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5 Reasons Why Summer Crush Hydrangea Not Blooming

Today, we’re diving into why your Summer Crush hydrangea might not be showing off its stunning blooms, something that can be a real letdown for gardeners.

The main culprits behind its lack of flowers include not getting enough sunlight, over-fertilization, and damage from frost. To coax your hydrangea into blooming, make sure it basks in at least 4 hours of direct sunlight daily and keep fertilizing to a minimal 2 to 3 times per year. Additionally, wrapping up the shrub during winter can shield its budding flowers from the cold.

summer crush hydrangea not blooming

Summer Crush Hydrangea

1. Lack of Sun

Summer Crush hydrangeas thrive when they soak up direct sunlight, which is crucial for their blooming. Without enough light, you won’t see those beautiful flowers. Aim to give your hydrangea 4-6 hours of morning sunlight each day, allowing it to enjoy some shade for the remainder of the day.

However, it’s important to steer clear of placing your Summer Crush in a spot where it gets full sun all day long, as this can lead to sunburn. The flowers may fade in color, and you might notice the blooms turning partly brown.

If you find yourself needing to move your hydrangeas to ensure they get the perfect balance of sunlight and shade, the best time to do this is early spring, before the buds begin to open. Be extra careful not to harm the roots while transplanting.

2. Overfertilization

Another reason your Summer Crush hydrangea might not be blooming is due to over-fertilization, particularly with fertilizers high in nitrogen. This leads to the plant focusing on growing leaves and branches at the expense of flowers.

To prevent this, it’s key to fertilize your hydrangea just enough. Start with an application in early spring, followed by a second one right after it finishes blooming. There’s no need for more fertilization beyond these two times.

Opt for a balanced fertilizer, one that has equal parts nitrogen, phosphorus, and potassium. Slow-release pellets are the best choice for this.

Incorporating compost as part of your feeding routine is also beneficial. Mulch your hydrangea annually with 1-2 inches of compost. Organic fertilizers are particularly effective for nourishing these plants.

Read also: How To Care For Summer Crush Hydrangea

3. Cold Injury

A severe frost can also jeopardize the bloom of your Summer Crush hydrangea, especially in zones 5 and 6, where low temperatures can harm the plant. This might result in the death of the flower buds, though you may still observe some flowering on new growth, albeit less plentifully.

To shield your hydrangea from frost, covering it with a protective material is a great starting point. Market-available kits, which include a frame and a cover, offer a straightforward solution for frost protection.

Alternatively, you can create a barrier around the shrub using chicken wire, forming a cage-like structure around the hydrangea.

Once the cage is in place, fill it up with fresh, dry leaves. This method provides excellent insulation against cold temperatures and is both effective and economical.

4. Improper Pruning

Trimming your Summer Crush hydrangea at the wrong time could mean missing out on its blossoms for the year. Because Summer Crush produces flowers on both new and old wood, it’s generally forgiving about when it’s pruned. However, pruning during its blooming period is the exception. Cutting it back then means you’re likely to snip off the developing flower buds, leading to a flowerless season.

To prevent this, it’s best to remove the spent flower heads right after they wilt. This encourages the plant to set buds for the following year’s flowers. Alternatively, pruning in the fall or early spring is okay, but keep in mind that this will result in flowers only on the new growth.

5. Pests

Hydrangeas can fall victim to insect infestations, where pests attach themselves to the stems and drain the plant’s vital juices, sapping its strength. This energy drain can hinder blooming and cause the leaves to turn yellow.

Aphids are the most frequent offenders, though spider mites are also known to trouble Summer Crush hydrangeas. To combat these pests, treat your plant with horticultural oil, and be prepared to apply a second round of spraying after a while for best results.

When does Summer Crush Hydrangea bloom?

The bloom time for Summer Crush hydrangeas can vary with the climate, typically starting in late spring or early summer. In cooler climates, you might notice a delay in flowering. Various other factors can also affect when the blooming begins.

The flowering period lasts around a month and a half, wrapping up by midsummer when the seeds start to mature and the vibrant inflorescences fade to brown.

One of the standout features of Summer Crush is its ability to bloom again. Towards the end of summer or the beginning of fall, it offers a second round of flowers. While this later bloom may not be as prolific as the first, the beauty of these flowers remains undiminished.