Any of the upright or climbing woody shrubs of the genus Hydrangea (family Hydrangeaceae), which are indigenous to the Western Hemisphere and eastern Asia. There are about 23 species. Many varieties are cultivated in greenhouses and gardens for their eye-catching, sometimes ball-shaped flower clusters.
Hills-of-snow, also known as the wild hydrangea (H. arborescens), is a little shrub with spherical clusters of white blooms that is about 1 meter (4 feet) tall. Hortensia, also known as the French hydrangea (H. macrophylla), is a kind of hydrangea that is frequently grown for its massive clusters of globular flowers that come in shades of pink, lavender, blue, and, in very rare cases, white. These developed types are pushed festive hydrangeas from the florist. The color of the flower varies depending on how acidic the growing medium is: rose-pink under conditions of neutral to low soil acidity, and blue under greater acidic conditions. By adding chemicals to the growing medium early on to boost its acidity, blue flowers can be created.
Do hydrangeas grow naturally in the US?
Two hydrangea species, Hydrangea quercifolia (oakleaf hydrangea) and Hydrangea arborescens (smooth hydrangea), both woody shrubs, are native to the North American continent and have been cultivated for use in landscaping on a commercial scale. Other hydrangea species have been used in landscaping, and a related, the loosely clinging vine Decumera barbara, appears to be fighting for acceptance as a garden plant. However, the oakleaf and smooth hydrangeas are the most prevalent North American species in the nursery industry. Hydrangea arborescens, known by its cultivars ‘Grandiflora’ (also known as ‘Hills-of-Snow’ hydrangea in older gardening literature), ‘Sterile,’ and, more recently, ‘White Dome’ (also known as ‘Dardom’) and ‘Annabelle’ (and her enormous-flowering cousins like Incrediball), is likely the North American hydrangea species that has been used in general gardens
Both the smooth and oakleaf varieties are native to damp woodlands with a variety of hardwood trees, and they both do well in soils that retain moisture and are rich in organic matter (naturally, that would be decomposing leaf and twig litter found on the forest floor). However, the inflorescence form (creamy white cones of flowers on H. quercifolia that age to red and brown, and creamy white spherical dome or ball-shaped that age to silvery-tan on H. arborescens) and foliage pattern of these shrubs differ in appearance (thick, large oakleaf-shaped foliage on H. quercifolia, and thin, flat green leavesthat are prone to wilting in summer heaton H. arborescens). This last characteristic determines when and how the plants can be pruned without damaging the flowering effect, as well as whether winter cold and late frosts might reduce the flower display. These two species also differ in flowering time (early or midsummer), and when they develop their flower buds. The early American botanist John Bartram first identified the Hydrangea quercifolia, which is native to a smaller area of the southeastern states and is winter hardy down to -15F. However, because it develops new flower buds the year before each flowering season, it may not reliably flower in the coldest climates (USDA zone 5), despite having lush and beautiful foliage. On the other hand, H. arborescens is more dependable for floral display because its flower buds form on new growth, that is, on a mass of stems that emerge (typically suckering from close to the ground) the current season. It is a native of moist rocky cliffs and seeps from New England to Missouri as well as southeastern states.
H. arborescens is perhaps the easiest of the native North American hydrangeas to grow across a greater area of the temperate zone since you can trim it to the ground each spring and expect vigorous new growth with a nice flower show that summer. Additionally, it can withstand moister soils that are heavier in clay or less “well-drained” and is winter-hardy in one or two colder zones (often zone 4, however other sources claim H. arborescens can thrive in the warmest regions of zone 3!). H. quercifolia, on the other hand, is a more sophisticated plant whose leaves turn a deep burgundy and orange hue in the fall. Its coarse and rocky structure and peeling coppery-tan bark also lend interest to the landscape in the winter, making it showy beyond its summer flowering season. While the oakleaf cultivars make excellent specimen plants and tolerate slightly drier soil conditions if shaded from the hottest sun of the day, the smooth hydrangea tends to wilt easily and is best used in moister sites, especially if it is to bake in sun during the hottest time. Its suckering habit also lends itself to massing and use as a summer hedge.
Hydrangeas are one of the most sought-after shrubs in North America! Known for their nostalgia as well as their modern design appeal, hydrangeas are a perfect fit in the landscape, a container garden, or used as cut flowers.
Because some kinds of hydrangea are particularly water-hungry, the word “hydrangea” is derived from the Greek words for “water” and “jar” (hydros and angos). The hydrangea is a native of both Asia and the Americas, although it was initially domesticated in Japan.
Where do hydrangeas typically grow?
More than 75 species of hydrangeas and 600 identified cultivars belong to this genus, which is indigenous to many different places, including Japan, Asia, Indonesia, the Himalayan Mountains, and the Americas. Hortensia is another popular name for hydrangea. Although they can become trees or climbing vines, hydrangeas are most frequently cultivated as shrubs. The plants have a range in height from 1 foot to around 100 feet as a climbing vine!
This plant is well-known because of the lovely flowers it produces. Most put on a dazzling performance from early spring till September. The big flowers are available in a range of sizes, hues, and forms. The blooms of hydrangeas might be pink, blue, red, white, purple, or even green. The flowering bushes may thrive in both full sun and partial shade.
Hydrangea bushes are familiar to many people from their youth. Today, we are experiencing a newfound love for them. The good news is that we can now grow a wide variety of hydrangeas that our grandmothers could never have imagined. Some more recent hydrangea varieties thrive in colder areas, others are so little that may be planted in permanent borders, while yet others have extraordinary huge blooms and vibrant colors.
Are hydrangeas indigenous to the UK?
Shrubs called hydrangeas produce white, pink, or blue flowers throughout the summer and fall. Depending on the soil’s makeup, their enormous mop-headed blossoms can change color. While alkaline soil turns the blossoms pink, acidic soil turns them violet or blue.
The height of a hydrangea can vary from one foot to ten feet. Light green stems eventually turn dark and woody with age. The length of the dark-green leaves ranges from four to ten inches. Flowers come in clusters the size of apples, each with four petals, and they might be white, lilac, pink, or blue.
The shrub is indigenous to North and South America as well as East Asia. Although hydrangeas native to temperate regions are deciduous, it can be either an evergreen or deciduous plant. In Britain, hydrangeas are typically imported from Japan to be marketed and farmed there.
Hydrangeas bloom in the garden from late summer to early fall. From early spring to late autumn, the blooms are offered for sale.
The Hydrangeaceae genus of flowering shrubs and plants, which is where the bushes are from, is a member of the Cornales order. When present, the petals of these woody plants come in multiples of four.
A shaded area with well-drained soil is ideal for hydrangeas. They dislike the direct sun and the chilly easterly breezes. Before planting, it’s a good idea to incorporate some compost, leaf mold, or manure into the soil. With hydrangeas, the only trimming required is the removal of a wasted flower head, which should only be done in the spring and never in the fall.
Treatment of kidney and bladder problems is one of its primary medical applications. Peeling off the bark allows for the treatment of burns, wounds, and bruises.
The Northeast is home to hydrangeas.
The American hydrangea, sometimes known as the smooth hydrangea, is a deciduous shrub that reaches a height of 5 feet (1.5 meters). The small populations in New England, which are native to most of eastern North America, are regarded as introduced because they are primarily found in disturbed environments. In contrast to showier cultivated hydrangeas, its clusters of somewhat little white blooms are modest but bloom for a long time. Additionally, the plants can survive in rain gardens, are helpful for erosion management, and are tolerant of poor soil conditions.
When did hydrangeas start to grow?
As I already mentioned, hydrangeas have been around for more than 23 million years. An Alaskan mountain called Jaw Mountain yielded a fossilized species known as Hydrangea alaskana from a piece of paleogene-era granite (which dates from 66 million to 23 million years ago).
In Asia, the continent with which hydrangeas are more closely identified and where it is documented that people first began cultivating the plant thousands of years ago, fossils have also lately been found.
Asian variants first arrived in Europe in 1775 when Swedish naturalist Carl Peter Thunberg returned from an expedition to Asia with five plants. The plant has now become increasingly common in gardens throughout the Northern Hemisphere, where it thrives in the cooler, wetter climate.
The different types of Hydrangeas
Over 600 recognized cultivars and 70–75 species of hydrangeas exist. In order to make it easier for you to locate the ideal kind for your garden, the hydrangea can be divided into five varieties.
There are five varieties of hydrangeas:
- Macrophylla (Bigleaf or French Hydrangea)
- Smooth (Tree Hydrangea)
- Panicle
- Oakleaf
- Climbing
They go by the scientific name Hydrangea macrophylla and are the most popular kind of hydrangea. They have large leaves, as suggested by its common name! These Hydrangeas come in three different varieties, which adds a little complexity to the situation:
- Large, full flowerheads with purple, pink, or blue hues characterize mopheads. Based on the acidity of your soil, you can affect the color.
- Lacecap: These have lovely individual flowers all around a center of small flower buds.
- Mountain: These resemble lacecaps in appearance, but have smaller blooms and leaves. They can withstand late-winter cold spells because they are much more resilient.
Smooth Hydrangeas (Hydrangea arborescens), which are native to the USA, are enormous in size, reaching heights of about 6 feet, and are frequently described to as “trees”! They produce flowers that are initially green and turn white over time. They bloom from July to September and can withstand hotter conditions.
Instead of round-headed blooms, the varieties of hydrangea paniculata and grandiflora produce cone-shaped ones. These cultivars frequently start off white and mature to pink. Most are East Asian natives and can withstand low temperatures, but they do need enough of sunlight. They begin to bloom in the late summer, and the trimming is simple. Their blossoms last for a very long time.
These hydrangeas (Hydrangea quercifolia) are so named because of their foliage, which resembles oak tree leaves. Additionally, their leaves change color in the fall, just like an oak tree (this is the only type of Hydrangea with this ability). Its single-blossom or double-blossom flowerheads resemble those of Panicle Hydrangeas; they begin as white and eventually turn pink. These Hydrangeas, which are American natives, can withstand drier environments and are winter-hardy.
Because it is a vine, Hydrangea animola ssp. petiolaris is quite unique from other varieties of hydrangeas. Its common name, the Japanese Hydrangea vine, refers to its Asian origin. It may climb as high as 80 feet, but getting there requires a persistent gardener because it can take the plant up to four years to begin showing indications of development. The entire plant, however, will thrive in deep shadow, and the fragrance of the mature, lacecap-like blossoms is well recognized.
Our Hydrangea ‘Magical Candle’
The Hydrangea paniculata “Magical Candle” has enormous conical heads of colorful blooms that change throughout the year from green-toned white to deep pink, perched atop dense dark green foliage. This resilient plant is simple to cultivate and care for and will continuously add color and interest to your yard.
This plant blooms from July to October, producing blossoms all summer and far into the fall. As with any other paniculata cultivar, plant Hydrangea paniculata ‘Magical Candle’ in moist, well-drained soil in full sun (though it will tolerate partial shade).
This lovely plant will expand to a size of 150cm in height and width with only minimal care needed—watering and a few light feeds in spring and summer. Additionally, it is fully hardy, so you will consistently receive stunning flowers. It’s a lovely option for a backyard ornamental plant!
Trim the branches back to the base after flowering to complete pruning. They never flower on old wood, thus you have less chance of unintentionally cutting off a flowering stem than with macrophylla varieties.
Do hydrangeas grow naturally in Japan?
In Japan, the hydrangea (, ajisai) is a well-liked flower. While European varieties were imported in the early 20th century, native Japanese hydrangea types have been referenced in written records dating back to the 8th century. The rainy season, which traditionally sees a lot fewer blossoms than the previous spring season, is when hydrangeas bloom. As a result, they become a symbol and the most well-known flower of the season between June and July.
In Japan today, there are more than 100 different types of hydrangeas, including some that blossom into balls of flowers and those whose flowers cover a bald spot. Hydrangeas are relatively simple to grow and are frequently found in parks and home gardens. Some temples are well-known for having hydrangea gardens, which are well-liked spots to observe a lot of blooms in a lovely setting. Be aware that the flowers are frequently trimmed too soon to guarantee a healthy flowering the following year.
Are hydrangeas native to New Zealand?
Glyn’s hydrangea plants were primarily imported from France, Britain, and the US. Here in New Zealand, he would also frequently look through the gardens of abandoned homesteads in quest of older, hardier types.
His primary seed suppliers were China, Korea, and Taiwan in Asia. Although I’ve done some breeding and selection, he claims that existing plants are difficult to surpass. That is why we brought in types that weren’t available in New Zealand, such “Merveille Sanguine,” which I called “Bloody Marvellous” by flipping the two words around.
Dichroa versicolor, often known as the evergreen hydrangea and a close relative of the hydrangea (recently recognized as a hybrid of the Vietnamese species Dichroa febrifuga and Hydrangea macrophylla), is the subject of his most recent breeding work. “We found that hydrangea and dichroa naturally cross-pollinate. Intergeneric hybrids are very uncommon. Pears often do not breed with apples, only other pears! We chose and gave the names “Summer Skies” and “Cambridge Blue” to several of our seedlings, which Woodleigh sells. Both are perennial.”
Plant family and variety: hydrangea The Hydrangea genus has about 75 species, the most of which are endemic to south and east Asian nations like Japan, China, and Korea. A few species are also found in the US.
John Bartram, a farmer and plant hunter, brought Hydrangea arborescens from North America to Europe in 1730, when it became the first hydrangea to grow in gardens there. The Georgia-native oak-leaved hydrangea (Hydrangea quercifolia), was next discovered by him and his son William.
In the same period, a doctor working for the Dutch East India Company named Engelbert Kaempfer discovered mophead and lacecap hydrangeas in Japan. But because Japan was a closed society at the time, it was very impossible to take any botanical samples from there. Charles Maries, an English botanist and plant collector, wasn’t able to bring samples of Hydrangea macrophylla and Hydrangea serrata to Europe until more than 150 years later.
The majority of ornamental hydrangeas that we cultivate now are cultivars or hybrids of species that are native to the US, China, and Japan. The most prevalent cultivar, with over 600 recognized varieties of either lacecap or mophead kinds, is Hydrangea macrophylla.
The flowerheads of Hydrangea macrophylla are all lacecaps in the wild. According to Glyn, breeders have continued to refine a naturally occurring “sport” from which mopheads descended.
Both lacecaps and mopheads are hardy, sun- and shade-tolerant plants, some of which thrive in coastal environments. In fact, hydrangea mopheads have become a native species on some islands in the Hauraki Gulf, particularly in the bays on Kawau Island that face south.
Along with Hydrangea serrata, one of Glyn’s favorites, other well-liked Asian hydrangeas include Hydrangea paniculata, renowned for its large, snow-white flowerheads, simple maintenance, and cold tolerance. This latter species, which naturally grows in Japan and Korea’s forested and mountainous regions, is less resistant of heat, wind, and drought than Hydrangea macrophylla.
Hydrangea aspera subsp. villosa is a big shrub that can reach heights of over 3 meters and is occasionally referred to as the “tree hydrangea.” It produces stunning lacecap flowerheads with mauve or blue centers and outside edges that are either white or pink.
The deciduous climbing Hydrangea anomala subsp. petiolaris, which inhabits the same regions as Hydrangea serrata, is a less frequent Asian species. Early summer brings lacecap blossoms to this self-clinging vine.
Due to their extreme cold hardiness, the two North American varieties Hydrangea arborescens and Hydrangea quercifolia are highly common in areas with frequent frosts. The majority of Hydrangea arborescens varieties are drought tolerant, produce huge white flowerheads, and are content in sun or shade. The different varieties of this drought-tolerant species grow well in shade or sunlight, and the creamy white blooms of oak-leaved Hydrangea quercifolia are cone-shaped (more so in cooler regions). Oak-leaved hydrangeas have pink-tinged flowers and burgundy and crimson leaves that change in the fall.
Diseases & issues with hydrangeas They don’t have many, and gardeners like hydrangeas because of their laid-back attitude. According to Janica Amoore, “Fungal diseases like botrytis and mildews can be a problem in moist or humid areas, especially when plants are under stress.”
“These can be managed with the aid of good cleanliness and well-maintained plants. The species of arborescens, aspera, paniculata, and quercifolia that are susceptible to root rots, most likely phytophthora, which is promoted by moist soil and humid conditions, “Adds she. Avoiding excessive watering or waterlogged soils, using trichoderma (a protective fungal), and minimizing root disturbance when planting will also assist.
Trim back to healthy wood above a bud if the Hydrangea macrophylla variety’s buds have been destroyed or damaged by frost. In order to develop cultivars of this plant in colder climates, gardeners need opt for younger remontant variants that may sprout new stalks during the summer from underneath iced buds.
flower arrangement There are three varieties of hydrangea flowers: mopheads, which have a globe form, flat lacecap clusters, and panicles, which have a cone shape (particularly Hydrangea paniculata and Hydrangea quercifolia).
All of these result in a mixture of tiny, inconsequential real flowers and bigger modified bracts or sepals of what Glyn calls “fake” flowers. These false flowers, which are sterile and colorful, draw pollinating insects to the flowerheads, which then pollinate the real flowers.
The vibrant outer sepals of the blossoms progressively lose their color as they ripen. This is most evident in cultivated hydrangeas, especially mopheads, which only have a few genuine flowers, explaining why their flowerheads can last for up to six months.
How the rainbow-colored hydrangeas change color Different cultivars and hybrids of Hydrangea macrophylla can vary the color of their blooms depending on the acidity of the soil they are in, unlike other hydrangeas (or any other plant, for that matter). Acidic soils cause flowerheads to be blue. Your blooms will be pink or crimson if your soil is more alkaline.
However, hydrangea blossoms are not only turned blue by acidity, but also by the presence of aluminum ions in the soil. This is why regularly adding lime to soil will turn pink hydrangeas blue, while regularly adding aluminum sulphate to soil will have the reverse effect.
Glyn and other experts, however, challenge the value of this method, contending that it is much preferable to cooperate with nature as opposed to fighting it by picking cultivars that will provide the greatest color for your soil.