Hydrangea macrophylla Endless Summer® PP15298, commonly known as Endless Summer Hydrangea, is a standout reblooming shrub that delivers large, rounded mophead blooms from late spring through fall. Unlike traditional bigleaf hydrangeas that flower only on old wood, Endless Summer® blooms on both old and new growth—ensuring a reliable and extended flowering season even after a tough winter. The flower color ranges from rich pink in alkaline soils to striking blue in acidic conditions, giving gardeners the ability to adjust hues through soil pH.

Growing 3 to 5 feet tall and wide, this deciduous shrub has a full, rounded form and dark green foliage that remains attractive throughout the season. Its versatility makes it ideal for foundation plantings, mixed borders, cutting gardens, and even large containers. It thrives in full sun to part shade with evenly moist, well-drained soil, and offers excellent cold hardiness for a macrophylla hydrangea.

Why choose Hydrangea macrophylla Endless Summer® PP15298

Reliable reblooming: Produces flowers on both old and new wood for a longer display

Adjustable color: Blooms range from pink to blue depending on soil pH

Cold-hardy and compact: Performs well in cooler climates and smaller spaces

Cultivating tips

Sun exposure: Full sun to part shade (afternoon shade in hotter zones is ideal)

Soil needs: Moist, well-drained soil enriched with organic matter

Maintenance: Medium—deadheading encourages more blooms; minimal pruning

Designs for your garden

Foundation planting: Great for filling space along buildings or garden edges

Border shrub: Makes a colorful impact in mixed beds

Container gardening: Compact size works beautifully in large planters

Cottage gardens: Pairs well with roses, salvia, and other romantic perennials

Ecological benefits

Pollinator-friendly: Attracts bees and butterflies

Long-season interest: Flowers for several months across multiple flushes

Low fertilizer needs: Performs well with minimal feeding when soil is enriched

Looking for native alternatives?

Clethra alnifolia ‘Ruby Spice’ – Ruby Spice Summersweet: A fragrant native shrub with upright pink flower spikes that bloom in mid to late summer and attract bees and butterflies.
Clethra alnifolia ‘Hummingbird’ – Dwarf Summersweet: A compact native shrub with fragrant white blooms, ideal for smaller spaces and shaded borders.
Itea virginica ‘Henry’s Garnet’ – Henry’s Garnet Sweetspire: A native shrub with cascading white flowers in spring and brilliant red fall foliage, perfect for moist soils and naturalized borders.