Hydrangeas are among the most beloved flowering shrubs worldwide, admired for their vibrant blooms and versatility in gardens. 

Beyond their stunning beauty, hydrangeas hold cultural, ecological, and aesthetic significance, symbolising heartfelt emotions in various traditions and serving as a vital part of diverse ecosystems. 

From their ability to change flower colours based on soil pH to their historical roots spanning millions of years, these plants are as fascinating as they are beautiful. 

This article explores interesting facts about hydrangeas that highlight their unique qualities, rich history, and diverse uses, offering readers a deeper appreciation for these iconic flowers.

1. The Name "Hydrangea" Derives From The Greek Origin

The name "hydrangea" comes from the Greek words hydor (meaning water) and angos (meaning jar or vessel). This etymology reflects the plant's unique ability to retain water and its high demand for hydration. 

2. There Are Approximately 75 Different Species Of Hydrangeas

Hydrangeas are a diverse genus with approximately 75 species, each offering a unique set of characteristics. These species can be found across Asia and the Americas, with variations in bloom shapes, sizes, and growth habits. 

Some of the most popular species include Hydrangea macrophylla (bigleaf hydrangea), Hydrangea paniculata (panicle hydrangea), and Hydrangea quercifolia (oakleaf hydrangea). 

Bigleaf hydrangeas are well-loved for their large, mophead or lacecap blooms, while panicle hydrangeas are appreciated for their cone-shaped flowers that thrive in colder climates. Oakleaf hydrangeas stand out for their unique foliage, which turns vibrant shades of red and purple in autumn. 

3. Hydrangea Were First Cultivated In Japan And Introduced To Europe In 1736

Hydrangeas have a rich history that began in Japan, where they were first cultivated centuries ago. Known as ajisai in Japanese, these flowers are celebrated for their delicate beauty and cultural significance. 

Temples and traditional gardens often feature hydrangeas, particularly during Japan's rainy season when their blooms are at their peak. Festivals dedicated to hydrangeas, such as the famous Kamakura Hydrangea Festival, draw visitors who admire the breathtaking displays.

The journey of hydrangeas to Europe began in 1736 when they were introduced by plant collectors fascinated by their vibrant colours and adaptability. Initially seen as exotic novelties, hydrangeas quickly gained popularity across European gardens for their dramatic presence and long-lasting blooms. 

4. Fossils Indicate That Hydrangeas Have Existed For Over 45 Million Years

Hydrangeas have an ancient lineage, with fossil evidence suggesting their existence dates back over 45 million years. These fossils, discovered in North America and Asia, reveal that hydrangeas were thriving long before the first humans walked the earth. 

This remarkable history places hydrangeas among some of the oldest flowering plants, making them living relics of prehistoric times.

Their resilience and adaptability likely contributed to their survival through various climatic changes. Today’s hydrangeas are direct descendants of those ancient plants, carrying genetic traits that have helped them endure for millennia. 

5. The Colour Of Hydrangea Flowers Can Change Based On Soil pH

One of the most captivating characteristics of hydrangeas is their ability to alter flower colour depending on the pH of the soil. This phenomenon is particularly noticeable in bigleaf hydrangeas (Hydrangea macrophylla), which are known for their vibrant and variable hues. 

The colour change occurs due to the availability of aluminium in the soil, which is affected by its acidity or alkalinity. Here’s how the ideal pH levels influence the flower shades:

• Blue blooms appear in soils with a pH below 5.5, where aluminium is highly available.
  
• Purple blooms develop in soils with a pH between 5.5 and 6.5, striking a balance between acidic and neutral.
  
• White blooms thrive in soils with a pH between 6 and 6.2, although their colour is less influenced by pH and remains consistent.
  
• Pink blooms emerge in soils with a pH over 7, where aluminium becomes unavailable due to high alkalinity.
  

This unique feature allows gardeners to "paint" their gardens naturally, experimenting with different soil treatments to achieve desired colours. For instance, adding aluminium sulphate increases soil acidity and promotes blue flowers, while applying lime raises pH levels, encouraging pink tones. 

White hydrangeas, on the other hand, stay true to their colour regardless of pH, adding classic elegance to gardens.

6. All Parts Of The Hydrangea Plant Contain Cyanogenic Glycosides

Hydrangeas are beautiful, but it’s important to know that every part of the plant contains cyanogenic glycosides, a compound that can release cyanide when consumed in significant amounts. 

This natural defence mechanism helps deter herbivores from eating the plant. While this toxicity isn’t typically a concern for humans admiring hydrangeas in their garden, it can pose risks if ingested, particularly for pets like dogs and cats or livestock that may graze nearby.

Symptoms of cyanogenic glycoside poisoning include nausea, vomiting, difficulty breathing, and in severe cases, seizures. Fortunately, incidents of poisoning are rare, as hydrangeas are not especially palatable. However, caution is advised when placing hydrangea arrangements within reach of children or animals.

7. Hydrangeas Are Sensitive To Drought

Hydrangeas are well-loved for their lush, vibrant blooms, but they require consistent moisture to thrive. These plants are particularly sensitive to drought conditions, which can cause them to wilt quickly and lead to reduced flowering. 

Hydrangeas’ high water needs align with their name’s Greek origin, meaning "water vessel," and they perform best in soil that is consistently moist but well-drained.

During periods of drought or intense heat, hydrangeas should be watered deeply at least once or twice a week to ensure their roots receive sufficient hydration. Adding a layer of mulch around the base of the plant helps retain soil moisture and protects the roots from drying out.

While hydrangeas are drought-sensitive, they’re also quite resilient when given the care they need. A wilted plant can often recover quickly after being watered, making them a forgiving choice for gardeners who are attentive to their needs.

8. Blake Lively Chose Romantic Pink Hydrangeas For Her 2012 Wedding Bouquet To Ryan Reynolds

Hydrangeas are not only adored in gardens but also cherished in weddings for their lush, romantic appearance. Blake Lively, one of Hollywood’s most stylish stars, selected pink hydrangeas for her wedding bouquet when she married Ryan Reynolds in 2012. 

9. The Colourful Parts Of Hydrangea Flowers Are Sepals, Not True Petals

When you admire a hydrangea’s colourful blooms, you might assume the vibrant, petal-like structures are traditional flower petals. 

However, these are actually sepals—modified leaves that protect the true flowers hidden in the centre of the cluster. The true flowers are much smaller and less noticeable, often requiring close inspection to see.

The sepals’ main role is to attract pollinators with their bright colours, ensuring the plant’s reproductive success. This clever adaptation allows hydrangeas to stand out in the garden while focusing their energy on producing seeds.

Sepals also make hydrangeas an excellent choice for long-lasting floral displays. Unlike delicate petals, sepals are sturdier and less prone to wilting, which is why hydrangea blooms maintain their beauty for weeks, whether in the garden or as cut flowers.

10. In Japan, Hydrangea Leaves Are Used To Make "Amacha” Tea

In Japan, hydrangeas are celebrated not just for their beauty but also for their cultural significance. One unique use of hydrangeas in Japan is the production of "amacha," a sweet tea made from the leaves of specific hydrangea species. 

The term "amacha" translates to "sweet tea" and is traditionally used in Buddhist rituals, particularly during Kanbutsu-e, a ceremony honouring Buddha’s birthday.

To make amacha, the leaves are harvested, steamed, and dried. When brewed, the tea releases a naturally sweet flavour, thanks to a compound called phyllodulcin, which is significantly sweeter than sugar. The tea is often poured over Buddha statues as part of religious celebrations and also enjoyed for its refreshing taste.

While amacha is deeply rooted in tradition, it is also appreciated for its unique flavour and symbolic connection to harmony and spirituality. This adds another layer of appreciation for the versatile hydrangea.

11. Hydrangeas Exhibit Various Bloom Forms

One of the most fascinating features of hydrangeas is the variety of bloom forms they produce, each offering unique charm and visual appeal. The two most common bloom types are mophead and lacecap. 

Mophead hydrangeas, with their large, rounded flower clusters, are often the showstoppers in gardens. Their dense, spherical blooms make a bold statement, attracting attention from afar.

Lacecap hydrangeas, on the other hand, have a more delicate and understated beauty. They feature a flat arrangement with tiny fertile flowers at the centre, surrounded by larger, colourful sterile flowers. This structure creates a lace-like appearance, hence the name.

Panicle hydrangeas add even more diversity with their cone-shaped clusters, which start as creamy white and often transition to pink or red hues as they mature. 

12. Different Hydrangea Species Are Suited To Various Climates

Hydrangeas are incredibly adaptable, with different species thriving in a range of climates, from chilly northern regions to warm tropical areas. 

For gardeners in cooler climates, Hydrangea paniculata and Hydrangea arborescens are excellent choices. These species are hardy and capable of withstanding frosty winters, blooming reliably even after harsh weather.

In warmer climates, Hydrangea macrophylla (bigleaf hydrangea) and Hydrangea quercifolia (oakleaf hydrangea) thrive, bringing lush foliage and vibrant blooms to temperate gardens. The oakleaf hydrangea, in particular, is well-suited for hot, humid conditions and offers the added bonus of stunning autumn foliage.

For mountainous regions, Hydrangea serrata, a smaller, more delicate species, is an ideal option, thriving in the cool, moist conditions found at higher altitudes. By choosing the right species for your climate, you can enjoy the beauty of hydrangeas regardless of where you live.

13. Hydrangeas Are Relatively Resistant To Pests

Hydrangeas are a favourite among gardeners not only for their stunning blooms but also for their resilience against many common garden pests. Unlike other flowering shrubs, hydrangeas are not prone to extensive pest infestations, making them a low-maintenance choice.

Occasionally, they may be affected by aphids, spider mites, or scale insects, but these pests rarely cause significant damage and can be managed with simple treatments like neem oil or soapy water sprays. 

Slugs and snails may nibble on young shoots or leaves, but their impact is typically minimal, especially with the use of barriers or organic deterrents.

The plant’s natural pest resistance makes it an excellent option for both novice and experienced gardeners looking for a hardy and reliable addition to their landscape. With basic care, hydrangeas will flourish beautifully while keeping pest problems to a minimum.

14. Dwarf Hydrangea Varieties Can Be Successfully Grown In Containers

For those with limited garden space, dwarf hydrangea varieties are a perfect solution, thriving beautifully in containers. 

Compact species like Hydrangea paniculata ‘Little Lime’ or Hydrangea macrophylla ‘Mini Penny’ are specially bred to maintain a manageable size while delivering the same vibrant blooms as their larger counterparts.

Container gardening with hydrangeas offers versatility, allowing you to move the plants to different locations to suit seasonal changes or aesthetic preferences. It also provides more control over soil conditions, which is especially beneficial for gardeners wanting to experiment with flower colours by adjusting soil pH.

15. Some Hydrangea Species Exhibit Moderate Salt Tolerance

For gardeners living in coastal areas, finding plants that can handle salt exposure can be a challenge. Fortunately, certain hydrangea species exhibit moderate salt tolerance, making them suitable for gardens near the sea. These resilient species can withstand salty winds and soils better than more delicate varieties.

To further protect hydrangeas in coastal environments, consider planting them in sheltered locations or using windbreaks to minimise direct salt exposure. Adding organic matter to the soil also helps improve its structure and reduces salt concentration around the roots.

16. Most Hydrangeas Are Not Fragrant

Despite their lush and vibrant appearance, most hydrangeas are surprisingly not fragrant. Unlike roses or jasmine, hydrangeas lack the sweet scent typically associated with flowering plants. 

This is because their primary pollinators—bees and other insects—are attracted to their colourful sepals rather than scent. Hydrangeas rely on visual appeal to draw pollinators, which explains their striking hues and diverse bloom shapes.

While the lack of fragrance might seem like a downside, it makes hydrangeas a fantastic choice for gardeners who are sensitive to strong scents or prefer fragrance-free spaces. 

Their visual splendour more than makes up for the absence of aroma, ensuring they remain a favourite for gardens and floral arrangements.

17. Native American Tribes Used Hydrangea Roots For Medicinal Purposes

Hydrangeas have a long history of use in traditional medicine, particularly among Native American tribes. The roots of certain species, such as Hydrangea arborescens (commonly known as smooth hydrangea or seven barks), were prized for their medicinal properties. 

These roots were often used to create remedies for urinary and kidney issues, including the treatment of bladder infections and kidney stones.

Hydrangea root was believed to have diuretic and anti-inflammatory properties, helping to flush out impurities and reduce discomfort. The preparation typically involved drying and grinding the root to create a powder, which was then brewed into a medicinal tea or tincture.

18. In Some Cultures, Hydrangeas Are Given As A Gesture Of Apology

Hydrangeas hold deep symbolic meaning in many cultures, and in some, they are associated with apologies and reconciliation. Their intricate blooms, which symbolise heartfelt emotions and understanding, make them a thoughtful gift when seeking forgiveness. 

The symbolism is particularly strong in Japan, where hydrangeas are often given as a gesture of regret or gratitude, reflecting the giver’s sincerity.

This connection to apology stems from the flower’s ability to change colour based on soil conditions, symbolising the changing emotions or understanding between people. 

A bouquet of hydrangeas can convey a sense of humility and a desire to mend relationships, making them a meaningful choice for occasions requiring reconciliation.

19. Hydrangeas Are Not Always The Best At Attracting Bees

While hydrangeas are undeniably stunning, they are not particularly effective at attracting bees. This is because most hydrangea varieties produce sterile flowers, which lack the nectar and pollen that bees typically seek. 

The vibrant sepals, which are designed to draw attention, often overshadow the small, fertile flowers hidden at the centre of the bloom cluster.

Lacecap hydrangeas, however, are an exception. Their flat, open structure makes the fertile flowers more accessible, offering some appeal to pollinators. Gardeners looking to support bees and other pollinators might consider planting a mix of hydrangeas alongside other nectar-rich plants like lavender or echinacea.

20. Japan Hosts Several Hydrangea Festivals In June

In Japan, hydrangeas (ajisai) are celebrated as symbols of the rainy season, with their peak blooming period coinciding with the country’s wettest months. 

June is particularly special, as it marks the start of tsuyu (the rainy season), when hydrangeas burst into full bloom, transforming gardens and temple grounds into vibrant displays of colour.

One of the most famous festivals is the Kamakura Hydrangea Festival, held at temples like Meigetsu-in, also known as the "Hydrangea Temple." Visitors flock to these sites to admire thousands of hydrangeas in various shades, creating a tranquil and picturesque atmosphere. 

Other notable events include the Bunkyo Hydrangea Festival in Tokyo and the Hakusan Shrine Festival, where the flowers are paired with traditional cultural activities.

21. Hydrangeas Were One Of The First Flowers To Be Grown Commercially In Greenhouses

Hydrangeas have a rich history in horticulture, being among the first flowers to be cultivated commercially in greenhouses. This began in the 18th century when their striking blooms gained immense popularity in Europe. 

Greenhouses provided an ideal environment for growing hydrangeas, allowing gardeners to control conditions like temperature, humidity, and light, ensuring optimal growth and year-round production.

These conditions enabled florists to meet the high demand for hydrangeas, particularly for use in weddings, décor, and special occasions. Their vibrant, long-lasting blooms made them a favourite choice for both indoor and outdoor displays.

22. In Korea, Hydrangea Leaves Are Used To Make A Special Tea Called "Gulganghwa-Cha"

In Korea, hydrangeas have a unique culinary use: their leaves are brewed into a traditional tea known as "gulganghwa-cha." This special tea is made using the leaves of specific hydrangea species, which are carefully harvested, dried, and processed to bring out their subtle flavours.

Gulganghwa-cha is appreciated for its mild sweetness and light floral undertones, making it a refreshing drink with cultural significance. The tea is often enjoyed during festivals and gatherings, symbolising harmony and the appreciation of nature’s bounty. 

While not as widely known as other teas, such as green or barley tea, gulganghwa-cha has a niche following among tea enthusiasts and those interested in traditional Korean practices.

23. In Victorian England, Hydrangeas Were Often Used To Convey Regret Or Refusal Of Romantic Advances

During the Victorian era, flowers were used to convey emotions and messages, a practice known as floriography. Hydrangeas played an intriguing role in this silent communication. 

They were often associated with regret, arrogance, or rejection, making them a symbolic choice when one wanted to decline a romantic advance politely but pointedly.

The association with arrogance arose from the hydrangea’s abundant blooms, which were seen as overly showy and ostentatious. On the other hand, their connection to regret came from their delicate yet enduring beauty, symbolising the bittersweet nature of missed opportunities or lost love.

24. Hydrangeas Are Considered Fast-Growing Shrubs

Hydrangeas are known for their vigorous growth, making them a favourite among gardeners looking for quick results. Depending on the species, hydrangeas can grow between 24 to 36 inches per year, reaching maturity in just a few seasons. 

This rapid growth makes them ideal for filling empty spaces in the garden, creating lush hedges, or establishing privacy screens.

For optimal growth, hydrangeas thrive in well-drained soil with consistent moisture and benefit from regular feeding with a balanced fertiliser. 

25. Each Colour Of Hydrangeas Has Different Meanings

Hydrangeas are not only admired for their beauty but also cherished for the symbolic meanings behind their various colours. These meanings add depth to their appeal, making them a popular choice for gifts and occasions.

• Blue hydrangeas represent forgiveness and understanding, often symbolising heartfelt apologies or gratitude.
  
• Pink hydrangeas convey romance, love, and sincere emotions, making them a common choice for weddings and anniversaries.
  
• White hydrangeas signify purity and grace but can also represent vanity, reflecting their pristine and delicate appearance.
  
• Purple hydrangeas are associated with pride, royalty, and deep understanding, often symbolising abundance and luxury.
  

These meanings can vary slightly across cultures, but they generally highlight the hydrangea’s ability to convey complex emotions. Whether given as a gesture of love or reconciliation, the colour of a hydrangea adds a thoughtful layer of sentiment to its already captivating appearance.

26. Hydrangeas Are The Official State Wildflower Of Alabama

In 1999, the state of Alabama officially designated hydrangeas as its state wildflower, recognising their natural beauty and abundance within the region. The specific variety highlighted is the oakleaf hydrangea (Hydrangea quercifolia), which is native to the southeastern United States, including Alabama. 

This species is cherished for its distinctive cone-shaped flowers and unique foliage that turns brilliant shades of red, orange, and purple in the autumn.

Oakleaf hydrangeas thrive in Alabama’s warm, humid climate, often found in wooded areas and along streams, where their natural charm adds vibrancy to the landscape. 

The decision to honour hydrangeas as the state wildflower was also a nod to their ecological significance, as they provide habitat and support for local wildlife.

27. These Flowers Typically Bloom From May To July

Hydrangeas are a highlight of the late spring and early summer garden, typically blooming from May to July. During this period, their vibrant and abundant flowers transform landscapes with bursts of colour. The exact bloom time varies depending on the species and climate. 

For instance, bigleaf hydrangeas (Hydrangea macrophylla) often bloom in early summer, while panicle hydrangeas (Hydrangea paniculata) can extend their flowering period into late summer.

Proper care can ensure prolonged blooming. Providing hydrangeas with the right balance of sunlight, water, and nutrients encourages healthy flower production. Deadheading spent blooms can also extend the flowering season, keeping the plants looking fresh and vibrant.

28. Hydrangea Day Is January 5

Hydrangeas are so beloved that they have their own day of celebration—Hydrangea Day, observed on January 5. While hydrangeas are not in bloom during this time in most regions, the day serves as an opportunity to appreciate their beauty and cultural significance. 

Enthusiasts celebrate by sharing tips on hydrangea care, showcasing dried or preserved arrangements, or planning their garden’s spring planting.

The date also provides a reminder that, despite the winter chill, hydrangeas will soon bring their lush beauty back to gardens. Florists may mark the occasion by featuring hydrangeas in bouquets or highlighting their versatility in floral design.

29. Hydrangea Is Pronounced As "Hai-Dran-Juh"

Pronunciation can sometimes trip people up, but the correct way to say hydrangea is "hai-dran-juh." The name reflects its Greek origins, with "hydor" meaning water and "angos" meaning vessel, a nod to the plant's need for ample hydration.

This pronunciation is consistent across British and American English, although regional accents may add subtle variations. Knowing how to pronounce hydrangea correctly can enhance your confidence when discussing these stunning plants with fellow gardeners or florists.

30. Madonna Is Not A Fan Of Hydrangeas

Pop icon Madonna famously declared her dislike for hydrangeas in 2011, sparking widespread conversation and a bit of humour among fans and flower enthusiasts. During a press event, a fan gifted her a bouquet of hydrangeas, to which she later remarked offhandedly that she "loathes hydrangeas."

The comment went viral, with florists and gardeners poking fun at the unexpected controversy. Some even created "anti-hydrangea" memes and campaigns in jest. Despite this, hydrangeas remained as popular as ever, beloved for their stunning appearance and versatility in gardens and floral arrangements.

Madonna’s aversion became a quirky footnote in the history of hydrangeas, adding a touch of celebrity drama to their story. 

While they may not be her favourite, hydrangeas continue to captivate millions of admirers worldwide, proving that their appeal transcends personal preferences—even those of global superstars.

31. New England Is Known For Its Hydrangeas

New England is a hydrangea lover’s paradise, especially during the summer months when these stunning flowers burst into full bloom. The region’s coastal climate, with its mild summers and well-drained soils, provides the ideal conditions for hydrangeas to thrive. 

Cape Cod, in particular, is renowned for its picturesque gardens brimming with colourful hydrangeas, making them an iconic feature of the area’s landscape.

Every July, the Cape Cod Hydrangea Festival celebrates this floral favourite with garden tours, workshops, and events showcasing the beauty and versatility of hydrangeas. 

Visitors flock to the festival to admire a variety of species, including bigleaf, panicle, and smooth hydrangeas, each adding its unique charm to the region’s gardens.

32. There's An American Hydrangea Society

For true hydrangea enthusiasts, the American Hydrangea Society (AHS) provides a dedicated space to celebrate and learn about these beloved plants. Founded in 1994, the AHS brings together gardeners, horticulturists, and hobbyists with a shared passion for hydrangeas.

The society offers resources such as newsletters, educational seminars, and garden tours, helping members expand their knowledge of hydrangea care, propagation, and species diversity. 

One of the highlights of membership is the opportunity to network with fellow hydrangea lovers, exchange gardening tips, and gain insights into new cultivars and trends.

Based in Atlanta, Georgia, the AHS also organises an annual hydrangea conference that draws attendees from across the United States. 

This community-driven organisation has played a vital role in promoting the appreciation of hydrangeas and advancing horticultural practices, making it a cornerstone for those who adore these beautiful shrubs.

33. Proper Pruning Times Vary By Species

Pruning hydrangeas is essential for maintaining their health and encouraging prolific blooms, but the timing varies depending on the species. Understanding the specific needs of your hydrangea ensures you don’t accidentally cut off flower buds, which could lead to a disappointing bloom season.

For hydrangeas that bloom on old wood, like bigleaf (Hydrangea macrophylla) and oakleaf (Hydrangea quercifolia), pruning should be done immediately after flowering. 

This timing allows the plant to set buds for the following year. In contrast, species that bloom on new wood, such as smooth (Hydrangea arborescens) and panicle (Hydrangea paniculata), can be pruned in late winter or early spring before new growth begins.

34. They're A Common Fourth Wedding Anniversary Gift

Hydrangeas are a meaningful and elegant choice for fourth wedding anniversary gifts, symbolising gratitude, understanding, and heartfelt emotion. Their intricate blooms, which represent the coming together of many small elements to create a harmonious whole, make them a fitting metaphor for the journey of a marriage.

The tradition of giving hydrangeas for a fourth anniversary also ties into their ability to change colours based on soil pH, reflecting the adaptability and growth required in a lasting relationship. Pink hydrangeas, representing love and sincerity, are particularly popular for this milestone.

35. They Can Turn Green Without Enough Natural Light

Hydrangeas are known for their vibrant blooms, but under certain conditions, their flowers can turn green. This colour change often occurs as the blooms mature. While this phenomenon is natural, environmental factors can also play a role.

Lack of sufficient natural light is one of the primary reasons hydrangea flowers turn green. Without adequate sunlight, the pigments responsible for their vivid colours diminish, leaving behind a green hue. Additionally, soil conditions and the plant’s natural ageing process can contribute to this change.

Conclusion About Facts About Hydrangeas

Hydrangeas are more than just beautiful flowers; they are a rich tapestry of history, symbolism, and versatility. From their ancient origins and cultural significance to their ability to transform garden spaces with vibrant blooms, hydrangeas have a fascinating story to tell. 

Now is the perfect time to explore hydrangeas in your own garden or as part of a heartfelt gift. For those in Singapore, Windflower Florist offers an exquisite selection of hydrangea bouquets, freshly crafted each day to ensure the utmost quality. 

With fast and reliable same-day delivery, you can surprise your loved ones with a stunning arrangement that speaks volumes.

Shop hydrangea flowers now at Windflower Florist and experience the unmatched beauty and service that make us Singapore’s premier florist!

Frequently Asked Questions About Fun Facts About Hydrangeas

Does Every Species Of Hydrangea Change Flower Colour Based On Soil pH?

No, not every species of hydrangea can change flower colour based on soil pH. This unique trait is primarily seen in bigleaf hydrangeas (Hydrangea macrophylla) and mountain hydrangeas (Hydrangea serrata), where the availability of aluminium in acidic or alkaline soils influences bloom colour. 

Other species, such as white hydrangeas and panicle hydrangeas (Hydrangea paniculata), maintain their original flower colour regardless of soil conditions.

When Is The Best Time To Plant Hydrangeas In Singapore?

In Singapore’s tropical climate, hydrangeas can be planted almost year-round, but the cooler and wetter months, such as from November to January, are ideal for establishing their roots. 

During these months, the consistent rainfall reduces the stress of transplanting, allowing the plant to adjust better to its new environment. However, ensure the planting site offers partial shade and good drainage, as hydrangeas thrive in moist but not waterlogged soil.

Do Hydrangeas Require Fertilisers To Thrive?

Yes, hydrangeas benefit from regular fertilisation to promote healthy growth and vibrant blooms. A balanced fertiliser applied during the growing season, typically every four to six weeks, helps provide essential nutrients like nitrogen, phosphorus, and potassium. 

For better results, choose a fertiliser suited to the soil type or one that enhances flower colour if you are experimenting with soil pH adjustments.

Should Hydrangeas Be Watered Regularly?

Yes, hydrangeas require consistent watering to thrive. They prefer moist soil but need good drainage to avoid waterlogging, which can lead to root rot. 

In Singapore’s hot and humid weather, hydrangeas may need watering two to three times a week, especially during dry periods, to prevent wilting and ensure healthy blooms.