Endless Summer hydrangeas are planted in spring or fall.

Note that hydrangeas can be toxic to people and pets.

A location that receives morning sun and dappled afternoon shade is ideal.

Light purple Endless Summer hydrangea flower clusters next to deep purple flower clusters

The Spruce / Gyscha Rendy

If these hydrangeas are planted in full sun, conditions might be too intense for the plants to bloom.

Planting in too much shade results in weak stems and fewer blooms.

Soil

Nutrient-rich, well-drained soil is ideal for Endless Summer hydrangeas.

Light green, purple, and white Endless Summer hydrangea flower clusters on stems

The Spruce / Gyscha Rendy

A soil pH below 6 produces blue blooms, and a soil pH above 6 produces pink blooms.

Water

Endless Summer hydrangeas have medium to high water needs.

Throughout the growing season, the soil should be kept evenly moist but not waterlogged.

Deep purple and light purple Endless Summer hydrangea flower clusters

The Spruce / Gyscha Rendy

Ensuring the plant has proper drainage is imperative to prevent root rot.

This means that flowering is quite reliable, regardless of winter temperatures.

Use a granular, slow-release fertilizer with anNPK ratio of 10-30-10, which contains a higher percentage of phosphorus.

Endless Summer hydrangeas bloom on the previous years stems as well as the new seasons stems.

Never prune them in the fall.

If at all, spring is the time to prune without the risk of removing flower buds.

Wait until green leafy growth appears on the stems.

verify to remove only dried brown buds located higher up on the stems.

Potted hydrangeas need frequent watering, possibly daily.

Water deeply and slowly until water drips out of the drainage holes.

If you leave them outdoors, water them if precipitation is sparse.

Each of these common ailments can be successfully eliminated with proper treatment.

Prevent powdery mildew by providing plenty of air circulation around plants.

Remove aphids or spider mites with a blast of water from the hose or a shot of insecticidal soap.

Hand-pick beetles from the plants and drop them into soapy water.

How Long Does Endless Summer Hydrangea Bloom?

Hot, dry weather tends to cut the bloom period short while cooler temperatures encourage a longer bloom.

What Do Endless Summer Hydrangea Flowers Look and Smell Like?

The color intensifies as the blooms mature.

The flowers have a mild floral fragrance.

Above all, do not prune it in the fall, as this will decimate next year’s bloom.

Remove the spent flowers just below the flower head and above the next set of leaves.

The leaves should recover at dusk as it gets cooler.

Run through the list ofseven reasons for yellowing hydrangea leavesto determine what is ailing your plant.

Another possible reason is that you added too much aluminum sulfate to change the color of the blooms.

In that case, flush the soil with water to remove the excess salts or fertilizers.

The best location to ensure continuous bloom is one where the plant receives morning sun and afternoon dappled shade.

In too much sun, they might stop blooming.

It depends on the pH level of your soil.

When planted as a focal point or specimen, give them 8 feet of space all around.

North Carolina State Extension.

Hydrangea Planting and Care.

How Do I Protect My ENDLESS SUMMER Hydrangea Over the Winter?.

University of New Hampshire Extension.