Kaiu Clematis Clematis 'Kaiu' (V)

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
clematis 'Kaiu'


The Clematis 'Kaiu' is a visually stunning plant characterized by its impressive flowers. The blooms are the most striking feature, often showcasing a lovely shade of light lavender or a soft, pastel purple. These flowers are notable for their rounded shape and form a striking display when they open fully. Each individual flower is composed of multiple petals that radiate symmetrically from the center, creating a harmonious and balanced look. The petals themselves have a velvety texture that adds a sensory appeal to the aesthetic qualities of the plant. The edges of the petals may display a slightly ruffled or wavy margin, contributing to the overall ornate look of the flower. At the heart of each bloom, a group of contrasting yellow or cream-colored stamens stands out, providing a vibrant contrast to the cool tones of the petals and drawing the eye to the center of the flower. Foliage on the Clematis 'Kaiu' is typically dark green, offering a lush backdrop that further accentuates the beauty of the blooms. The leaves have a leathery texture and are usually compound, with several leaflets arranged along a common stalk. This creates a full and bushy appearance that complements the mass of flowers during the blooming season. The overall impression of the Clematis 'Kaiu' is one of romantic elegance, with its pastel-hued flowers and luxuriant green foliage, making it a beloved choice for gardeners looking to add a touch of refined beauty to their garden spaces.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Clematis 'Kaiu', Old Man's Beard, Leather Flower, Vase Vine.

    • Common names

      Clematis 'Kaiu' (V)

  • skullToxicity

    • To humans

      Clematis, including the variety 'Kaiu', can be toxic to humans if ingested. All parts of the plant contain protoanemonin, a compound that can cause severe irritation to the mouth, stomach, and intestinal tract upon ingestion. Symptoms of clematis poisoning may include nausea, vomiting, diarrhea, and salivation. In severe cases, there can be symptoms of mouth ulcers, throat pain, and difficulty swallowing. Contact with the skin can also cause dermatitis in some individuals.

    • To pets

      Clematis, including the variety 'Kaiu', is also toxic to pets. Ingesting any part of the plant can lead to similar symptoms as seen in humans, which include drooling, vomiting, and diarrhea. If your pet consumes clematis, they might also exhibit signs of oral irritation, such as pawing at the mouth and visible discomfort due to the protoanemonin present in the plant. Severe cases may lead to more pronounced symptoms and require veterinary attention.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      6 feet 7 inches (2 meters)

    • Spread

      3 feet (0.9 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Value: Clematis 'Kaiu' is known for its stunning flowers that add aesthetic beauty to any garden or landscape.
    • Versatility: It can be trained to climb trellises, fences, and arbors, or used as ground cover.
    • Seasonal Interest: Provides interest across multiple seasons with its blossoms in late spring to early summer and sometimes again in late summer to early fall.
    • Wildlife Attraction: Its blooms attract beneficial pollinators like bees and butterflies, enhancing biodiversity.
    • Low Maintenance: Once established, Clematis 'Kaiu' requires minimal care, making it suitable for gardeners of all levels.
    • Color Variety: Offers a refreshing change with its unique flower colors compared to more common clematis cultivars.
    • Space Efficient: Ideal for small gardens or limited spaces, as it grows vertically and can be trained easily.
    • Longevity: Clematis 'Kaiu' is a perennial plant, providing many years of enjoyment with proper care.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Living Screens: Clematis can be trained to grow on a trellis or fence to create a living screen, offering privacy and aesthetic appeal to outdoor spaces.
    • Garden Sculpture Integration: Gardeners can integrate Clematis with garden sculptures, allowing the vine to naturally climb and accentuate the artwork.
    • Containers and Pots: Due to its contained growth habit, Clematis is ideal for planting in containers or pots, offering versatility for balcony and terrace gardening.
    • Hair Accessory: The flowers of Clematis can be used to make delicate and fragrant hair accessories for special occasions, like weddings or festivals.
    • Dried Flower Arrangements: The blooms and seed heads of Clematis can be dried and used in flower arrangements for long-lasting decorations.
    • Photography Prop: Because of its striking blooms, Clematis can be used as a backdrop or prop in photography, enhancing photo compositions with its natural beauty.
    • Edible Flowers (by the adventurous): While not a common practice, some species of Clematis produce edible flowers that can be used for culinary experimentation, provided they are non-toxic and identified correctly.
    • Culinary Garnish: The vibrant flowers of Clematis can be used as a colorful garnish for plating and presentation in gourmet dishes.
    • Handmade Jewelry: Pressed or dried Clematis flowers can be incorporated into handmade jewelry, such as in resin pendants or as part of elaborate headdresses.
    • Educational Tool: Clematis can be used to teach principles of plant growth and maintenance, such as pruning, training, and trellis use, in gardening classes or workshops.

Interesting Facts

  • bedFeng Shui

    The Clematis is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Clematis is not used in astrology practice.

  • spiralPlant Symbolism

    • Ingeniousness: Clematis 'Kaiu' is known for its climbing nature, able to twist and turn as it grows upwards. This signifies a person's ability to navigate through complex situations with ease and adaptability.
    • Mental Beauty: The blossoms of the clematis symbolize the beauty that is not just skin deep, hinting at the value of intellectual and inner beauty.
    • Artistic Inspiration: Clematis, with its wide range of colors and forms, often inspires artists and creators, representing the muses that fuel artistic endeavors with new ideas and perspectives.
    • Overcoming Difficulties: As a plant that can grow in challenging conditions and still flower beautifully, clematis symbolizes resilience and the ability to prosper despite adversities.

Every 1-2 weeks
2500 - 10000 Lux
Every 3-4 years
Spring-Early Summer
As needed
  • water dropWater

    The Clematis 'Kaiu', commonly known as the Clematis, should be watered thoroughly, ensuring the soil is moist but not soggy. During the growing season, which is spring and summer, water the plant approximately once a week with about 1 gallon of water, depending on soil dryness and climate conditions. Adjust watering during hotter, drier periods to twice a week and scale back to every other week during cooler, moist conditions. It is crucial to avoid overwatering as Clematis roots are particularly susceptible to rot. In winter, reduce watering but make sure the soil does not completely dry out.

  • sunLight

    The Clematis 'Kaiu' thrives best in a location where it can receive full sun to partial shade. Ideally, plant it in a spot where the flowering part gets ample sunlight while the roots are shaded, either by low plants or a mulch layer. This light condition encourages vibrant blooms and healthy growth. Providing morning sun and afternoon shade can help protect the plant from the intense heat of midday sun, especially in hotter climates.

  • thermometerTemperature

    The Clematis 'Kaiu' is hardy and can tolerate a range of temperatures, but it prefers a temperate climate with an ideal growing temperature between 70°F and 75°F. It can survive minimum temperatures down to about 20°F, given that the roots are protected. However, prolonged exposure to temperatures below freezing should be avoided. In high heat areas where temperatures exceed 80°F, providing afternoon shade can help protect the Clematis from heat stress.

  • scissorsPruning

    Pruning the Clematis 'Kaiu' encourages strong growth and flowering. This variety benefits from light pruning in late winter or early spring before active growth begins. Remove dead or weak stems, and trim healthy stems to a set of strong buds about a foot above ground level. The best time to prune is after the risk of frost has passed but before the plant starts its vigorous growth. Pruning each year will help prevent tangling and promote more prolific blooms.

  • broomCleaning

    As needed

  • bambooSoil

    Clematis, commonly known as leather flower, thrives in well-draining, moisture-retentive soil with a neutral to slightly alkaline pH, ideally between 7.0 and 7.5. A best soil mix for this plant can be composed of equal parts garden soil, well-rotted compost, and perlite or vermiculite to ensure proper drainage and fertility.

  • plantRepotting

    Clematis plants, including the leather flower, generally need to be repotted every 2 to 3 years. It's best to repot during early spring before the plant enters its active growth phase.

  • water dropsHumidity & Misting

    Clematis, or leather flower, prefers a moderate humidity level but is quite adaptable and can tolerate the typical humidity found in most outdoor garden environments.

  • pinSuitable locations

    • Indoor

      Ensure bright, indirect light and cool, airy conditions.

    • Outdoor

      Plant in full sun to part shade, provide strong support.

    • Hardiness zone

      4-9 USDA

  • circleLife cycle

    The Clematis 'Kaiu', also known as Clematis viticella 'Kaiu', begins its life cycle as a seed, which upon germination in spring or early summer develops into a young seedling. It rapidly forms a robust root system and sprouts vines that stretch towards the light, often requiring support to climb. As the plant matures, it enters a vigorous vegetative growth phase, producing large, lance-shaped leaves and climbing stems. In late spring to early summer of the following year, the clematis enters its flowering stage, showcasing a profusion of small, nodding, bell-shaped purple flowers that attract pollinators. After pollination, the flowers are followed by distinctive, plumed seed heads, which persist into late summer and fall, before the plant enters dormancy for the winter. The cycle recommences with the onset of warmer weather in spring when new growth emerges from the crown, which is often situated below soil level to protect it from frost.

  • sproutPropogation

    • Propogation time

      Spring-Early Summer

    • The Clematis 'Kaiu', commonly referred to as a type of Clematis vine, is a beautiful flowering plant that can be propagated by taking semi-hardwood cuttings during summer when the plant is actively growing. To propagate using this method, a healthy stem of about 4 to 6 inches (10 to 15 centimeters) long with several leaves is ideal. Cut just below a leaf node, as this is where the highest concentration of natural rooting hormone is found. The cutting should then be stripped of the lower leaves, and the cut end can be dipped in rooting hormone to encourage root growth. Next, the prepared cutting is inserted into a pot filled with a mix of peat and perlite or a similar free-draining rooting medium and kept under high humidity and indirect light. It’s essential to keep the medium moist but not waterlogged. After several weeks to a few months, the cutting should have developed enough roots to be gradually acclimatized to less humid conditions before being planted out.