Hortensia Hydrangea Hydrangea involucrata 'Hortensis' (d)
ABOUT
The Hydrangea involucrata 'Hortensis', commonly known as hortensia, is a beautifully ornate plant cherished for its attractive foliage and large, showy flower heads. The plant is characterized by its lush green leaves, which have a slightly toothed edge and may take on a leathery texture. Its leaves can create a rich backdrop that highlights the plant's blooms. The flowers are the most striking feature of the hortensia. They are grouped together in what is known as a corymb, which is essentially a cluster of flowers that forms a flat or slightly rounded shape. Each flower head consists of small, fertile flowers in the center, which are typically encircled by larger, showier infertile flowers. The color of the blooms can vary widely, presenting in shades of blue, pink, violet, or white, and can sometimes change color depending on the soil conditions, especially the pH level. These flower heads make the hortensia a popular choice in ornamental gardens, offering a dramatic display when they are in full bloom. The difference in flower colors within the same cluster can sometimes give a variegated appearance, adding to the visual interest of the plant. The stems of the hortensia are sturdy enough to support the weight of the blooms, which can be quite heavy due to their size. The hortensia's combination of expansive, dense foliage, and generous clusters of eye-catching flowers make it a favorite among gardeners who want to add a splash of color and texture to their garden spaces. Despite its ornamental charm, the plant's specific appearance can vary slightly due to growing conditions and care practices, making each specimen unique in its own right.
About this plant
NamesSynonyms
Bracted Hydrangea, Hortensia, Japanese Hydrangea, Underleaf Hydrangea.
Common names
Hydrangea hortensis.
ToxicityTo humans
The plant commonly known as Hydrangea is considered to have a low level of toxicity to humans. Ingesting parts of this plant, such as the leaves or flowers, can potentially lead to symptoms of poisoning due to the presence of cyanogenic glycosides which release hydrogen cyanide when chewed or digested. Symptoms may include stomach upset, vomiting, and diarrhea. In severe cases, ingestion may result in more serious effects such as dizziness, difficulty breathing, or convulsions, but such extreme reactions are rare.
To pets
Hydrangea is also toxic to pets, particularly to dogs, cats, and horses. Similar to its effects on humans, the toxicity arises from cyanogenic glycosides found in the plant. When ingested by pets, these compounds can lead to symptoms such as vomiting, diarrhea, lethargy, and depression. In severe cases, ingestion of Hydrangea could potentially lead to more serious symptoms such as increased heart rate, rapid breathing, and cyanosis. Pet owners should contact a veterinarian if they suspect their pet has consumed any part of the Hydrangea plant.
CharacteristicsLife cycle
Perennials
Foliage type
Deciduous
Color of leaves
Green
Flower color
Varies
Height
2-4 feet (0.6-1.2 meters)
Spread
2-4 feet (0.6-1.2 meters)
Plant type
Shrub
Hardiness zones
5
Native area
Japan
Benefits
General Benefits- Aesthetic Appeal - The Hydrangea involucrata 'Hortensis', commonly known as Hortensia, offers beautiful large, showy blooms that enhance the visual appeal of gardens and landscapes.
- Color Variety - Hortensias are known for their variety of colors, which can range from blue, pink, purple, to white, depending on soil pH levels.
- Seasonal Interest - They bloom from early summer to late autumn, providing prolonged interest in the garden.
- Attracts Pollinators - The flowers are attractive to bees, butterflies, and other pollinators, helping to support local ecosystems.
- Shade Tolerance - Hortensias can grow in partial shade, making them suitable for planting under trees or in areas with dappled sunlight.
- Versatility - These plants can be used in a variety of garden designs, including borders, foundation plantings, and as specimen plants.
- Easy Propagation - Hortensias can be easily propagated through cuttings, making it simple for gardeners to multiply their plants.
Medical PropertiesThis plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- Pressed Flower Art: The vibrant blossoms of Hydrangea involucrata can be pressed and used in artistic creations like bookmarks, greeting cards, or framed botanical art.
- Dye Production: The flowers and leaves may be used to create natural dyes for textiles, yielding colors ranging from pale green to shades of blue and purple depending on the pH.
- Crafts: The woody stems of older hydrangea plants can be used in various crafts, such as making walking sticks or woven into decorative wreaths.
- Garden Design: Hydrangeas are often used as a focal point in shade gardens due to their large, attractive leaves and clusters of flowers.
- Dried Flower Arrangements: The long-lasting flowers dry well and can be used in dried floral arrangements, adding color and texture to home décor.
- Photography: The lush, striking blooms provide a perfect subject for botanical photography and can help hobbyists practice close-up flower photography.
- Education: Hydrangeas can be used to teach botany and horticulture students about plant propagation and floral structure, particularly inflorescence types.
- Erosion Control: The dense, fibrous root system of Hydrangeas can help stabilize soil and prevent erosion in garden landscapes.
- Seasonal Celebrations: Hydrangea flowers are popular in arrangements for events and celebrations, especially for spring and summer weddings.
- Frost Protection: The bushy growth of some Hydrangea involucrata varieties can provide a level of frost protection for more sensitive plants when grown in close proximity.
Interesting Facts
Feng ShuiThe Hydrangea is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe Hydrangea is not used in astrology practice.
Plant Symbolism- Heartfelt Emotions: Hydrangeas often symbolize the expression of deep-seated feelings, making them a popular choice for gifting to convey sincere emotion.
- Gratitude: The plant can also represent gratitude and thankfulness, sometimes presented as a gesture of appreciation.
- Apologies: With its lush blooms, hydrangeas are also associated with making amends or expressing regret.
- Understanding: It may signify a desire for deeper understanding or can be a message of being understood by others.
- Boastfulness: In some cultural contexts, hydrangeas can stand for vanity or boastfulness, likely stemming from their showy and abundant flowerheads.
- Abundance: The voluminous quality of hydrangea flowers can symbolize abundance and prosperity.
WaterThe Hydrangea involucrata 'Hortensis', commonly known as Hortensia, prefers consistently moist soil, so it should be watered thoroughly whenever the top inch of soil feels dry to the touch. In general, this might mean watering once or twice a week, but the frequency can vary depending on climate conditions and soil drainage. Ensure that you provide enough water to soak the root zone each time you water—this could be approximately 1-2 gallons for mature plants under typical conditions. During hot, dry spells, the Hortensia may need more frequent watering to maintain soil moisture. Always avoid overwatering which can lead to root rot.
LightHortensia thrives best in partial shade to full morning sun with protection from harsh afternoon rays. The ideal spot is one that receives filtered sunlight or a few hours of direct sun followed by dappled shade. Too much direct sunlight can scorch the leaves, while too much shade can reduce blooming.
TemperatureHortensia prefers moderate temperatures and can typically survive in temperatures as low as 20 degrees Fahrenheit and as high as 80 degrees Fahrenheit. The ideal temperature range for promoting healthy growth and blooms is between 60 to 70 degrees Fahrenheit.
PruningPruning helps to maintain shape and encourage vibrant blooms in Hortensia. The best time to prune is in late winter or early spring before new growth begins. Remove dead or weak stems, and trim back last year's growth to just above the first pair of healthy buds. This should be done annually to promote healthy flowers and foliage.
CleaningAs needed
SoilThe best soil mix for a Hydrangea involucrata, commonly known as "Hortensia", should be rich in organic matter, well-draining, and moist. A mix of garden soil, peat moss, and perlite would suit well. Hortensias prefer slightly acidic soil with a pH ranging from 5.5 to 6.5 for optimal growth and flower color.
RepottingHortensias should be repotted every 2-3 years to refresh the soil and accommodate their growing root system. However, if you notice signs of root-bound conditions or declining health, it may need to be repotted sooner.
Humidity & MistingHortensias thrive best in environments with medium to high humidity levels, ideally around 60% or higher. They benefit from a misting routine or a humidifier to maintain the ideal humidity around the plant.
Suitable locationsIndoor
Place in bright, indirect light and keep soil moist.
Outdoor
Partial shade, sheltered spot, well-draining soil, keep moist.
Hardiness zone
5-9 USDA
Life cycleThe life of Hydrangea involucrata 'Hortensis' (d), commonly known as hortensia, begins with seed germination, which requires stratification or cold treatment to break dormancy. Once germinated, the seedling stage follows where the plant establishes its root system and shoots. As it enters the juvenile phase, hortensia develops its characteristic large leaves and begins to produce its first flowers after a few years of growth, typically in a controlled environment if cultivated. The mature hortensia is known for its large clusters of blossoms that can be blue, pink, or purple, influenced by the acidity of the soil. Once mature, it can reproduce through cuttings or seed production and continue this cycle. The plant goes through annual cycles of growth, blooming in late spring through early fall, and entering dormancy in winter.
PropogationPropogation time
Spring to Summer
Propogation: For Hydrangea involucrata 'Hortensis', also commonly known as hortensia hydrangea, the most popular method of propagation is through softwood cuttings. This process typically takes place in late spring or early summer when new growth is green and flexible. To propagate, one should select a healthy, non-flowering shoot and make a cutting of about 5 to 6 inches (approximately 12.7 to 15.24 centimeters). The lower leaves are then removed, leaving a few at the top, and the cut end is dipped in a rooting hormone to encourage root growth. The cutting should be placed in a well-draining soil mix, kept moist, and covered with a plastic bag or placed in a greenhouse to maintain humidity. Roots often develop within a few weeks, and once the cutting is well-rooted, it can be transplanted to a larger pot or directly into the garden.
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