Hydrangea Leaves Turning Red – Reasons and Solutions

Hydrangeas, with their beautiful blooms and lush foliage, are a favorite amongst garden enthusiasts. But, like any plant, they come with their own set of challenges. One such concern is the reddening of their leaves.

Understanding the reasons behind this phenomenon and finding solutions can keep these plants flourishing. Read on as we unravel this botanical mystery.

Overview: The Colorful World of Hydrangeas

The magic of hydrangeas isn’t just limited to their bountiful blooms but extends to their foliage, too. Sometimes, those green leaves take on a reddish hue. Let’s understand why.

The Natural Lifecycle

Hydrangeas and Seasonal Changes

  • Hydrangeas, being deciduous shrubs, undergo seasonal changes.
  • In the fall, it’s natural for their leaves to turn red, orange, or purple before shedding.
  • This is a part of their preparation for the dormant winter period.

The Role of Genetics

  • Some hydrangea varieties are genetically predisposed to have red-tinged leaves.
  • For instance, the ‘PeeGee’ hydrangea might display reddish foliage, especially under the sun.
  • Knowing the specific type of hydrangea you have can clarify if the red is a natural hue or a sign of distress.

Environmental Factors Affecting Leaf Color

Hydrangea Leaves Turning Red reason

Sun Exposure and Hydrangeas

  • Hydrangeas typically thrive in partial shade. However, they can tolerate some morning sun.
  • Too much direct sunlight can stress the plant, leading to red or brown leaves.
  • Placing them in an area that gets dappled sunlight can prevent this.

Watering Habits and Plant Health

  • Overwatering or underwatering can stress hydrangeas, causing their leaves to turn red.
  • It’s crucial to maintain consistent moisture, ensuring the soil is damp but not soggy.
  • A good rule of thumb is to water deeply once a week, adjusting based on weather conditions.

Underlying Issues: Identifying Problems Beyond Nature

Hydrangea Leaves Turning Red why

While some red coloring can be attributed to natural causes, sometimes it’s an indicator of a deeper issue. Recognizing these problems can be the first step towards healthier hydrangeas.

Diseases and Pests

Common Diseases Affecting Hydrangeas

  • Fungal diseases, like leaf spots or rust, can cause reddening of leaves.
  • Regular inspection can help in early detection, which can be treated using fungicides or organic remedies.
  • Proper spacing between plants can prevent the spread of these diseases.

Pesky Pests and Their Impact

  • Aphids, spider mites, and scale insects can cause red spots or stippling on hydrangea leaves.
  • Natural predators, insecticidal soaps, or neem oil can be effective in managing these pests.
  • Regularly checking the underside of leaves and removing affected ones can also help.

Nutrient Imbalances and Soil Quality

Importance of pH Levels in Soil

  • Hydrangeas are sensitive to soil pH. While soil pH affects bloom colors, extreme imbalances can stress the plant and affect leaf color.
  • A soil test can determine pH levels and guide any necessary adjustments using lime or sulfur.
  • Regularly amending soil with compost can maintain its health and pH balance.

Essential Nutrients and Their Role

  • Hydrangeas require a balance of nitrogen, phosphorous, and potassium.
  • A deficiency or excess of any nutrient can result in red leaves.
  • Using a balanced, slow-release fertilizer can ensure the plant gets what it needs without overloading it.


Hydrangea Leaves Turning Red causes

Your hydrangeas needn’t remain in distress. With the right interventions, they can return to their vibrant best.

Adjusting Care Practices

Revamping the Watering Routine

  • Ensure you’re watering the base of the plant, avoiding water on the leaves, which can foster disease.
  • Use a soaker hose or drip irrigation system for even, deep watering.
  • Adjust the watering frequency based on rainfall and season.

Reconsidering Plant Location

  • If your hydrangeas are getting too much sun, consider relocating them.
  • An area with morning sun and afternoon shade is ideal.
  • Ensure they’re not crowded with other plants, which can restrict airflow and foster disease.

Seeking Professional Advice

When to Consult an Expert

  • If you’ve tried multiple interventions without success, it might be time to consult a horticultural expert.
  • Sometimes, the issue might be deeper than surface-level symptoms.
  • An expert can offer insights tailored to your plant’s specific needs and environment.

Staying Educated and Proactive

  • Regularly attending workshops or joining gardening clubs can keep you updated on best practices.
  • Preventive measures, such as soil testing and routine inspections, can preempt potential issues.
  • Being proactive ensures your hydrangeas remain healthy and vibrant, showcasing their natural beauty.

Exploring Varieties

Hydrangea Leaves Turning Red sunlight

Certain hydrangeas wear their red leaves with pride. If you’re enamored by the crimson hue and want it as a purposeful part of your garden, there are hydrangea varieties that naturally exhibit red foliage.

Species That Naturally Display Red Foliage

Hydrangeas with a Reddish Charm

  • The Oakleaf hydrangea (Hydrangea quercifolia) is known for its stunning fall color, where the leaves transition to a rich red.
  • The Mountain hydrangea (Hydrangea serrata), especially some varieties, may show a touch of red on their leaves, particularly in the cooler months.

Nurturing these Special Varieties

  • Even though these species have natural red tendencies, they still require proper care to flourish.
  • Ensuring they have the right soil, water, and sunlight conditions is paramount to maintaining their unique beauty.

Introducing Them to Your Garden

Blending Red-leaved Varieties with Others

  • Introducing a red-leaved hydrangea variety can add a new dimension to your garden, providing a striking contrast with green-leaved plants.
  • They can be paired with perennials like hostas and ferns, which appreciate similar conditions and can complement their aesthetic.

Planting and Maintenance Tips

  • When planting, ensure they have ample space to grow, which promotes healthy root development and reduces competition.
  • Prune them appropriately; removing dead stems or faded flowers encourages new growth and better blooms.

Nurturing Your Garden’s Masterpiece

Hydrangea Leaves Turning Red pests

Hydrangeas, often hailed as the stars of the garden, come with their set of intricacies. Their captivating colors, be it on blooms or leaves, echo the garden’s heartbeat, resonating with every gardener’s passion.

Growing Beyond Challenges

Taking Hurdles in Stride

  • Gardening is as much about facing challenges as it is about relishing the blooms.
  • Every reddened leaf or wilted flower is an opportunity to understand, adapt, and grow.

Building Resilience

  • Just as plants weather storms and droughts, gardeners, too, learn resilience.
  • With patience, knowledge, and care, you can ensure your garden thrives, regardless of the hurdles.

The Continuous Journey of Learning

Hydrangea Leaves Turning Red causes garden

Gardening: A Lifelong Endeavor

  • The world of plants is vast and ever-evolving. There’s always something new to learn, a new challenge to tackle, and a new beauty to appreciate.
  • Embrace every experience every lesson, and let it shape your journey as a gardener.

Sharing and Expanding the Love for Gardening

  • As you gather insights about your hydrangeas and other plants, share them with the community.
  • Together, we can cultivate gardens that are not just spaces of beauty but also hubs of knowledge and camaraderie.


Can I prevent my hydrangea leaves from turning red if I prefer the green look?

Yes, to a certain extent. If the redness is due to environmental factors like excessive sun or improper watering, adjustments in care can prevent the color change.

However, if the red tint is genetic or due to natural seasonal changes, it might be challenging to retain the pure green hue year-round.

Do red leaves affect the color or quality of the hydrangea blooms?

Generally, the redness in the leaves doesn’t directly affect the color of the blooms. However, if the underlying cause of the leaf redness (like nutrient imbalance or disease) is severe, it might indirectly impact the plant’s overall health and, subsequently, the quality and color of the blooms.

Are there hydrangeas that are specifically bred to have red leaves throughout their lifecycle?

While some hydrangea varieties naturally exhibit red tinges, especially in fall, there aren’t varieties known to maintain red leaves throughout their entire lifecycle.

Breeding practices usually focus on bloom colors and hardiness rather than consistent red foliage.

How do temperature fluctuations affect the leaf color in hydrangeas?

Sudden temperature fluctuations, especially early frosts in the fall, can lead to reddening of hydrangea leaves.

Consistent cold temperatures signal the plant to prepare for dormancy, which often includes a color change in the leaves. Protecting the plants from unexpected frosts can help in delaying this process.

My hydrangea’s leaves turned red after repotting. Could the repotting process cause this?

Yes, repotting can cause stress to plants, leading to changes like reddening of leaves. Additionally, if the new soil has a different pH or nutrient composition, it could affect the leaf color.

It’s essential to ensure the new pot provides proper drainage and that the soil is suitable for hydrangeas.

Do indoor hydrangeas also experience red leaves like their outdoor counterparts?

Indoor hydrangeas can exhibit red leaves, but the causes might differ. Indoor conditions like dry air, inconsistent watering, or exposure to direct sunlight from windows can lead to leaf redness. Adjusting these factors can help in maintaining the desired leaf color indoors.

Final Words

Hydrangeas, with their captivating blooms and leaves, truly are a garden’s treasure. Whether they wear green, red, or a hue in between, they remind us of the ever-changing, ever-beautiful dance of nature.

Cherish them, care for them, and let them paint your garden with their vivid stories. We’ve recently written an article about the most popular types of flowers found on farms, so make sure to check it out.