil, consistent moisture, and a spot that gets morning sun with afternoon shade (or bright filtered light). Hydrangeas don’t like drought stress during bud set and bloom time, so mulch and deep watering matter. When the plant stays comfortable, the flowers look fuller, the color holds better, and rebloom cycles are more reliable.
A Landscape-Ready Shrub That Fills Space Beautifully
Endless Summer® typically matures around 3 to 5 feet tall and about 3 to 5 feet wide, forming a rounded shrub with a substantial presence. It’s big enough to anchor a bed, but still manageable in most home landscapes. Use it as a focal point near an entry, in a repeating rhythm along a foundation, or as a flowering “mid-layer” between lower perennials and taller evergreens.
Because it’s such a versatile size, it also works well in mass plantings where you want a long season of color without constantly swapping annuals. Give each plant enough space for airflow, so foliage stays cleaner, and the shrub can develop strong stems. With smart spacing and steady moisture, Endless Summer® becomes one of those shrubs that makes your garden look professionally planned—lush, balanced, and bloom-forward.
Easy Care And Pruning That Doesn’t Require Perfect Timing
One of the most shopper-friendly things about Endless Summer® is that it’s not a hydrangea that punishes you for pruning. The best approach is simple: in early spring, remove dead stems and winter damage, then let the shrub grow. Because it blooms on old and new wood, it has more ways to produce flowers than many traditional bigleaf hydrangeas. Minimal pruning also helps keep more flowering stems in place, which usually means more blooms.
If you need to shape or slightly reduce the size, do it right after a major flush of flowers and keep cuts light. Avoid aggressive late-summer or fall pruning, which can reduce future bud development and stress the plant going into winter. Pair that gentle pruning approach with consistent watering and a 2–3 inch mulch layer, and you’ll have a reblooming hydrangea that stays healthy, tidy, and reliably colorful.
| Hardiness Zone: | 4-9 |
|---|---|
| Mature Height: | 3 to 5 feet |
| Mature Width: | 3 to 5 feet |
| Sunlight: | Morning sun to partial shade (afternoon shade best) |
| Bloom Time / Color | Summer into fall; blue in acidic soil, pink in alkaline soil, purple in between |
| Pruning Season: | Prune in late winter to remove any dead stems, flowers on old and new wood |
| Soil Condition: | Rich, well-drained soil with consistent moisture |
| Water Requirements: | Medium-high; water regularly, especially first year and in heat |
| Wildlife Value | Can attract pollinators; dense shrub adds garden habitat |
| Resistance | Not reliably deer resistant; improved bloom reliability (old + new wood); not drought tolerant |
| Landscape Uses | Foundation planting, mixed borders, part-shade beds, informal hedge, containers, cut flowers |
How to Care for Endless Summer® Reblooming Hydrangea
Be sure to read our planting instructions to ensure a healthy and happy Endless Summer® Hydrangea for years to come!
How should I plant Endless Summer® Hydrangea?
Plant Endless Summer® in a location with morning sun and afternoon shade, or bright filtered light. Dig a hole about twice as wide as the root ball and set the shrub so the top of the root ball sits level with the surrounding soil. Backfill with native soil amended with compost, then water deeply to settle roots and remove air pockets. Finish with 2–3 inches of mulch to keep roots cool and soil evenly moist, keeping mulch a few inches away from the stems. Hydrangeas rebloom best when stress stays low, so choose a spot that’s easy to water during summer heat. If planting multiple shrubs, give them enough space to mature without crowding.
How often should I water Endless Summer® Hydrangea after planting?
Water deeply right after planting, then keep the soil consistently moist for the first several weeks. A good baseline is 1 to 2 deep waterings per week, adjusted for heat, wind, and drainage. Hydrangeas prefer steady moisture, so avoid letting the root zone dry completely between waterings. After the first season, continue watering during dry spells—especially when buds form, and blooms develop. Water at the base to keep foliage drier and reduce leaf issues. Mulch helps stabilize moisture, which supports stronger flowering and more consistent rebloom.
When should I fertilize Endless Summer® Hydrangea?
Fertilize in spring as new growth begins using a slow-release shrub fertilizer or one labeled for hydrangeas. Apply it over the root zone (not against the stems) and water afterward so nutrients move into the soil. Compost is also a great add-on for improving soil structure and moisture retention. If you want to support strong summer performance, a light second feeding in early summer can help, but avoid heavy late-season fertilizing. Pushing lots of late growth can reduce cold hardiness and may interfere with bud and bloom timing. Consistent, moderate feeding supports better foliage and repeat flowering.
When and how should I prune Endless Summer® Hydrangea?
Prune Endless Summer® lightly in early spring by removing any clearly dead stems and tidying winter damage. Because it blooms on both old wood and new wood, heavy pruning isn’t required and can reduce the number of flowering stems. Focus on cleanup and gentle shaping rather than hard cutbacks. If you need to shape or slightly reduce size, do it right after a major flush of flowers and keep cuts light. Avoid aggressive pruning in late summer or fall, which can reduce future bud development and stress the plant going into winter. Minimal pruning plus consistent moisture is the simplest path to repeat blooms.
